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HIGASHIYAMA Hiroshi

    Department of Civil and Environmental Engineering　Professor
Last Updated :2024/04/23

Researcher Information

Degree

  • Dr.Eng.（Osaka University）
  • M.Eng.（Osaka University）

J-Global ID

Research Interests

  • Maintenance   Highway Bridge Slab   コンクリート構造   合成構造   Concrete Structure   Composite Structure   

Research Areas

  • Social infrastructure (civil Engineering, architecture, disaster prevention) / Structural and seismic engineering
  • Social infrastructure (civil Engineering, architecture, disaster prevention) / Civil engineering (materials, implementation, construction management)

Academic & Professional Experience

  • 2016/04 - Today  Kindai UniversityCivil and Environmental EngineeringProfessor
  • 2010/04 - 2016/03  Civil and Environmental Engineering, Kinki UniversityAssociate Professor
  • 2002/04 - 2010/03  Civil and Environmental Engineering, Kinki UniversityAssistant Professor
  • 2005/04 - 2006/03  The University of British ColumbiaVisiting Researcher
  • 1999/04 - 2002/03  Civil Engineering, Kinki UniveristyAssociate Researcher

Education

  • 1996/04 - 1999/03  Osaka University  Graduate School, Division of Engineering  Doctor Course of Civil Engineering
  • 1994/04 - 1996/03  Osaka University,  Graduate School, Division of Engineering  Master Course of Civil Engineering
  • 1990/04 - 1994/03  Kinki University,  Faculty of Science and Engineering,  Department of Civil Engineering

Association Memberships

  • 日本工学教育協会   ACI   日本材料学会   日本鋼構造協会   日本コンクリート工学会   土木学会   

Published Papers

  • Study on mechanical properties of SBH500 and its load-carrying capacity as outstanding plates
    Ryosuke Yamazaki; Masahide Matsumura; Hiroshi Higashiyama; Katsuyoshi Nosaka; Tomomi Yagi; Kiyoshi Ono
    Steel Construction Engineering 31 (121) 127 - 142 2024/03 [Refereed]
  • Shear strength of polypropylene fiber reinforced concrete under direct shear test
    Tsuneji Sasaki; Hiroshi HIgashiyama; Mutsumi Mizukoshi; Ryosuke Takahara
    Cement Science and Concrete Technology 77 425 - 432 2024/03 [Refereed]
  • Verification of a correction method for deflection of bridge RC slabs measured with a falling weight deflectometer
    Hiroshi Higashiyama; Hiroki Akamatsu; Masaya Tsukamoto; Hiroyuki Ogawa
    Journal of JSCE Japan Society of Civil Engineers 11 (1) 1 - 13 2023/07 [Refereed]
     
    The falling weight deflectometer (FWD) test, an effective and quantitative method, has been used to evaluate the soundness of road bridge slabs. In FWD tests using an impact load acting on asphalt con-crete paved on the slabs, the measured deflection includes deformation of the asphalt concrete and is in-fluenced by its stiffness. For periodic inspections and soundness evaluation, it is essential to eliminate the influence of temperature-dependent asphalt concrete from the measured deflection. The authors have analytically investigated a method for correcting such influence, including average temperature estima-tion inside asphalt concrete. However, the correction method proposed remains experimentally unveri-fied. In this study, simulated RC slabs were constructed to verify the influence of the asphalt concrete and the accuracy of the correction method. The results verify the accuracy of the correction method in the winter season. However, the accuracy tends to decrease in the summer season, particularly for thick asphalt concrete with high average inside temperature.
  • Flexural behavior and repair of RC beams with horizontal crack injected resin
    NING Weichen; 東山浩士
    コンクリート工学年次論文集 Japan Concrete Institute 45 (2) 295 - 300 2023/07 [Refereed]
  • ポリプロピレン繊維およびフライアッシュを用いた舗装用コンクリートに関する検討
    佐々木庸志; 東山浩士; 水越睦視; 山田 優; 高原良輔; 山内博一
    舗装 58 (4) 12 - 17 2023/04 [Refereed]
  • Mechanical properties of continuous composite girder with steel pale-concrete composite deck stiffened with multi-functional projections rib
    K. Iwata; S. Nakagawa; R. Katsuki; Y. Koeda; S. Matsui; H. Higashiyama
    Journal of Structural Engineering Japan Society of Civil Engineers 69A 395 - 405 2023/03 [Refereed]
     
    In recent years, the fatigue durability of steel plate concrete composite decks has been evaluated by the wheel trucking test in Japan. The composite decks are applied to continuous steel twin-girder bridges and U-shaped steel girder bridges. Slabs are played important roles as a structural element. In order to study the behaviors of the continuous composite girder with the composite deck, a static loading test for the mid-supporting point area specimen was conducted. Furthermore, threedimensional finite element analyses for the specimens were carried out to compare with the measured values of the static loading test, and to evaluate stress distribution of concrete and longitudinal re-bars.
  • Study on design bending moment of road bridge slabs - Case of the direction of slab span is perpendicular tto the direction of vehcle travel -
    H. Higashiyama; K. Kubo; N. Okubo; K. Kirikawa
    Journal of Structural Engineering Japan Society of Civil Engineers 69A 126 - 138 2023/03 [Refereed]
     
    The aims of this study are to propose the design bending moment equations and the minimum slab thickness. In the present specifications for highway bridges, the design bending moment of reinforced concrete slabs has been established among limited parameters such as the design concrete strength and the slab thickness. In this study, the design bending moments were considered with various slab thicknesses for rational slab design method from the elastic finite element analysis. Also, the minimum slab thickness was decided based on the bending strength of concrete considering a size-effect law. In the comparison to the specifications for highway bridges and the JSCE design code Part B, it was found that the design bending moment in the direction of distribution bar is necessary to increase.
  • Fundamental Study on Concrete Pavement Using Polypropylene Fiber and Fly Ash
    T. Sasaki; H. Higashiyama; M. Mizukoshi; A. Fujimori
    Journal of the Society of Materials Science, Japan The Society of Materials Science, Japan 72 (2) 131 - 138 2023/02 [Refereed]
     
    The purposes of this study are to examine the applicability of polypropylene fiber reinforced concrete (PPFRC) to new pavements mixed with fly ash expecting a long-term improvement of durability and a reduction of CO2 emissions. In the field of concrete pavement, there are many studies on steel fiber reinforced concrete pavements in which steel fibers are mixed into concrete for the purpose of improving the mechanical properties. Polypropylene fibers also enable to improve the bending toughness of concrete. On the other hand, in the construction sector, a large amount of CO2 is emitted during the production of cement. The reduction of CO2 emissions is an urgent task in the world. It can be reduced by replacing a part of cement with fly ash as one of the alternative materials. In this study, first, the fly ash substitution for concrete pavement was evaluated. Second, the compressive strength and flexural strength tests were carried out on PPFRCs. Using the bending test results, the tension softening curves of PPFRC were inversely calculated and determined. Finally, the pavement thickness was calculated taking into account the residual flexural strength and the size effect, and the reduction of CO2 emissions was also estimated. Consequently, the PPFRC is able to use for the concrete pavement on the mechanical and environmental benefits.
  • T. Sasaki; H. Higashiyama; M. Mizukoshi
    ACI Materials Journal American Concrete Institute 120 (1) 219 - 229 0889-325X 2023/01 [Refereed]
     
    Beam specimens of polypropylene fiber-reinforced concrete (PPFRC) with 1.3 vol. % having three different sizes, 100 x 100 x 400 mm, 150 x 150 x 530 mm, and 200 x 200 x 650 mm, were tested under four-point bending tests to investigate the flexural behavior (flexural and post-cracking strengths). The beam specimens were quarried from PPFRC slabs to evaluate the influence of the fiber orientation and distribution and the concrete casting and loading directions on the flexural behavior. The test results show that the difference in the fabrication methods of specimens considerably affected the flexural behavior. The flexural cracking strength was accompanied by the size effect and the post-cracking strength, significantly decreased when compared with standardized prism specimens; however, the post-cracking strength was not sensitive to the size effect. Furthermore, the pavement thickness of PPFRC was compared with that of plain concrete with the calculation using the post-cracking strength.
  • Extension of Measurements for Bridge Slab Deflection by Using FWD
    赤松宏紀; 塚本真也; 東山浩士; 小柴正行
    第22回コンクリート構造物の補修，補強，アップグレードシンポジウム論文報告集 22 2022/10 [Refereed]
  • 鋼板厚を考慮した鋼コンクリート合成床版のずれ止め試験方法
    中本啓介; 鈴木 統; 松村寿男; 東山浩士
    第12回道路橋床版シンポジウム論文報告集 341 - 346 2022/10 [Refereed]
  • KL-C継手を有する道路橋床版の耐久性に関する実験的検討
    澤田純之; 工藤朗太; 内田雅博; 今田遙介; 東山浩士
    第12回道路橋床版シンポジウム論文報告集 159 - 164 2022/10 [Refereed]
  • 道路橋RC床版の最小版厚および曲げモーメントに関する一考察
    東山浩士; 久保圭吾; 大久保宣人; 桐川 潔
    第12回道路橋床版シンポジウム論文報告集 353 - 358 2022/10 [Refereed]
  • FWDを用いた道路橋RC床版のたわみ測定後の補正方法に関する一検証
    東山浩士; 澤下七海; 西川翔大; 赤松宏紀; 塚本真也; 小河浩幸
    第12回道路橋床版シンポジウム論文報告集 99 - 104 2022/10 [Refereed]
  • 軽量骨材および使用済み碍子細骨材を用いたコンクリート充填角形鋼管部材の曲げ特性に関する基礎的研究
    上中宏二郎; 水越睦視; 東山浩士
    コンクリート工学年次論文集 44 (2) 667 - 672 2022/07 [Refereed]
  • Repair effect and ultimate load-carrying capacity of reinforced concrete beams with steel plate bonding quarried from existing bridge slabs by re-injection of resin
    T. Kurayanagi; H. Higashiyama; S. Morimoto; S. Hiro; A. Yosida
    Journal of Structural Engineering, JSCE Japan Society of Civil Engineers 68A 765 - 775 2022/03 [Refereed]
     
