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Control of Dynamic Collapse Mechanism for Reinforced Concrete Frames

Research Project

Project/Area Number 05452257
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field Building structures/materials
Research InstitutionTokyo Metropolitan University

Principal Investigator

NISHIKAWA Takao  Tokyo Metropolitan Univ., Dept. of Archiecture, Professor, 工学部, 教授 (30087275)

Co-Investigator(Kenkyū-buntansha) YAMAMURA Kazushige  Tokyo Metropolitan Univ., Dept. of Architecture, Research Associate, 工学部, 助手 (30220437)
MINAMI Susumu  Tokyo Metropolitan Univ., Dept. of Architecture, Research Associate, 工学部, 助手 (00219693)
KITAYAMA Kazuhiro  Tokyo Metropolitan Univ., Dept. of Architecture, Associate Professor, 工学部, 助教授 (70204922)
Project Period (FY) 1993 – 1994
Project Status Completed (Fiscal Year 1994)
Budget Amount *help
¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 1994: ¥2,600,000 (Direct Cost: ¥2,600,000)
Fiscal Year 1993: ¥1,000,000 (Direct Cost: ¥1,000,000)
KeywordsReinforced concrete / Frames / Collapse mechanism / Tensile axial load / Shear / Column / Ductility / Seismic resistance / 付着 / 地震応答解析 / 塑性ヒンジ / 静的実験 / 柱・梁接合部
Research Abstract

It is desirable to form plastic hinges at all beam ends and bottom of columns in first story for reinforced concrete (R/C) frames to dissipate hysteretic energy due to strong ground motions. The axial load developed in exterior columns in these frames is varied from compression to tension because of the change of the direction of earthquake attacks. However shear behavior and interaction between shear and flexure have been not studied for R/C columns subjected to varying column axial load. It is very important to prevent shear failure of columns at first story. This makes possible to control the collapse mechanism of R/C frames under earthquakes. Then four columns with half-scale were tested to investigate shear strength under tensile axial load. Column section was 300mm x 300 mm. The shear span to column depth ratio was 1.0. Concrete compressive strength was 222 to 247 kgf/cm^2. Yield strength of hoops was 4030 kgf/cm^2.
With the increase in tensile axial load of specimens diagonal cracks developed drastically and shear strength decreased moderately ; i.e. that of the column with axial stress of 0.2 times the concrete compressive strength decayd to 93 % of that without column axial load. On the contrary, ductility of specimens was improved by the increase in tensile axial force of a column. Shear strength of the column with shear reinforcement of 0.43 % was 1.3 times larger than that with shear reinforcement of 0.21 %. Shear resistant mechanism of columns under tensile axial load, moreover, will be studied using the strain and bond stress distributions along longitudinal reinforcement, the strain in shear reinforcing bars and local deformation due to shear and flexure.

Report

(3 results)
  • 1994 Annual Research Report   Final Research Report Summary
  • 1993 Annual Research Report
  • Research Products

    (13 results)

All Other

All Publications (13 results)

  • [Publications] 呉的、西川孝夫: "柱の変動軸力を考慮した高層骨組の弾塑性地震応答解析" 日本建築学会大会学術講演梗概集. B構造I. 681-682 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 北山和宏、西川孝夫ほか: "鉄筋コンクリート梁部材のせん断補強法に関する研究" コンクリート工学年次論文報告集. Vol.16. 503-508 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 北山和宏: "鉄筋コンクリート柱・梁接合部の耐震設計に関する研究" 第9回日本地震工学シンポジウム. Vol.2. 2047-2052 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] WU Cheng and T.Nishkawa: "Elastic-Plastic Earthquake Response Analysis of a High-rise Frame in Consideration of Varying Axial Force on Columns" Summaries of Technical Papers of Annual Meeting, Architectural Institute of Japan. Structures I. 681-682 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] KITAYAMA Kazuhiro, T.Nishikawa, et.al: "Shear Reinforcement Method of R/C Beams" Proceedings of the Japan Concrete Institute. Vol.16, No.2. 503-508 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] KITAYAMA Kazuhiro: "Seismic Resistant Design of Reinforced Concrete Beam-Column Joints" Proceedings of the Ninth Japan Earthquake Engineering Symposium. Vol.2. 2047-2052 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 呉 誠,西川 孝夫: "柱の変動軸力を考慮した高層骨組の弾塑性地震応答解析" 日本建築学会大会学術講演梗概集. B構造I. 681-682 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] 北山 和宏、西川孝夫ほか: "鉄筋コンクリート梁部材のせん断補強法に関する研究" コンクリート工学年次論文報告集. Vol.16. 503-508 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] 北山 和宏: "鉄筋コンクリート柱・梁接合部の耐震設計に関する研究" 第9回日本地震工学シンポジウム. Vol.2. 2047-2052 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] 関崇夫・西川孝夫: "回折波を考慮した波線理論による傾斜層の地表面応答性状に関する研究" 日本建築学会構造系論文報告集. No452. 21-30 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 呉誠・西川孝夫: "簡略モデルを用いた骨組の地震時の崩壊形式の推定法に関する研究" 日本建築学会大会学術講演梗概集 B 構造I. 435-436 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 野口博・北山和宏ほか: "高強度材料を用いたRC短柱のせん断挙動のFEM解析" コンクリート工学年次論文報告集. Vol.15-2. 11-16 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 北山和宏: "非線形地震応答に基づくRC柱・梁接合部内の梁主筋付着劣化の制限" 日本建築学会学術講演梗概集 C 構造II. 833-834 (1993)

    • Related Report
      1993 Annual Research Report

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Published: 1993-04-01   Modified: 2016-04-21  

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