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RESEARCH ON CONSRETE STRUCTURES WITH HIGH DUCTILITY

Research Project

Project/Area Number 08044153
Research Category

Grant-in-Aid for international Scientific Research

Allocation TypeSingle-year Grants
SectionJoint Research
Research Field 土木材料・力学一般
Research InstitutionHIROSHIMA UNIVERSITY

Principal Investigator

YONEKURA Asuo  HIROSHIMA UNIVERSITY,FACULTY OF ENGINEERING,PROFESSOR, 工学部, 教授 (00034372)

Co-Investigator(Kenkyū-buntansha) TADROS Maher K.  UNIVERSITY OF NEBRASUKA,COLLEGE OF ENGINEERING AND TECHNOLOGY,PROFESSOR, 工学部, 教授
TAZAWA Ei-ichi  HIROSHIMA UNIVERSITY, FACULTY OF ENGINEERING,PROPESSOR, 工学部, 教授 (60155067)
周 平  広島大学, 大学院・工学研究科, 日本学術振興会特別研
河合 研至  広島大学, 工学部, 助教授 (90224716)
Project Period (FY) 1996 – 1997
Project Status Completed (Fiscal Year 1997)
Budget Amount *help
¥9,500,000 (Direct Cost: ¥9,500,000)
Fiscal Year 1997: ¥4,600,000 (Direct Cost: ¥4,600,000)
Fiscal Year 1996: ¥4,900,000 (Direct Cost: ¥4,900,000)
Keywordsductility / three dimensional confinement / fIexural rigidity / ultimate shear strength / reinforced concrete column / prestressed concrete composite girder / high ductile concrete member / seismic resistant structure / 靱性 / 高靱性コンクリート部材 / 広島大学 / ネブラスカ大学 / ノースリッジ地震 / 阪神・淡路大震災 / 鉄筋コンクリート橋脚 / 炭素繊維
Research Abstract

Generally, ductility of reinforced concrete members is lower steel members because of the brittle characteristics of concrete. Hanshin-Awaji Earthquake and Northridge Earthquake destroyed many infrastructures in an instant. To avoid critical damages of concrete structures, the concrete members with high ductility must be developed.
Nominal tensile strength can be dramatically improve when concrete is triaxially precompressed. To apply triaxial precompression, concrete members must be tie with steel or FRP.Another way is to cast concrete in a steel or FRP pipe, and apply prestress with conventional method. This method create triaxial precompression by which a steel or FRP pipe confines poisson's strain nominal to the prestress.Another method to create triaxially precompressed concrete member is chemical prestressing using expansive concrete in steel or FRP pipes.
The objective of this research is to study mechanical characteristics of the triaxially precompressed members and the applicati … More ons, and to develop new type of concrete structures with this concept. The following results were obtained from the research at Hiroshima University in Japan and the University of Nebraska in the US.
1.The ductility of the triaxially precompressed concrete beams subjected to bending moment can reach ten times more than conventionally reinforced or prestressed concrete members.
2.In the study on the mechanical characteristics of triaxially confined concrete, the ultimate load and ductility are improved for the specimens with regular concrete in steel and FRP pipes subjected to axial load, comparing with the conventional reinforced concrete column. And at the same condition, the ultimate load and ductility for an unbond confined concrete column are larger than those for a bond one.
3.The ultimate load and stiffness of confined concrete columns with expansive concrete in steel or FRP pipes subjpcted to axial load are larger than those with regular concrete.
4.The ultimate strength and compressive stiffness of reinforced concrete columns with steel straps are higher than those with deformed round bars in case of the same nominal confining effect. The shear strength of the columns with steel straps subjected to vertical load and cyclic horizontal load is higher than that with deformed round bars.
5.Studies on the applications and feasibility of the new type of structures with triaxially precompressed members to arch structures or composite girders were carried out.
6.Field trip to see Repaired and Retrofitted structures damaged by Hanshin-Awaji Earthquake in Japan and Northridge Earthquake in the US were conducted. Less

Report

(3 results)
  • 1997 Annual Research Report   Final Research Report Summary
  • 1996 Annual Research Report
  • Research Products

    (27 results)

All Other

All Publications (27 results)