    The aims of this study are to investigate the repair effect and the ultimate loadcarrying capacity of beam specimens, which were quarried from removed deck slabs with steel plate bonding. From the four-point bending test, the structural behavior and the load-carrying capacity of four specimens with and without steel plate bonding, three of them were repaired by the re-injection of resin, were compared and analyzed with structural calculation. The test results showed that the specimen, which was pre-loaded and induced bending cracks, recovered the bending stiffness and the load-carrying capacity after the re-injection of resin. Finally, the specimen reached the ultimate state due to the debonding of interface between the steel plate and the resin.
  • Wheel running fatigue test for steel plate-concrete composite deck using peculiar shape ribs with multi-functional projections
    K. Iwata; Y. Koeda; K. Iguchi; R. Katsuki; S. Matsui; H. Higashiyama
    Journal of Structural Engineering, JSCE Japan Society of Civil Engineers 67A 769 - 778 2021/03 [Refereed]
     
    The authors have proposed an innovative steel plate-concrete composite deck, of which stiffening lateral ribs were changed from flat plates into peculiar shape ribs and studs were completely eliminated. The new lateral ribs welded on a steel plate have multi-functional projections. The rib has projections along upper and lower edges formed by hot rolling to increase punching shear capacity of the composite deck and also small vertical projections with close pitch between the upper and the lower projections to work shear connectors between the bottom steel plate and the concrete. To make clear the structural behaviors, especially improvement of the fatigue durability, the wheel running fatigue test and analytical investigation were carried out and the definite advancement of fatigue durability was obtained by the changing rib shape.
  • Temperature predition of asphalt concrete and correction method of deflection on bridge slabs for FWD testing
    H. Higashiyama; M. Tsukamoto; H. Mashito
    Journal of JSCE, E1: Pavement Engineering Japan Society of Civil Engineers 9 (1) 148 - 160 2021/03 [Refereed]
     
    The authors have investigated the soundness evaluation of existing reinforced concrete (RC) slabs supported by girders using deflection at a loading point and an integrated deflection area through falling weight deflectometer (FWD) tests. In FWD tests, an asphalt concrete layer deforms locally around a loading point under an impact load. The deflection of RC slabs thus needs to be determined with an appropriate correction method. This study proposes an equation to determine the average temperature of asphalt concrete layer using a regression analysis with measured results. The results show that the proposed equation can accurately predict the average temperature by incorporating a one-hour difference in asphalt concrete surface temperature. Furthermore, the correction method of deflection using the average temperature during FWD tests proposed was analytically verified for asphalt concrete layers with temperature gradients throughout the depth. The influence of temperature gradients in correcting the deflection was also noted to be small and the previously proposed correction method was applicable to determine the deflection of RC slabs in FWD tests.
  • Tensile behavior and strength of steel plate bonded with UV-curable glass fiber reinforced polyester resin sheet on both sides
    H. Higashiyama; T. Ishikawa; N. Mitsukawa; T. Nagao; O. Takahashi
    International Jounal of GEOMATE The GEOMATE International Society 20 (79) 1 - 8 2021/03 [Refereed]
     
    Steel structures in social infrastructures often undergo corrosion and the thickness of these steel plates decreases. Then, the strength of steel structures decreases according to the residual plate thickness. Applications of a steel plate attaching method and a fiber reinforced polymer/plastic (FRP) bonding method are effective for repair and strengthening for these steel structures. In this study, UV-curable glass fiber reinforced polyester resin (UV-GFRPR) sheet was focused instead of FRPs. The aims of this study are to confirm repair and strengthening effects of the UV-GFRPR sheet bonded on both sides of steel plate. The UV-GFRPR sheet consists of a polyester resin and chopped glass fibers and is hardened by radiation of UV source for a certain time. The tensile behavior and strength of steel plate bonded with UV-GFRPR sheets were assessed under axial tensile load. After that, the tensile behavior and strength of specimens were numerically estimated from each stress-strain curve of UV-GFRPR and steel modeled by using Menegotto-Pinto model. Furthermore, nonlinear finite element analysis (FEA) taking into account of the properties of bond layers was carried out to compare the numerical results. From the test results, the yield and ultimate strengths of specimens increased linearly according to the number of laminated layers of UV-GFRPR. Both results of the numerical calculation and the FEA agreed well with the test results. It is concluded that the numerical calculation without the contribution of bond layers can estimate the tensile behavior and strength of steel plate bonded with UV-GFRPR on both sides.
  • 下面増厚工法で補強された大垣橋ＲＣ床版の追跡調査と25年後の補強効果について
    大久保誠; 石井保; 松井繁之; 東山浩士; 財津公明; 三ツ井達也
    第11回道路橋床版シンポジウム論文報告集 203 - 208 2020/10 [Refereed]
  • 軽量プレキャスト合成床版の鉄筋継手構造に関する実験的研究
    滝本和志; 田中博一; 朱 暁旭; 大久保宣人; 山本将志; 東山浩士
    第11回道路橋床版シンポジウム論文報告集 87 - 92 2020/10 [Refereed]
  • FWDを用いた床版の健全度判定方法に関する一提案
    東山浩士; 塚本真也; 増戸洋幸
    第11回道路橋床版シンポジウム論文報告集 35 - 40 2020/10 [Refereed]
  • Properties of an innovative shear connector in a steel-concrete composite slab
    Xiaoxu Zhu; Kazushi Takimoto; Hirokazu Tanaka; Nobuhito Okubo; Hiroshi Higashiyama
    Journal of Constructional Steel Research Elsevier 172 106165-1 - 106165-15 2020/09 [Refereed]
     
    The number of aging bridges in Japan is increasing, and steel-concrete composite slabs are commonly used in replacement work due to their durability and associated savings in construction time. Due to the limited capacities of existing bridge columns, replacement of the old bridge deck with a lightweight alternative is preferable. This study proposes an innovative steel-concrete composite slab with a thickness of 180 mm consisting of lightweight aggregate concrete (LWAC) and rectangular steel pipes (RSPs) as a new type of shear connector. The total weight could be reduced by about 20% from that of steel-concrete composite slabs. To investigate the shear properties of RSP, a push-out test was conducted on three specimens with static loading and five with fatigue loading. The static experimental results showed that the shear capacity of the RSPs could be determined by cracks, which occurred near the weld zone. Two failure patterns, RSP cracks and weld separation, were observed in the different specimens under fatigue loading. The static shear capacity was compared with the calculated results using different C-shaped and L-shaped channel specifications, and a headed stud number equivalent to one RSP was proposed. The S\\N curve of RSP was compared with that of the headed studs, and the fatigue performance appeared to be better than that of the studs when the shear stress was below 125 MPa. The changing trend in the slip rate and the normalised stiffness of the RSP when the fatigue loading cycles increased were investigated and formulated.
  • Tensile properties of steel plate bonded with UV-curable glass fiber reinforced polyester resin sheet
    N. Mitsukawa; T. Nagao; O. Takahashi; H. Higashiyama; T. Ishikawa
    The Sixth Internantional Conference on Construction Materials, ConMat’20 525 - 532 2020/08 [Refereed]
  • 超速硬PVA繊維補強軽量コンクリート2種の床版上面増厚工法への適用性の検討
    水越睦視; 東山浩士; 神田利之; 真鍋 隆
    コンクリート工学年次論文集 42 (2) 1123 - 1128 2020/07 [Refereed]
  • Analytical Study on Horizontal Shear Force Acting on Shear Connectors in Steel-Concrete Composite Bridge Decks
    東山浩士; 大久保宣人; 春日井俊彦; 久保圭吾
    鋼構造論文集 Japanese Society of Steel Construction 27 (105) 99 - 104 2020/03 [Refereed]
     
    Horizontal shear force acting on shear connectors in steel-concrete composite bridge decks has been basically designed by using Design Code for Steel Structures PART B so far. However, Specifications for Highway Bridges were revised in 2017 and the design load condition became different between them. In this study, shear force was analyzed by using elastic FE programs when T-type loads specified in the Specifications for Highway Bridges were applied on steel-concrete composite bridge decks. From the analytical results, the maximum shear force was presented at each loading position. Furthermore, from case studies, sharing ratio of the horizontal shear force acting on headed stud connectors was determined.
  • Fatigue strength of headed studs under rotational shear loading focussing on weight reduction of steel-concrete composite bridge deck
    K. Yoshida; H. Higashiyama; H. Ogomori; S. Matsui
    Proceedings of 5th International Conference on Science, Engineering and Environment 378 - 383 2019/11 [Refereed]
  • Fatigue strength of headed studs welded with improved ferrule in concrete under cyclic loading
    H. Higashiyama; Kenji Yoshida; S. Banba; S. Matsui
    Proceedings of 5th International Conference on Science, Engineering and Environment 285 - 290 2019/11 [Refereed]
  • FWDによる道路橋床版の健全度評価手法に関する検討
    増戸洋幸; 梅田 隼; 塚本真也; 東山浩士
    第19回コンクリート構造物の補修，補強，アップグレード論文報告集 19 623 - 628 2019/10 [Refereed]
  • Hiroshi Higashiyama; Yuta Deguchi; Koichi Nakatsuji; Shinichi Igarashi; Osamu Kawakami; Yu Nagame
    材料 68 (7) 584 - 589 2019/07 [Refereed]
  • Kenji Yoshida; Hiroshi Higashiyama; Satoshi Banba; Hiroshi Kaido; Shigeyuki Matsui
    Journal of the Society of Materials Science, Japan The Society of Materials Science, Japan 68 (6) 463 - 469 2019/06 [Refereed]
     
