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1990 Fiscal Year Final Research Report Summary

Application of Limit State Design on Prestressed Concrete Cable Stayed Bridge

Research Project

Project/Area Number 01302042
Research Category

Grant-in-Aid for Co-operative Research (A)

Allocation TypeSingle-year Grants
Research Field コンクリート工学・土木材料・施工
Research InstitutionKyoto University

Principal Investigator

FUJII Manbu  Kyoto University, Faculty of Eng., Professor, 工学部, 教授 (30031074)

Co-Investigator(Kenkyū-buntansha) INOUE Susumu  Kyoto University, Faculty of Eng., Instructor, 工学部, 助手 (30168447)
MIYAMOTO Ayaho  Kobe University, Faculty o Eng., Associate Professor, 工学部, 助教授 (10093535)
INOUE Syoichi  Tottori University, Faculty of Eng., Associate Professor, 工学部, 助教授 (10032286)
MIYAGAWA Toyoaki  Kyoto University, Faculty of Eng., Lecturer, 工学部, 講師 (80093318)
KOBAYASHI Kazuo  Osaka Institute of Technology, Faculty of Eng., Professor, 工学部, 教授 (10021586)
Project Period (FY) 1989 – 1990
KeywordsPrestressed Concrete Cable Stayed Bridge / Limit State Design / Strength Design / Durability Design / Optimization / Confining Reinforcement / Alkali-Silica Reaction
Research Abstract

In this study, the application of limit state design on cable stayed bridges is considered. The main results are summarized as follows ;
In designing a prestressed concrete cable stayed bridge, such important problems like finding the optimal Value of cable stay forces and girder prestress as well as the selecting arrangement of stay cable, shape of main girder, etc. has to be overcome. In this study, a method of optimization considering a combination of the stay cable forces, the girder prestressing, creep and shrinkage of concrete and construction process is developed based on the strain energy criterion. And also an optimization system to determine automatically both cable stay forces and girder prestress is developed using a personal computer.
An experimental study on the ultimate strength and ductility of reinforced square columns with confining reinforcement is conducted. Sixty specimens, each 200 mm square by 800 mm high, containing either 8 or 12 longitudinal steel bars and different arrangement of square or octagonal steel hoops, were subjected to eccentric loads to failure under uniaxial or biaxial bending. Other variables were the spacing of hoops and the eccentricities of loads. Based on the test results and analyses, new formulas are proposed for the ultimate strength and ductility of the columns with confinement subjected uniaxial or biaxial bending.
Recently a number of examples of premature deterioration caused by alkali-silica reaction have been reported. In this study, the concrete surface treatment is discussed related to the maintenance work. The long term performance of typical surface treatment is examined and the effect of surface treatment on expansion of concrete due to alkali-silica reaction is investigated experimentally. The fundamental concept to determine the effect of surface treatment for alkali-silica reaction is discussed.

  • Research Products

    (8 results)

All Other

All Publications (8 results)

  • [Publications] 藤井 学: "PC斜張橋の斜材張力および主桁プレスレスの最適化に関する研究" 土木学会論文集. 408/Vー11. 31-40 (1989)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 平澤 征夫: "横拘束鉄筋を有する鉄筋コンクリ-ト正方形断面柱の終局耐力と靭性に関する実験的研究" 土木学会論文集. 408/Vー11. 21-30 (1989)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 宮川 貴章: "コンクリ-トの表面処理によるASR膨張の抑制効果について" コンクリ-ト工学論文集. 2ー1. 135-148 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 井上 晋: "RC角柱供試体の主筋座屈に関する実験的検討" コンクリ-ト工学年次論文報告集. 13. (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] HIRASAWA, Ikuo: "Experimental studies on ultimate strength and ductility of reinforced square columns with confining reinforcement" Proc. of JSCE. No. 408/V-11. 21-30 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] FUJII, Manabu: "Optimization of cable stay forces and girder prestress of prestressed concrete cable stayed bridges" JSCE Concrete Library International. No. 15. 39-58 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] MIYGAWA, Toyoaki: "Effect of concrete surface treatment on expansion due to alkali-silica reaction" Concrete Research and Technology. Vol. 2, No. 1. 135-148 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] INOUE, Susumu: "Experimental studies on buckling of longitudinal reinforcement in RC column specimens" Proc. of JCI. Vol. 13.

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1993-08-12  

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