  • [Publications] 角 広幸: "三次元拘束によるコンクリートの力学的特性の改善に関する研究" コンクリート工学年次論文報告集. 18巻. 555-560 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 周 平: "三次元拘束によるPC部材の曲げ特性" コンクリート工学年次論文報告集. 18巻. 731-736 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 天野 玲子: "既設RC橋脚の基部リング拘束耐震補強工法" 土木学会 第2回 阪神・淡路大震災に関する学術講演会論文集. 317-322 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 米倉 亜州夫: "多軸拘束によるPC部材の高耐震化に関する研究" 日本コンクリート工学協会 コンクリート系構造物の耐震技術に関するシンポジウム. 129-138 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Asuo YONEKURA: "The Effect of Three Dimensional Constraint on Compressive Characteristics of Concrete" International Conference on Engineering Materials CSCE & JSCE. 633-648 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Asuo YONEKURA: "Flexural Characteristics of Prestressed Concrete Beams Using FRP Pipes or FRP Rods" FRPRCS-3,Third International Symposium on Non-Metallic(FRP)Reinforcement for Concrete Structures. 751-758 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Hiroshi SHlNBO: "A Seismatic Retrofit of Concrete Piers with CFRP Ring and Expansive Concrete" FRPRCS-3,Third International Symposium on Non-Metallic(FRP)Reinforcement for Concrete Structures. 363-370 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Hiroyuki Sumi, Asuo Yonekura, Ei-ichi Tazawa and Hideki Morimoto: "Mechanical Properties of Concrete Improved by Three Dimensional Confinement ( in Japanese )" Proceedings of the Japan Concrete Institute. Vol.18, No.1. 555-560 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Ping Zhou, Asuo Yonekura, Ei-ichi Tazawa and Hideki Morimoto: ""Flexural Properties of Prestressed concrete Beams Subjected to Three Dimensional Confinement" ( in Japanese )" Proceedings of the Japan Concrete Institute. Vol.18, No2. 731-736 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Reiko Amano, Kazuo Yamada, Hiroshi Shinbo and Asuo Yonekura: ""A Seismatic Retrofit Method for Existing Concrete Piers with Ring Confinement"( in Japanese )" JSCE, Second Proceedings of JSCE Symposium on Hanshin-Awaji Great Earthquake. 317-322 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Asuo Yonekura, Ei-ichi Tazawa, Ping Zhou: ""Improvement of Seismic Resistance for Prestressed Concrete Confined by Muitiaxial Prestress"( in Japanese )" PRoceeding of JCI Symposium on Seismic Retrofitting Technics for Concrete Strustures. 129-138 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Asuo Yonekura, Ei-ichi Tazawa, Ping Zhou: ""The Effect of Three Dimensional Constraint on Compressive Characteristics of Concrete"" International Conference on Enginering Materials CSCE & JSCE. 663-648 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Asuo Yonekura, Ei-ichi Tazawa and Ping Zhou: ""Flexural Characteristics of Prestressed Concrete Beams Using FRP Pipes or FRP Rods"" FRPRCS-3, Third International Symposium on Non-Metallic (FRP) Reinforcement for Concrete Sructures. 751-758 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Hiroshi Shinbo, Kazuo Yamada, Hajime Asai, Masayasu Iwata and Asuo Yonekura: ""A Seismatic Retrofit of Concrete Piers with CFRP Ring and Expansive Concrete"" FRPRCS-3, Third International Symposium on Non-Metallic (FRP) Reinforcement for Concrete Structures. 363-370 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 天野 玲子: "既設RC橋脚の基部リング拘束耐震補強工法" 土木学会第2回 阪神・淡路大震災に関する学術講演会論文集. 317-322 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 米倉 亜州夫: "多軸拘束によるPC部材の高耐震化に関する研究" 日本コンクリート工学協会「コンクリート系構造物の耐震技術に関するシンポジウム」. 129-138 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Asuo YONEKURA: "The Effect of Three Dimensional Constraint on Compressive Characteristics of Concrete" International Conference on Enginering Materials CSCE&JSCE. 633-648 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Asuo YONEKURA: "Flexural Characteristics of Prestressed Concrete Beams Using FRP Pipes or FRP Rods" FRPRCS-3,Third Internatioal Symposium on Non-Metallic (FRP) Reinforcement for Concrete Sructures. 751-758 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Hiroshi SHINBO: "Aseismatic Retrofit of Concrete Piers with CFRP Ring and Expansive Concrete" FRPRCS-3,Third Internatioal Symposium on Non-Metallic (FRP) Reinforcement for Concrete Sructures. 363-370 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 角 広幸: "三軸拘束を受けるコンクリートの力学的特性" コンクリート工学年次論文報告集. 17巻. 53-58 (1995)

    • Related Report
      1996 Annual Research Report
  • [Publications] 米倉 亜州夫: "三次元的拘束を受けたコンクリートの圧縮及びクリープ特性" セメント・コンクリート研究討論会論文報告集. 29-34 (1995)

    • Related Report
      1996 Annual Research Report
  • [Publications] 米倉 亜州夫: "三次元拘束を受けるモルタルのクリープ" セメント・コンクリート論文集. No.49. 576-581 (1995)

    • Related Report
      1996 Annual Research Report
  • [Publications] Asuo YONEKURA: "Influence of Torsion on Mechanical Characteristics of PC Beams Using FRP Rods" Proceedings of the Second International RILEM Symposium (FRPRCS-2) “Non-Metalic (FRP) Reinforcement for Concrete Structures". Proc.29. 448-455 (1995)

    • Related Report
      1996 Annual Research Report
  • [Publications] 角 広幸: "三次元拘束によるコンクリートの力学的特性の改善に関する研究" コンクリート工学年次論文報告集. 18巻. 555-560 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 周 平: "三次元拘束によるPC部材の曲げ特性" コンクリート工学年次論文報告集. 18巻. 731-736 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 天野 玲子: "既設RC橋脚の基部リング拘束耐震補強工法" 土木学会 第2回 阪神・淡路大震災に関する学術講演会論文集. 317-322 (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] 米倉 亜州夫: "多軸拘束によるPC部材の高耐震化に関する研究" 日本コンクリート工学協会 「コンクリート系構造物の耐震技術に関するシンポジウム」. (発表予定). 4月22日 (1997)

    • Related Report
      1996 Annual Research Report

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Published: 1996-04-01   Modified: 2016-04-21  

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