    In a Robinson type steel-concrete composite deck, headed studs and rib plates are usually welded on its bottom steel plate. The authors have investigated a welding ferrule to realize improved headed studs with higher durability. In contrast, the weight of bottom steel plate generally occupies about 55% in a whole weight of the Robinson type steel-concrete composite deck. On the bottom steel plate welded with rib plates, the thickness of bottom steel plate such as 8mm or 9mm is usually used, because there is concern about its thermal deformation in welding. A cold tandem welding method, which is recently used, can reduce heat input and suppress the thermal deformation of the bottom steel plate. Then, it has been possible to adopt a thinner steel plate such as 6mm to the bottom steel plate. To achieve a rational fatigue design, the tensile fatigue strength of such a thin steel plate welded with headed studs or rib plates has to be evaluated. The aim of this study is to compare the tensile fatigue strengths of a steel plate welded with each conventional and improved headed stud or a rib plate with the fatigue design recommendations of JSSC. From the fatigue test results, it was confirmed that the fatigue strengths of the steel plate welded with each conventional and improved headed stud satisfied E-grade of JSSC. Furthermore, the steel plate welded with a rib plate also satisfied E-grade of JSSC.
  • H. Higashiyama; H. Inoue; M. Sappakittipakorn
    International Journal of GEOMATE The GEOMATE International Society 15 (52) 222 - 229 2018/12 [Refereed]
     
    In the field of road engineering, cool pavements are used to decrease the surface temperature and improve the road environment. A surface-temperature reducing pavement was previously developed using a cement-based grouting material containing cement, ceramic waste powder, and natural zeolite. From the temperature measurements, it was revealed that the surface temperature was lower by 15-20°C than the porous asphalt pavement at 60°C. The pavements can undergo rutting under passing traffic loads and aggregate fretting in the hot summer season, lowering serviceability and traffic safety. Fatigue tests under a fixed-point load were conducted to evaluate the fatigue resistance of the surface-temperature reducing pavement at 40°C imitating the hot summer season. In this study, fatigue tests under a fixed-point load at 30°C imitating the spring or autumn season were carried out to evaluate the fatigue resistance against the rutting. Furthermore, the aggregate fretting tests were carried out to evaluate the aggregate fretting resistance at temperatures of 50°C and 30°C. The test results showed that the surface-temperature reducing pavement has higher fatigue and aggregate fretting resistance than the porous asphalt pavement.
  • 上面増厚後に水平ひび割れが発生したRC床版の補修工法に関する試験施工
    鈴木 真; 神田利之; 松井隆行; 東山浩士
    第10回道路橋床版シンポジウム論文報告集 237 - 242 2018/11 [Refereed]
  • 角形鋼管を用いた軽量プレキャスト鋼コンクリート合成床版の開発
    滝本和志; 田中博一; 朱 暁旭; 大久保宣人; 山本将志; 東山浩士
    第10回道路橋床版シンポジウム論文報告集 183 - 188 2018/11 [Refereed]
  • FWDを用いたRC床版の健全度評価における舗装たわみの温度補正に関する解析的検討
    東山浩士; 増戸洋幸; 塚本真也; 阿部長門; 関口幹夫
    第10回道路橋床版シンポジウム論文報告集 249 - 254 2018/11 [Refereed]
  • M. Sappakittipakorn; P. Sukontasukkul; H. Higashiyama; P. Chindaprasirt
    Construction and Building Materials Elsevier 186 1247 - 1255 2018/10 [Refereed]
     
    In this study, the effects of fiber on the properties of polymer modified concrete (PMC) were investigated. Hooked end steel fibers with two different lengths but similar aspect ratios were used at 0.5% and 1.0% by volume fraction. Acrylic polymer was added into concrete at 2 different weight ratios, 7.5% and 15% by weight of cement. Four experiments were carried out: slump, compression, flexural and water penetration tests. Results indicated that both fiber content and length, and polymer content played an important role on the properties of fiber reinforced polymer modified concrete (FRPMC) in different ways. In term of workability, the slump increased with the increasing polymer content and decreased when the fiber was added into PMC. For mechanical properties, fiber addition enhanced the load response of PMC and increased the strength and fracture toughness. In term of compressive strength, regardless of PCM type, the strength of FRPMC was found to increase up to about 15% as compared to plain PCM. The effect of fibers was more pronounced under bending load than under compression. The increase in flexural load up to 34% was observed in FRPMC as compared to plain PMC. For water penetration test, fiber at low volume fraction had a negligible effect on the water tightness. However, when the fiber volume fraction was increased to 1.0%, the water tightness was reduced significantly.
  • 平井俊樹; 東山浩士; 仲辻浩一; 五十嵐心一; 永目 有; 出口祐太
    材料 67 (10) 904 - 910 2018/10 [Refereed]
  • 吉田賢二; 東山浩士; 馬場 敏; 松井繁之
    土木学会論文集（A1：構造・耐震工学） 74 (3) 306 - 318 2018/09 [Refereed]
  • 角鋼管のずれ止め性能に関する実験的研究
    朱 暁旭; 滝本和志; 大久保宣人; 東山浩士
    コンクリート工学年次論文集 40 (2) 1165 - 1170 2018/07 [Refereed]
  • プレキャスト床版の継手構造に関する実験的研究
    滝本和志; 田中博一; 山本将志; 東山浩士
    コンクリート工学年次論文集 40 (2) 577 - 582 2018/07 [Refereed]
  • Hiroshi Higashiyama; Hiroyuki Mashito; Masaya Tsukamoto; Nagato Abe; Mikio Sekiguchi; Teruyuki Nagami
    International Journal of GEOMATE GEOMATE International Society 15 (51) 106 - 112 2186-2982 2018 [Refereed]
     
    In proper maintenance for bridge slabs, deflection measurement of bridge slabs by falling weight deflectometer (FWD) is one of the soundness evaluation methods. The FWD is the non-destructive testing method for obtaining the slab deflections in-situ. In this research, we focused on the deflection area calculated from the deflection measurement as one of the soundness evaluation indexes for the bridge slabs and investigated it by elastic finite element (FE) analysis based on the thin plate theory simulating the fatigue damage by changing the flexural rigidity of reinforced concrete (RC) slabs. As the results, the deflection area in the transverse direction to the bridge axis correlated well with the deflection at the loading point, and the deflection area in the longitudinal direction was also found to be a good correlation with the deflection at the loading point by limiting its calculation length considering the characteristic of deflection curve. These relationships were similar not only in the simply supported slabs but also in the continuously supported slabs. Furthermore, in order to verify the analytical results, the deflection measurement was carried out on actual bridge slabs newly constructed. Then, the measured results had the same trend with the analytical results.
  • Toshiki Hirai; Hiroshi Higashiyama; Koichi Nakatsuji; Sinichi Igarashi; Yu Nagame; Yuta Deguchi
    Journal of the Society of Materials Science, Japan Society of Materials Science Japan 67 (1) 121 - 128 1880-7488 2018/01 [Refereed]
     
    Post-installed anchors are used in many existing concrete structures to construct additional members. The purpose of this study is to investigate the pull-out behavior of a post-installed adhesive anchor under pull-out load. The post-installed adhesive anchor, which is employed with the epoxy resin to obtain the chemical bonding, has been newly developed. In this study, the single adhesive anchor was installed into concrete which was cast in steel pipes and into concrete slabs. The test parameters were the embedment length and concrete strength. From the results of the pull-out test, the bond strength related to the concrete strength without the embedment length. As the mechanical and chemical resistances of the adhesive anchor, the bond strength was highly obtained in comparison with the common adhesive anchors. Furthermore, the pull-out and torque tests were carried out on concrete slabs. From the test results, the ultimate tensile load linearly related to the torque. This relation can be employed for the inspection of the post-installed adhesive anchor after construction.
  • FWDによる道路橋床版の健全度評価指標の一提案
    東山 浩士; 塚本真也; 阿部長門; 関口幹夫
    第17回コンクリート構造物の補修，補強，アップグレード論文報告集 (17) 273 - 278 2017/10 [Refereed]
  • Surface temperature of asphalt pavements with colored cement-based grouting materials containing ceramic waste powder and zeolite
    H. HIGASHIYAMA; M. Sano; F. Nakanishi; M. Sugiyama; M. Kawanishi; S. Tsukuma
    International Journal of Civil, Environmental, Structural, Construction and Architectural Engineering 11 (8) 936 - 942 2017/08 [Refereed]
  • 上面増厚工法施工後に劣化したRC床版に対する再補修工法の耐疲労性に関する検討
    神田利之; 鈴木真; 樅山好幸; 東山 浩士
    コンクリート工学年次論文集 39 (1) 1741 - 1746 2017/07 [Refereed]
  • Hiroshi Higashiyama; Masanori Sano
    International Journal of GEOMATE GEOMATE International Society 13 (35) 166 - 173 2186-2982 2017 [Refereed]
     
    Asphalt and concrete pavements cover a high percentage of urban area. In the summer season, the surface temperature of asphalt pavements exposed to the solar radiation increases to 60°C or more. This is one cause of the urban heat island phenomenon. In the field of road engineering, cool pavements have been constructed to decrease the surface temperature and to improve the road environment. We have previously studied the cement-based grouting material containing cement, ceramic waste powder, and natural zeolite for cool pavements. This cool material is poured into voids in porous asphalt pavements. The construction method for this cool pavement is the same as that for water retaining pavements. The temperature measurements show that the surface temperature was lower by 15-20°C than the conventional porous asphalt pavement temperature of 60°C. On the other hand, the accumulation of permanent strain in the asphalt pavements causes rutting under passing traffic loads in the hot summer season. In this study, the fatigue tests under a fixed-point load were conducted to evaluate the fatigue resistance of the surface temperature reducing pavement at 40°C. The fatigue resistance of pavements under various loading levels is evaluated at sinking displacements of 15 and 20 mm. The test results show that the surface temperature reducing pavement has a higher fatigue resistance than conventional porous asphalt pavements.
  • Characteristics of chloride diffusion and pore volume in ceramic waste aggregate mortar containing GGBS
    H. Higashiyama; M. Sappakittipakorn; M. Mizukoshi; O. Takahashi
    Intenrnational Journal of GEOMATE 11 (26) 2568 - 2575 2016/10 [Refereed]
  • 上面増厚工法施工後に界面剥離により劣化したRC床版の補修工法に関する試験的研究
    鈴木 真; 樅山好幸; 神田利之; 東山浩士
    第16回コンクリート構造物の補修，補強，アップグレード論文報告集 16 645 - 650 2016/10 [Refereed]
  • Effect on surface temperature reduction of asphalt pavement with cement-based materials containing ceramic waste powder
    H. Higashiyama; M. Sano; F. Nakanishi; O. Takahashi; S. Tsukuma
    International Journal of Civil, Environmental, Structural, Construction and Architectural Engineering 10 (8) 1014 - 1020 2016/08 [Refereed]
  • Hiroshi Higashiyama; Masanori Sano; Futoshi Nakanishi; Osamu Takahashi; Shigeru Tsukuma
    Case Studies in Construction Materials Elsevier Ltd 4 73 - 80 2214-5095 2016/06 [Refereed]
     
    In the urban area, the heat island phenomenon and hot nights when the temperature does not fall below 25. °C outdoors are becoming environmental problems. Pavements cover a high percentage of the urban area and largely affect the development of the urban heat island phenomenon. The authors have developed water retaining pavements with several cement-based grouting materials poured into voids of open graded asphalt pavements (porous asphalt pavements) to reduce the surface temperature in the hot summer climate. The cement-based grouting materials consist of cement, ceramic waste powder, and fly ash or natural zeolite. In field measurements conducted in the summer season, all of the water retaining pavements reduced the surface temperature by 10. °C and more, when the porous asphalt pavement reached over 60. °C. Especially, one of the water retaining pavements, which uses ultra-rapid hardening cement, ceramic waste powder, and natural zeolite, reduced the surface temperature by about 20. °C. In this paper, the details of the cement-based grouting materials used in the field tests are described. Also, the field test results on the thermal performance of the water retaining pavements are reported.
  • 佐光浩継; 古市 亨; 東山浩士; 松井繁之
    構造工学論文集 62A 1149 - 1159 2016/03 [Refereed]
  • 東山浩士; 佐野正典; 稲岡尚毅; 中西 太; 高橋修; 津熊茂
    舗装 建設図書 51 (1) 19 - 23 0910-6219 2016/01 [Refereed]
  • Mechanical properties and chloride diffusion of ceramic waste aggregate mortar containing ground granulated blast-furnace
    H. Higashiyama; M. Sappakittipakorn; M. Mizukoshi; O. Takahashi
    International Journal of Civil, Environmental, Structural, Construction and Architectural Engineering 9 (9) 843 - 848 2015/09 [Refereed]
  • H. Higashiyama; M. Sappakittipakorn; M. Mizukoshi; O. Takahashi
    Journal of The Society of Materials Science, Japan The Society of Materials Science, Japan 64 (7) 591 - 598 0514-5163 2015/07 [Refereed]
     
    From our previous findings, the recycling of ceramic waste aggregate (CWA) in mortar has been proved an ecological means plus an excellent outcome against chloride ingress. The CWAs were electric porcelain insulator wastes supplied from an electric power company, which were crushed and ground to fine aggregate sizes. In this study, to further develop the CWA mortar as an eco-efficient, ground granulated blast-furnace slag (GGBS) was incorporated. The GGBS was utilized as a supplementary cementitious material (SCM) at three different replacement levels of 15, 30, and 45% by weight of cement. The time dependency of the GGBS on enhancing chloride resistance in the CWA mortars was experimentally assessed by using an electron probe microanalysis (EPMA). The tests were carried out on mortar samples after immersion in 5.0% NaCl solution for 24, 48, and 96 weeks. Another set of the mortar samples was exposed to a laboratory ambient condition for 24, 48, and 96 weeks and then followed with a carbonation test. The resistance to the chloride ingress of the CWA mortar becomes more effective in proportion to the replacement level of the GGBS. Meanwhile, the carbonation depth of the CWA mortar increases with increasing the GGBS. The relationship between the apparent chloride diffusion coefficient and the GGBS replacement level was shown along with the immersion time.
  • Hiroshi Higashiyama; Manote Sappakittipakorn; Masanori Sano; Osamu Takahashi; Shigeru Tsukuma
    JOURNAL OF MATERIAL CYCLES AND WASTE MANAGEMENT SPRINGER 17 (3) 513 - 521 1438-4957 2015/07 [Refereed]
     
    The characteristics of chloride ingress into mortar containing ceramic waste aggregate (CWA) were investigated by using an electron probe micro-analyzer. The CWA was produced from electric porcelain insulator wastes via the processes of crushing and grinding. The CWA mortar in which entire fine aggregate was replaced with the CWA was studied in comparison with typical river sand (RS) mortar. For both mortars, the water to cement ratio (W/C) was varied at 0.4, 0.5, and 0.6. The chloride ingress was introduced to the mortars through the immersion in a 5.0 wt% sodium chloride solution for 24, 48, and 96 weeks. It is clearly evident that the CWA mortar had smaller chloride penetration than the RS mortar. Furthermore, to manifest how the CWA reduced the chloride ingress, either the pore size distribution of the CWA and the RS mortars or the zeta potential on the CWA and the RS particles in a high-alkaline solution simulating the pore solution was conducted. The CWA mortars had much lower pore volume than the RS mortars, whereas the zeta potential of both particles was not markedly different. It was thus indicated that the pore size distribution is of greater influence than the zeta potential.
  • 東山浩士; 佐野正典; 木下孝樹; 吉田章人; 稲岡尚毅
    舗装 建設図書 50 (7) 25 - 30 0910-6219 2015/07 [Refereed]
  • Kojiro Uenaka; Hiroshi Higashiyama
    STEEL AND COMPOSITE STRUCTURES TECHNO-PRESS 18 (2) 467 - 480 1229-9367 2015/02 [Refereed]
     
    The steel-concrete composite decks have high fatigue durability and deformability in comparison with ordinary RC slabs. Withal, the steel-concrete composite deck is mostly heavier than the RC slabs. We have proposed herein a new type of steel-concrete composite deck which is lighter than the typical steel-concrete composite decks. This can be achieved by arranging hollow sectional members as shear connectors, namely, half-pipe or channel shear connectors. The present study aims to experimentally investigate mechanical characteristics of the half-pipe shear connectors under the direct shear force. The shear bond capacity and deformability of the half-pipe shear connectors are strongly affected by the thickness-to-diameter ratio. Additionally, the shear strengths of the hollow shear connectors (i.e., the half-pipe and the channel shear connectors) are compared. Furthermore, shear capacities of the hollow shear connectors equivalent to headed stud connectors are also discussed.
  • ポーラスアスファルト舗装に生じるポットホールに対する補修材の開発および試験方法の提案
    東山浩士; 佐野正典; 木下孝樹; 竹内裕人
    近畿大学理工学部研究報告 (50) 1 - 6 2014/10 [Refereed]
  • 碍子微粉末および石炭灰を有効利用した吸水・半たわみ型アスファルト舗装の検討とその路面温度低減効果
    東山浩士; 佐野正典; 竹内裕人; 稲岡尚毅; 高橋 修
    舗装 49 (9) 18 - 23 2014/09 [Refereed]
  • Development of durable headed studs welded with improved ferrules for steel-concrete composite decks
    H. Higashiyama; K. Yoshida; K. Inamoto; S. Matsui; H. Kaido
    Proceedings of The 9th international Conference on Short and Medium Span Bridges 209-1 - 209-8 2014/07 [Refereed]
  • Hiroshi Higashiyama; Manote Sappakittipakorn; Mutsumi Mizukoshi; Osamu Takahashi
    CEMENT & CONCRETE COMPOSITES ELSEVIER SCI LTD 49 43 - 49 0958-9465 2014/05 [Refereed]
     
    From our previous findings, the recycling of ceramic waste aggregate (CWA) in mortar has been proved an ecological means plus an excellent outcome against chloride ingress. The CVVAs were porcelain insulator wastes supplied from an electric power company, which were crushed and ground to fine aggregate sizes. In this study, to further develop the CWA mortar as an eco-efficient construction material, ground granulated blast-furnace slag (GGBS) was incorporated. The slag (having the Blaine fineness of 6230 cm(2)/g) was utilized as a supplementary cementitious material (SCM) at three different replacement levels of 15%, 30%, and 45% of cement by weight. The efficiency of the GGBS on enhancing chloride resistance in the CWA mortars was experimentally assessed by using a silver nitrate solution spray method and an electron probe microanalysis (EPMA). The tests were carried out on mortar samples after immersed in a 5.0% NaCl solution for 24 weeks. Another set of the mortar samples was exposed to a laboratory ambient condition for 24 weeks and then followed with a carbonation test. The test results indicated that the resistance to the chloride ingress of the CWA mortar becomes more effective in proportion to the replacement level of the GGBS. In contrast, the carbonation depth of the CWA mortar increases with the increase of the GGBS. The activeness of the GGBS was also evaluated on the basis of the compressive strength development up to 91 days. Due to its high fineness, the GGBS can be used up to 30% while the high relative strength (more than 1.0) is achieved at all ages. (C) 2014 Elsevier Ltd. All rights reserved.
  • Hiroshi Higashiyama; Kenji Yoshida; Koji Inamoto; Shigeyuki Matsui; Hiroshi Kaido
    Journal of Constructional Steel Research Elsevier Ltd 101 82  0143-974X 2014 [Refereed]
  • Hiroshi Higashiyama; Kenji Yoshida; Koji Inamoto; Shigeyuki Matsui; Hiroshi Kaido
    JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH ELSEVIER SCI LTD 92 211 - 218 0143-974X 2014/01 [Refereed]
     
    This paper presents an evaluation of the fatigue strength of headed studs welded with improved ferrules under rotating shear force. In steel-concrete composite structures, shear connectors are essential components to transfer shear forces at the interface between steel and concrete. Particularly, headed studs in steel-concrete composite decks for highway bridges are subjected to rotating shear force when vehicle loads pass through the steel-concrete composite decks. The authors have developed welding ferrules for headed studs with higher fatigue duration than conventional headed studs. In this study, the rotating shear force was applied to the improved headed studs by using a specially developed testing machine in order to determine the fatigue strength in association with the concrete strength. The fatigue strength of the headed studs increased with the higher concrete strength and two failure modes were observed. Finally, the average S-N curves in correspondence with concrete strengths were determined for the improved headed studs. (C) 2013 Elsevier Ltd. All rights reserved.
  • Hiroshi Higashiyama; Kiyoshi Yamauchi; Manote Sappakittipakorn; Masanori Sano; Osamu Takahashi
    CONSTRUCTION AND BUILDING MATERIALS ELSEVIER SCI LTD 40 1021 - 1028 0950-0618 2013/03 [Refereed]
     
    In reinforced concrete structures, chloride ingress causes deleterious consequences due to corrosion of steel reinforcement. With no protective means, the service life of the structures is shortened proportionately to the rate of chloride ingress designated as a coefficient of chloride diffusion. Previous experimental study using the rapid chloride migration test has indicated that the use of ceramic waste aggregate (CWA) is effective in lowering the chloride diffusion coefficient of the 0.5 water to cement (W/C) ratio mortars and thus making mortars more durable. In this study, further experiments were conducted to seek visual evidences of the inhibiting of chloride ingress in the CWA mortars using a silver nitrate (AgNO3) solution spray method and an electron probe microanalysis (EPMA) after 24 weeks submersion in 5.0 wt.% sodium chloride solution. The CWAs tested at this time were electrical porcelain insulator wastes from an electric power company, which were crushed and ground in a recycle plant. In particular, the test program was extended to investigate the CWA mortars at a wider range of W/C ratios, i.e. 0.4, 0.5, and 0.6. All the CWA mortars were also compared with their counterpart mortars made of typical river sand (RS). It is visually found that, at the W/C ratio of 0.4, 0.5, and 0.6, the CWA mortar is more effective in resisting chloride ingress (having lower coefficient of apparent chloride diffusion) than the RS mortar. Moreover, the compression test was carried out. It is worth noting that the CWA has no adverse effect on the compressive strength of mortars in relation to river sand. (C) 2012 Elsevier Ltd. All rights reserved.
  • 水越睦視; 東山 浩士; 山本光
    Cement Science and Concrete Technology セメント協会 99 584 - 591 2013/02 [Refereed]
  • Hiroshi Higashiyama; Manote Sappakittipakorn; Kiyoshi Yamauchi; Osamu Takahashi
    ISEC 2013 - 7th International Structural Engineering and Construction Conference: New Developments in Structural Engineering and Construction Research Publishing Services 633 - 638 2013 [Refereed]
     
    From a socio-economic sustainability point of view, a recycling of wastes as aggregates in cement-based materials has been noted a remarkable method. Ceramic wastes, which are discarded not only from ceramic industries but also electric power companies, are one of the materials possibly recyclable as aggregates. In this study, porcelain insulator wastes discarded from an electric power company are used as fine aggregate for mortar through the process of crushing and grinding. The aim of this study is to investigate the effectiveness of ceramic waste aggregate (CWA) in mortar on compressive strength and chloride ion penetration at different fine aggregates, at different quantity, and at various replacement ratios. From the experimental results, it was found that the CWA mortar was superior to either river sand or silica sand mortars. The compressive strength of the CWA mortar was higher than that of the river sand mortar and linearly increased with increasing the replacement ratio of the CWA. In addition, the chloride ion penetration depth linearly decreased with increasing the replacement ratio of the CWA.
  • Hiroshi Higashiyama; Manote Sappakittipakorn; Masanori Sano; Fumio Yagishita
    CONSTRUCTION AND BUILDING MATERIALS ELSEVIER SCI LTD 33 48 - 54 0950-0618 2012/08 [Refereed]
     
    In this study, the chloride ion penetration tests on mortars made of ceramic waste aggregates (CWAs) was conducted by using a silver nitrate (AgNO3) solution spray method and a rapid chloride migration test (steady-state condition). The CWAs used in the experiment are ceramic electrical insulator wastes supplied by an electric power company in Japan, which were crushed and ground to various sizes prior to the replacement of fine aggregates. The influence of the CWAs was evaluated through the tests on four series of mortar as follows: (1) mortars made of different fine aggregates, (2) mortars made of the CWA having a different range of particle sizes, (3) mortars made of the CWA at a different quantity, and (4) mortars made of the CWA at a different replacement ratio. From the experimental results, it is found that the CWA mortars are more effective in the resistance of chloride ion penetration than a typical mortar made of river sand. The depth of chloride ion penetration in the CWA mortars is decreased either when the amount of the CWA is increased or the particle size of the CWA is decreased. In addition, the effective chloride diffusion coefficient of the CWA mortar is lower than that of the river sand mortar. (C) 2012 Elsevier Ltd. All rights reserved.
  • Yoshida Kenji; Inamoto Koji; Matsui Shigeyuki; Higashiyama Hiroshi; Kaido Hiroshi
    Kozo Kogaku Ronbunshu. A (Journal of Structural Engineering. A) Japan Society of Civil Engineers 58A 906 - 916 1881-820X 2012/03 [Refereed]
     
    Robinson type composite deck in which concrete and base steel plate are connected by headed studs is typical and major among composite decks in Japan. As the fatigue durability of the composite deck mainly depends on the fatigue strength of studs, the authors have developed an improved welding ferrule for the stud. The ferrule has upper grooves to spout out shield gas at welding and has a closed skirt to store melted metal and to make the welded bead shape of the stud smooth. In this paper, shear-tensile fatigue tests and rotating shear force fatigue tests were carried out to certify the effect of improvement. Consequently, the authors have confirmed its superior durability over the conventional studs.
  • H. Higashiyama; T. Nakayama; M. Kimura; T. Sakamoto; S. Matsui
    BRIDGE MAINTENANCE, SAFETY, MANAGEMENT, RESILIENCE AND SUSTAINABILITY CRC PRESS-TAYLOR & FRANCIS GROUP 3154 - 3161 2012 [Refereed]
     
    Railway sleepers are directly mounted on the upper flange of main steel girders and/or steel stringers. The upper flange is easily exposed to wet condition under the railway sleepers with rain and is thus under corrosive environment. Furthermore, blowing dust including small particles of sand affects the corrosion as a polisher on railway bridges especially across a river. To overcome this problem, durable corrosion protecting materials under the railway sleepers are needed to insure a longer life of railway steel bridges. In this study, three types of corrosion protecting material were investigated: a paint coating of B-7 generally employed on railway steel bridges; an epoxy coated glass fiber sheet; and an epoxy coated carbon fiber sheet. The results indicate that the epoxy coated glass fiber sheet and the epoxy coated carbon fiber sheet have significantly higher durability than the B-7.
  • Hiroshi Higashiyama; Fumio Yagishita; Masanori Sano; Osamu Takahashi
    CONSTRUCTION AND BUILDING MATERIALS ELSEVIER SCI LTD 26 (1) 96 - 101 0950-0618 2012/01 [Refereed]
     
    This paper presents the results of experimental investigation on compressive strength and resistance to chloride ion penetration of mortars made of ceramic waste as fine aggregate. The ceramic waste of electrical insulators provided from an electric power company in Japan has been crushed and ground to produce fine aggregates for mortars in this study. In the process of crushing and grounding, ceramic powder is discharged as a by-product. The effects of mixing with the ceramic powder in mortars have been also investigated. Compression tests of mortars are conducted at 7, 28 and 91 days curing. Moreover, the resistance to chloride ion penetration of mortars has been determined by two methods: the spraying of a 0.1 N silver nitrate solution and the X-ray fluorescence spectrometry. The compressive strength of mortar made of the ceramic waste aggregate increases and the resistance to chloride ion penetration is significantly higher in comparison with mortar made of the river sand. It is also confirmed that a partial replacement of cement by the ceramic powder up to 20% by weight is effective with respect to the compressive strength and the resistance to chloride ion penetration. (C) 2011 Elsevier Ltd. All rights reserved.
  • 高靭性PCM吹付け下面増厚補強はりの破壊形態に及ぼす増厚材料の種類と補強鉄筋量の影響
    水越,榊原; 東山,松井
    コンクリート工学年次論文集 33 (2) 1327 - 1332 2011 [Refereed]
  • PAE系ポリマーセメントモルタルを用いた補強はりのせん断耐力
    西原,中井; 水越,東山
    コンクリート工学年次論文集 33 (2) 1375 - 1380 2011 [Refereed]
  • H. Higashiyama; A. Ota; M. Mizukoshi
    International Journal of Concrete Structures and Materials 5 (1) 35 - 42 2011 [Refereed]
  • YONEDA Masahiro; HIGASHIYAMA Hiroshi
    Journal of Jsee Japanese Society for Engineering Education 58 (5) 84 - 89 1341-2167 2010/09 [Refereed]
     
    This paper describes the perception about the present state of structural mechanics education and a trial to improve the motivation for learning of students learning in the civil and environmental engineering department, Kinki University. The resultant score of structural mechanics is examined with various factors such as the type of entrance examination, the percentage of attendance and the learning time, etc. Based on the information obtained by questionnaires for a job, it is found that the civil service is the most popular among every job for students learning in our department. We propose the new questionnaire survey by using the national service personnel examination for second-class civil to improve the effectiveness of the civil engineering education. It seems that this trial might be one of the useful techniques to improve the motivation for learning of students in the civil engineering.
  • HIGASHIYAMA Hiroshi; ISHIKAWA Toshiyuki; UENAKA Kojiro
    Proc. of the 5th Civil Engineering Conference in the Asian Region The Society of Materials Science, Japan 58 (11) 937 - 942 0514-5163 2010/08 
    Steel and concrete composite deck, which is arranged channel shape steel members in the transverse direction on the top surface of the bottom steel plate, has been investigated by the authors. By the arrangement of channel shape steel members welded to the bottom steel plate, the steel and concrete composite deck with cellars in the concrete becomes to be more lightweight than typical types of steel and concrete composite decks. For highway bridge decks, it is very important to verify the fatigue strength of the welded joint. In this paper, fatigue tests of the welded joint between the channel shape steel and the bottom steel plate were carried out under the tensile fatigue stress.
  • 東山,松岡; 栁下,佐野; 酒井,高橋
    Journal of Japan Institute of Aggregate Technology 骨材資源工学会 42 (167) 115 - 122 0286-9179 2010 [Refereed]
  • 東山,清水; 佐野,山田
    舗装 建設図書 45 (7) 5 - 10 0910-6219 2010 [Refereed]
  • HIGASHIYAMA Hiroshi; SHIMIZU Junichi; MIZUKOSHI Mutsumi
    Cement Science and Concrete Technology Japan Cement Association 63 (1) 500 - 506 0916-3182 2010 [Refereed]
     
    Ductile fiber reinforced cementitious composites（DFRCC）have been actively investigated. Although DFRCC shows a deflection hardening behavior with multiple cracking under the bending stress, the mechanical properties are influenced by the combination of composing materials such as fiber and matrix. The size of aggregate particles is expected to have a significant influence on the fracture properties of the matrix. The particle size of aggregate larger than the fiber spacing leads to balling and greater interaction of fibers in the paste. The increase in the particle size of aggregate makes it difficult to achieve a uniform dispersion of fibers.
    Therefore, the purpose of this study is to evaluate the influence of particle size and volume of fine aggregate on the mechanical properties of DFRCC under four points bending tests as per JCI standard（JCI-S-003-2007）. In this study, natural river sand and two types of silica sand were used as the fine aggregate. Test parameters herein were fine aggregate size, water-cement ratio and sand-cement ratio. From the results of bending tests, the larger ultimate tensile strain value was obtained from a combination of lower W/C and S/C, and smaller particle size of sand. Furthermore, a larger number of cracks were observed from a combination of lower S/C and smaller particle size of sand.
  • 高靭性ポリマーセメントモルタルを用いた下面増厚によるRCはりの曲げ補強効果
    水越,川上; 榊原,東山
    コンクリート工学年次論文集 32 (2) 1363 - 1368 2010 [Refereed]
  • 排水性舗装発生材から再生化した骨材のコンクリート舗装への適用性に関する研究
    清水,東山; 佐野,藤森
    建設用原材料 18 (1) 1 - 8 2010 [Refereed]
  • Punching Shear Strength of RC Slabs Using Lightweight Concrete
    東山 浩士; 香川工業高等専門学校
    Proc. of 5th International Structural Engineering and Construction Conference 111 - 117 2009/09
  • 半円シアコネクタの直接せん断実験
    上中; 東山,石川
    コンクリート工学年次論文集 31 (2) 1117 - 1122 2009 [Refereed]
  • HIGASHIYAMA Hiroshi; ISHIKAWA Toshiyuki; UENAKA Kojiro
    journal of the Japan Society for Testing Materials The Society of Materials Science, Japan 58 (11) 937 - 942 0514-5163 2009 [Refereed]
     
    Steel and concrete composite deck, which is arranged channel shape steel members in the transverse direction on the top surface of the bottom steel plate, has been investigated by the authors. By the arrangement of channel shape steel members welded to the bottom steel plate, the steel and concrete composite deck with cellars in the concrete becomes to be more lightweight than typical types of steel and concrete composite decks. For highway bridge decks, it is very important to verify the fatigue strength of the welded joint. In this paper, fatigue tests of the welded joint between the channel shape steel and the bottom steel plate were carried out under the tensile fatigue stress.
  • Hiroshi Higashiyama; Nemkumar Banthia
    ACI MATERIALS JOURNAL AMER CONCRETE INST 105 (3) 251 - 257 0889-325X 2008/05 [Refereed]
     
    The Purpose of this study was to assess the correlation between flexural toughness and shear toughness of normalweight and lightweight fiber-reinforced concretes (FRC). A crimped steel fiber with a crescent geometry was used throughout. For flexure, third-point loading tests were preformed as per ASTM C1609. For shear direct shear tests were performed using a modified version of the JSCE-G 553-1999 procedure. The flexural load-deflection curves were analyzed using the post-crack strengths (PCSm) method and the JSCE-G 552-1999 procedure. The shear load-deflection curves were analyzed using similar approaches. Results indicate that for a given fiber type and volume fraction, normalweight FRC depicts superior flexural and shear toughness characteristics than its lightweight counterpart. Also, for a given FRC, there appears to be a good correlation between its flexural toughness and shear toughness.
  • 軽量コンクリートを用いたRC床版の押抜きせん断耐荷力評価における低減係数の検討
    東山,山本
    第６回道路橋床版シンポジウム論文報告集 9 - 14 2008 [Refereed]
  • Hiroshi Higashiyama; Yasushi Kawashima; Masaki Aoki; Shigeyuki Matsui; Mutsumi Mizukoshi
    Zairyo/Journal of the Society of Materials Science, Japan Society of Materials Science Japan 57 (1) 90 - 96 0514-5163 2008 [Refereed]
     
    The purpose of this study is to determine the tension softening diagram and post-crack tensile strength of polypropylene fiber-reinforced lightweight concrete from bending tests and pull-out tests. Lightweight concrete has been actively applied in civil engineering applications, because the lightweight concrete is effective to reduce the dead load of structures and to improve the earthquake response of substructures. The addition of discontinuous fibers to cementitious materials drastically extends the toughness and strength of concrete. The tension softening diagram and fracture energy are important factors to analyze the mechanical behavior of concrete structures. And also, the post-crack tensile strength has been applied to predict the shear strength of fiber-reinforced concrete beams. In this study, the tension softening diagram and post-crack tensile strength of polypropylene fiber-reinforced lightweight concrete was determined by the bending test and the method based on the poly-linear approximation analysis. Furthermore, the post-crack tensile strength was clarified by the fiber-matrix interfacial bond strength obtained from the pull-out test. © 2008 The Society of Materials Science.
  • 東山,水越; 松井,青木
    構造工学論文集 54A 703-712  2008 [Refereed]
  • ポリプロピレン繊維補強軽量コンクリートの曲げタフネスとせん断タフネス
    東山,川島; 青木,松井
    セメント・コンクリート論文集 61 486 - 493 2008 [Refereed]
  • HIGASHIYAMA Hiroshi; UENAKA Kojiro; ISHIKAWA Toshiyuki; ARIMA Hiroto
    Proceedings of the Japan Concrete Institute 日本コンクリート工学協会 29 (3) 1333 - 1338 1347-7560 2007/07 [Refereed]
     
    鋼・コンクリート合成床版の軽量化を目的に,底鋼板に溶接された溝形鋼内を中空とした合成部材のせん断耐力について基礎的実験を行った。本構造では,従来型の鋼・コンクリート合成床版に比べて単位面積あたりの質量を10～15%程度軽減できる。本研究では,はり試験体を用いた橋軸方向および橋軸直角方向のせん断耐力について,せん断スパン比の影響を考慮して検討した結果,既往のせん断耐力算定式によって評価できることが分かった。
  • Study on Prediction of Fatigue Life of Deteriorated Reinforced Concrete Slabs under Chloride Attack
    東山 浩士; 石川 敏之; 上中宏二郎
    Proceedings of 5th Symposium on Decks of Highway Bridges 土木学会 125 - 130 2006/07 [Refereed]
     
    塩害と疲労劣化を受けるRC床版の疲労寿命を床版厚，かぶり厚などの違いから予測した．
  • Higashiyama Hiroshi; Mizukoshi Mutsumi; Aoki Masaki; Matsui Shigeyuki
    Concrete Research and Technology Japan Concrete Institute 17 (2) 23 - 31 1340-4733 2006 [Refereed]
     
    Load-carrying capacity of reinforced concrete (RC) members with lightweight concrete is lower in comparison with that of RC members with normal-weight concrete with the same compressive strength. This phenomenon depends on the fracture behavior of which the lightweight concrete is comparatively brittle to the normal-weight concrete. For the load-carrying capacity of RC members with the lightweight concrete, several reduction factors, which are applied to that of RC members with the normal-weight concrete, have been investigated by some researchers so far. The authors have been studied on the punching shear capacity of reinforced lightweight concrete slabs with the expansive shale aggregate. In the past studies conducted by the authors, the proposed reduction factors were constant values without a multiplicity of uses. In this paper, therefore, the applicable reduction factor to some kinds of lightweight concrete is derived in consideration with the fracture characteristics of the lightweight concrete. Consequently, the proposed method on punching shear capacity of the reinforced lightweight concrete slabs gives appropriate predicting values.
  • HIGASHIYAMA H.
    Third International Conference on Construction Matreials: Performance, Innovations and Structural Im Third International Conference on Construction Matreials 1 - 7 2005/08 
    軽量コンクリートを用いたRCはりのダウエル抵抗は普通コンクリートを用いた場合に比べて低下することが知られている．そこで，本研究では，その低下率をコンクリートの破壊エネルギーの違いに着目して評価を行った．
  • New Innovative PC Slabs, Composite Decks and FRP Decks in Japan
    松井 繁之; 東山 浩士; 大西 弘志
    Proceedings of the International Workshop on Innovative Bridge Deck Technologies ISIS Canada Research Network 3 - 29 2005/08 
    日本国内において研究開発された新形式PC床版，合成床版およびFRP合成床版に関する設計手法，疲労耐久性評価についてこれまで筆者らが行ってきた研究を紹介した．
  • 東山 浩士; 小田憲司; 松井繁之
    Proceedings of the 27th Annual Conference of the Japanese Concrete Institute 日本コンクリート工学協会 27 (2) 511 - 516 1347-7560 2005/06 [Refereed]
     
    劣化損傷したRC床版の押抜きせん断耐荷力を評価するために，予め格子状ひび割れを導入したRC床版試験体の押抜きせん断実験を実施し，その破壊性状から引張鉄筋位置の剥離破壊抵抗を低減することによって耐荷力を概ね推定することができた．
  • 東山,水越; 松井,小田
    コンクリート工学論文集 16 (1) 45 - 51 2005 [Refereed]
  • Punching Shear Capacity of RC Slabs with Lightweight Concrete
    東山 浩士; 松井繁之; 内田美生
    Proceeding of 2nd International Conference on Bridge Maintenance, Safety, Management and Cost IABMAS (S14) 07  2004/10 
    軽量コンクリートを用いたRC床版の押抜きせん断耐荷力算定方法を検討し，実験結果と比較を行った結果，精度よく推定することができた．
  • HIGASHIYAMA Hiroshi; HAYASHI Shuhei
    Journal of the School of Science and Engineering Kinki University 40 (40) 45 - 53 0386-4928 2004/09 
    Many studies have been carried out on concrete filled steel tubes in recent years. It is generally recognized that this structural system is enhanced ductility and stability. However, the use of steel tube in corrosive environment needs to prove. Using FRP tube, whose properties are lightweight, high strength and durability, may eliminate the problem of steel tube. In this study, axial compressive tests of concrete filled FRP tubes formed by the filament winding method were carried out to know the compressive behavior. And the stress-strain behavior was investigated by 2D nonlinear finite element analysis. From these results, axial compressive strength model was proposed and compared with various models proposed by some researchers.
  • Punching Shear Capacity of Reinforced Concrete Slabs Strengthened by Bottom Thickness Increasing Method
    東山 浩士; 松井繁之; 松本 弘
    Proceedings of 4th International Conference on Concrete under Sever Conditions ソウル国立大学 1745 - 1752 2004/06 
    ポリマーセメントモルタルにより下面増厚補強したRC床版の押抜きせん断耐荷力は，付着が良好であれば補強鉄筋量にほぼ比例して増加することを明らかにした．
  • 下面増厚補強したRC床版の押抜きせん断挙動に関する３次元非線形有限要素解析
    東山,小田
    第４回道路橋床版シンポジウム講演論文集 85 - 90 2004 [Refereed]
  • FUJIMORI Akinori; SANO Masanori; HIGASHIYAMA Hiroshi; YOSHIDA Nobuyuki; ARAI Takeshi
    Doboku Gakkai Ronbunshu Japan Society of Civil Engineers No.774 (V-65) 111 - 121 0289-7806 2004 [Refereed]
     
    Although drainage pavement is highly evaluated for high driving safety and low traffic noise, air voids in its porous structure are easily clogged with dust generated during normal service, preventing the pavement from functioning as expected. The authors have been studying drainage pavement of a dual structure consisting of a top layer of conventional porous asphalt concrete and a bottom bed equipped with rail-shaped bars, so that the performance is improved and maintained over time. The study results revealed that the dual drainage pavement is applicable to existing roads.
  • 東山,水越; 松井,小田
    コンクリート工学年次論文集 日本コンクリート工学協会 Vol.25, No.2, 649-654 (2) 649 - 654 1347-7560 2003 [Refereed]
     
    道路橋鉄筋コンクリート床版の軽量化を目的として,軽量コンクリートを採用することへの期待が高まっている。しかし,その床版の耐久性を評価するうえで基本となる押抜きせん断耐荷力に関して未だ充分に検討されていない。そこで,本研究では,軽量コンクリートの引張強度,せん断強度,弾性係数に関する材料試験を行い,既往のRC床版の押抜きせん断耐荷力算定式を基本とした軽量コンクリート床版の押抜きせん断耐荷力算定方法を検討した。
  • 負曲げモーメントに対する上面増厚床版の疲労耐久性照査
    コンクリート工学年次論文集 Vol.25, No.2, 1117-1122 2003 [Refereed]
  • ポリマーセメントモルタルにより下面増厚補強したRC床版の押抜きせん断耐荷力
    東山; 松井,伊藤
    第３回道路橋床版シンポジウム講演論文集 163 - 168 2003 [Refereed]
  • Estimation of Punching Shear Strenght of RC Slabs under Eccentric Load
    東山 浩士; 松井繁之
    Proceedings of the 1st fib Osaka Congress Fib 2002 Osaka Congress (11) 309 - 314 2002/10 
    偏心荷重を受けたRC床版の押抜きせん断実験を行い，偏心位置と耐荷力の関係が床版断面に作用するせん断力と相関していることを解析結果とともに明らかにした．
  • Flexural Fatigue Properties of Fiber Reinforced Concrete
    水越睦視; 東山 浩士; 松井繁之; 手塚光晴
    Proceedings of the 1st fib 2002 Osaka Congress Fib Osaka Congress (7) 29 - 34 2002/10 
    カーボン繊維，あるいは鋼繊維により補強したコンクリートの曲げ疲労実験を行い，繊維の種類，繊維混入量の違いから疲労寿命の評価を行った．
  • Higashiyama Hiroshi; Ito Sadayuki
    Journal of the School of Science and Engineering Kinki University 38 (38) 77 - 85 0386-4928 2002/09 
    鉄筋コンクリート部材の下面増厚補強に用いられるポリマーセメントモルタルの材料特性を評価し，疲労荷重下での鉄筋コンクリートはりの補強効果を確認した．
  • Strengthening Effect of RC Beams by Bottom Thickness Incresing Method with Polymer Cement Mortar
    東山 浩士; 松井繁之; 松本 弘
    Proceedings of 6th International Conference on Short & Medium Span Bridge カナダ土木学会 (2) 1401 - 1408 2002/07 
    ポリマーセメントモルタルを用いたRC部材の下面増厚補強を疲労荷重下において施したときの補強効果について実験的に検討を行った．
  • Higashiyama Hiroshi; Itoh Sadayuki
    Journal of the School of Science and Engineering Kinki University 37 (37) 49 - 55 0386-4928 2001/09 
    偏心荷重を載荷したときのRC床版の押抜きせん断耐荷力について実験を行い，荷重の位置によって耐荷力が変化することを示すとともに，各構造形式における耐荷力の低下率を推定した．
  • MIZUKOSHI Mutsumi; MATSUI Shigeyuki; HIGASHIYAMA Hiroshi; TEDUKA Mitsuharu
    Proceedings of Japan Concrete Institute 日本コンクリート工学協会 23 (3) 139 - 144 1340-4741 2001/07 [Refereed]
     
    CFRCの曲げ疲労寿命をプレーンコンクリートおよびSFRCと比較実験を行った結果，CFRCの疲労寿命は大きく，ひび割れ進展はある一定の深さまでは進展するが，その後は停留することが分かった．また，応力拡大係数とひび割れ進展速度に相関のあることを明らかにした．
  • PC床版の押抜きせん断耐荷力算定式に関する検討
    構造工学論文集 47A 1347 - 1354 2001 [Refereed]
  • HIGASHIYAMA Hiroshi; MATSUI Shigeyuki; ITOH Sadayuki
    コンクリート工学年次論文集 日本コンクリート工学協会 23 (3) 517 - 522 1340-4741 2001 [Refereed]
     
    道路橋床版上を走行する車両の位置は完全にランダムなものではなく,車種にかかわらずある確率分布特性を有していることが分かっている。このことから最頻載荷位置は床版中央に限らず,このような位置での疲労耐久性の評価を行うには同位置での押抜きせん断耐荷力の評価が必要である。しかし,RC床版の押抜きせん断耐荷力に関する既往の研究では床版中央での載荷実験にもとついた耐荷力算定式が提案されており,載荷位置を変えた実験は非常に少ない。本研究では載荷位置を変えたRC床版の押抜きせん断耐荷力実験を行い,耐荷力に与える偏心荷重の影響を調べた。
  • 外ケーブルを併用した既設合成桁橋の連続化
    鋼構造年次論文報告集 7 549 - 556 1999
  • 弾性支承使用による合成桁床版の耐久性への影響に関する研究
    鋼構造論文集 5 (18) 71 - 80 1998 [Refereed]
  • プレストレスしたコンクリート床版の押抜きせん断耐荷力
    構造工学論文集 (44A) 1357 - 1364 1998 [Refereed]
  • HIGASHIYAMA Hiroshi; MATSUI Shigeyuki
    土木学会論文集 土木学会 605 (I-45) 79 - 90 0289-7806 1998
  • 橋軸方向にプレストレスしたコンクリート床版の走行輪荷重下での疲労強度
    中小スパン橋梁の発展に関する国際会議 1779 - 1787 1998
  • 松井繁之
    鋼構造論文集 4 (13) 9 - 18 1997 [Refereed]
  • 剛支承から弾性支承へ取替えたときの床版挙動に与える影響
    コンクリート工学年次論文報告集 19 (2) 1479 - 1484 1997 [Refereed]

Books etc

  • 構造力学問題集－基本問題からチャレンジ問題まで－
    東山浩士; 石川敏之; 上中宏二郎; 大山理 (Contributor)コロナ社 2021/02
  • 道路管理者のための中小規模橋梁の維持管理ハンドブック
    東山 浩士 (Contributor第１章)近畿建設協会 2017/08
  • 道路橋床版の長寿命化技術
    (Contributor第2章)森北出版 2016/09
  • 図説 わかるメンテナンス 土木・環境・社会基盤施設の維持管理
    (Contributor第６章 補修・補強の方法)学芸出版 2010
  • コンクリート構造の設計・施工・維持管理の基本
    (Contributor設計編，10章 コンクリート板構造の設計)土木学会関西支部 2009
  • 道路橋床版
    (Contributor)森北出版 2008
  • 外ケーブルによる鋼橋の補強 －設計と施工の手引き－
    (Contributor)森北出版 2005
  • Fundamentals of Design, Construction and Maintenance of Concrete Structures, Chap. 10 Design of Reinforced Concrete Slab Structures
    松井繁之; 東山 浩士; 大西弘志; 島田 功 (Joint work)土木学会関西支部 2003/12 
    鉄筋コンクリート板構造の設計に必要な基本的な事項をまとめた．
  • コンクリート構造の設計・施工の基本
    (Contributor設計編，10章 鉄筋コンクリート板構造の設計)土木学会関西支部 2003

Conference Activities & Talks

  • Size Effect of Coarse Aggregate on Shear strength of Concrete  [Not invited]
    東山 浩士; 上中宏二郎; 杉本義博; 香山慶大; 石川敏之
    土木学会関西支部年次講演会  2006/06  神戸  土木学会関西支部年次講演会
     
    コンクリートの直接せん断強度に及ぼす粗骨材寸法の影響について実験的に調査を行った．
  • Development and Fundamental Experiment on Lightweight Steel and Concrete Composite Slab  [Not invited]
    東山 浩士; 上中宏二郎; 石川敏之
    土木学会関西支部年次講演会  2006/06  神戸  土木学会関西支部年次講演会
     
    軽量化した鋼・コンクリート合成床版の開発に向けた提案とはりモデルでによる静的および疲労実験による構造性能の評価を行った．
  • Direct Shear Strength of Concrete with Difference Size of Coarse Aggregate  [Not invited]
    有馬 博人; 東山 浩士; 上中 宏二郎; 石川 敏之; 田原 潤
    土木学会関西支部  2005/05  大阪  土木学会関西支部
     
    コンクリートのせん断強度について粗骨材径が及ぼす影響について実験的に検討した．その結果，骨材径に伴ってせん断強度が線形的に低下することが分かった．
  • Parametric Analysis on Punching Shear Capacity of Lightweight Concrete Slabs  [Not invited]
    東山 浩士; 松井繁之; 内田美生
    平成１６年度土木学会関西支部年次学術講演会  2004/05  草津  平成１６年度土木学会関西支部年次学術講演会
     
    軽量RC床版の押抜きせん断耐荷力について材料特性をパラメータにして，実橋への適用性について検討した．
  • Analysis on Punching Shear Behavior of RC Slabs Strengthened by Bottom Thickness Increasing  [Not invited]
    東山 浩士; 松井繁之
    平成１６年度土木学会関西支部年次学術講演会  2004/05  草津  平成１６年度土木学会関西支部年次学術講演会
     
    下面増厚補強したRC床版の押抜きせん断挙動を３次元非線形有限要素法により解析を行い，実験結果との比較を行った．
  • Slab Thickness of Lightweight Concrete Slabs  [Not invited]
    東山 浩士; 水越睦視
    第２５回日本道路会議  2003/11  東京  第２５回日本道路会議
     
    軽量コンクリート床版の床版厚，重量低減について材料特性を考慮したパラメータ計算により検討した．
  • Experimental Study on Axial Compressive Behavior of Concrete Filled FRP Tubes  [Not invited]
    東山 浩士; 津田久嗣; 宮崎; 徹; 野久保裕行
    土木学会第５８回学術講演会概要集  2003/09  徳島  土木学会第５８回学術講演会概要集
     
    カーボンファイバー，グラスファイバーを用いたコンクリート充填FRP管の軸圧縮実験を行い，軸圧縮挙動の比較，拘束効果の比較を行った．
  • Dowel Resistance of RC Beams used Lightweight Concrete  [Not invited]
    東山 浩士; 水越睦視; 松井繁之
    平成１５年度土木学会関西支部年次学術講演会  2003/05  大阪  平成１５年度土木学会関西支部年次学術講演会
     
    軽量骨材コンクリートと普通骨材コンクリートを用いたRCはりの引張鉄筋位置におけるダウエル抵抗を実験的に調べた．その結果，軽量骨材コンクリートを用いたはりのダウエル抵抗は大きく低下した．
  • Strengthening Design Method of External Tendons Considering Composite Level between Steel Girder and Concrete Slab  [Not invited]
    武藤和好; 東山 浩士; 鈴木 真
    土木学会第５６回年次学術講演会  2001/10  熊本  土木学会第５６回年次学術講演会
     
    鋼・コンクリート合成桁の外ケーブル補強においてずれ止めの合成度を考慮した設計法を提案した．
  • Influence of Eccentric Load on Punching Shear Capacity of RC Slabs  [Not invited]
    東山 浩士; 松井繁之
    土木学会関西支部年次学術講演会  2001/06  大阪  土木学会関西支部年次学術講演会
     
    偏心荷重を載荷したときのRC床版の押抜きせん断耐荷力について実験を行い，変形およびひずみ分布から力学的性状を比較検討した．荷重の位置によって耐荷力が変化することを示した．

MISC

  • 増戸洋幸; 榎本勇太; 塚本真也; 東山浩士  土木学会年次学術講演会講演概要集(CD-ROM)  74th-  2019
  • 東山浩士; 増戸洋幸; 塚本真也; 阿部長門; 関口幹夫  土木学会年次学術講演会講演概要集(CD-ROM)  73rd-  2018
  • 増戸洋幸; 永見晃之; 塚本真也; 東山浩士  日本道路会議論文集(CD-ROM)  32nd-  2017
  • Research on Reinforced Concrete Structures Damaged by Salt Attack
    梶川裕子; 東山 浩士; 鬼頭宏明  Proceeding of 5th Japan-Korea Joint Seminar on Bridge Maintenace  7  -12  2004/11
  • Punching Shear Failure Model of Prestressed Concrete Slabs, Lightweight Aggregate Concrete Slabs, and Strengthened Slabs by Bottom Thickness Increasing Method
    東山 浩士; 松井繁之  Proceeding of 5th Japanese-German Joint Symposium on Steel and Composite Bridges  285  -294  2003/09
  • Punching Shear Capacity of RC Slabs under Eccentric Loading
    Proceedings of Annual Conference of JCI  23-  (3)  517  -522  2001
  • Fatigue Durability of Fiber Reinforced Concrete Decks Under Running Wheel Load
    Proceedings of the 3rd International Conference on Concrete under Severe Conditions  (1)  982  -991  2001
  • Modification of Predicting Formula of Punching Shear Capacity for Prestressed Concrete Slabs
    Proceedings of Structural Engineering  47A-  1347  -1354  2001
  • Retrofitting by External Tendons to Convert Simple Span Composite Girder Bridges to Continuous Girder Bridge
    Journal of Constructional Steel  7-  549  -556  1999
  • FATIGUE STRENGTH OF LONGTUDINALLY PRESTRESSED CONCRETE SLABS UNDER RUNNING WHEEL
    Developments in Short and Medium Span Bridge Engineering '98  1779  -1787  1998
  • Prediction on Punching Shear Capacity of Prestressed Concrete Slabs
    Proceedings of Stractural Engineering  (44A)  1357  -1364  1998
  • Influence on Durability of Concrete Slab in Composite Bridge due to Use of Elastic Supports
    Steel Construction Engineering  5-  (18)  71  -80  1998
  • JSCE Journal  605-  (I-45)  79  -90  1998
  • Study on Improvement of Structural Behaviors of Precast RC Slabs on Composite Girder Bridge Prestressed by External Cables
    Steel Construction Engineering  4-  (13)  9  -18  1997
  • PARK Jong-Jin; MATSUI Shigeyuki; HIGASHIYAMA Hiroshi; EGASHIRA Keizo  Proceedings of Annual Conference of JCI  19-  (2)  1479  -1484  1997

Awards & Honors

  • 2021/08 関西道路研究会 優秀研究者賞
     FWD試験による道路橋RC床版の健全度評価方法の構築 
    受賞者: 東亜道路工業株式会社 技術部 塚本真也;近畿大学理工学部社会環境工学科 東山浩士
  • 2020/10 （一財）災害科学研究所 2020年度優秀研究賞
     
    受賞者: 社会基盤維持管理研究会;東山
  • 2017/10 （一財）災害科学研究所 平成29年度 優秀研究賞
     
    受賞者: 道路橋イノベーション研究会
  • 2017/08 19th International Conference on Civil Engineering and Materials Best Paper Award
     Surface temperature of asphalt pavements with colored cement-based grouting materials containing ceramic waste pwoder and zeolite 
    受賞者: H. Higashiyama;M. Sano;F. Nakanishi;M. Sugiyama;M. Kawanishi;S. Tsukuma
  • 2015/10 一般社団法人産業環境管理協会 「平成27年度資源循環技術・システム表彰」 経済産業省産業技術環境局長賞
  • 2014/10 （一財）災害科学研究所 平成26年度 優秀研究賞
     
    受賞者: 東山 浩士
  • 2007/11 第２７回日本道路会議 論文奨励賞
     
    受賞者: 東山浩士;清水準一;佐野正典

Research Grants & Projects

  • Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research
    Date (from‐to) : 2022/04 -2025/03 
    Author : 東山 浩士
  • Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)
    Date (from‐to) : 2019/04 -2022/03 
    Author : Higashiyama Hiroshi
     
    In the proper soundness evaluation of road bridge slabs using FWD, it is important to correct the deflection of slabs to account for the influence of stiffness of the asphalt pavement, which depends on its temperature. In this study, the temperature measurement inside asphalt pavements on concrete slabs was conducted over a period of one year using specimens that simulated actual bridge slabs. From the measurement results, using some models that can estimate the average temperature of the asphalt pavements on the slabs, the predicting accuracy was compared among them. Consequently, it was confirmed that the predicting model can be used in the practical measurement using FWD. Next, FWD tests were conducted on specimens simulating real bridge slabs. The correction method proposed was verified using the measured deflection. The results revealed that the deflection after correcting was estimated with an error of approximately 10% against the measured deflection.
  • 碍子粉を活用した路面温度低減型舗装の疲労耐久性の研究
    日本学術振興会：学術研究助成基金基盤研究(C)
    Date (from‐to) : 2016/04 -2018/03 
    Author : 東山 浩士
  • 橋梁の維持管理における市町村の問題点抽出とその対応方針
    近畿建設協会：研究助成
    Date (from‐to) : 2016/04 -2017/03 
    Author : 東山 浩士
  • 廃棄碍子モルタルの塩分浸透抑制メカニズムの解明と強度特性の把握
    日本学術振興会：学術研究助成基金基盤研究(C)
    Date (from‐to) : 2013/04 -2016/03 
    Author : 東山 浩士
  • 溶接形状を改良した頭付きスタッドの回転せん断疲労強度に及ぼすコンクリート強度の影響
    近畿建設協会：研究助成
    Date (from‐to) : 2012/04 -2013/03 
    Author : 東山 浩士
  • 廃棄碍子を骨材とした塩分浸透抑制モルタルの材料開発と評価
    関西エネルギー・リサイクル科学研究振興財団：
    Date (from‐to) : 2011/04 -2012/03 
    Author : 東山 浩士

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