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1998 Fiscal Year Final Research Report Summary

Study on the cumulative out-of-plane deformation of steel beam-culumn subjected to cyclic horizontal and torsional loads

Research Project

Project/Area Number 09650632
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Building structures/materials
Research InstitutionNagasaki University

Principal Investigator

SHUGYO Minoru  Nagasaki Univ., Faculty of Eng., Prof., 工学部, 教授 (70039668)

Co-Investigator(Kenkyū-buntansha) LI Jian Ping  Nagasaki Univ., Faculty of Eng., Research Assistant, 工学部, 助手 (50274626)
Project Period (FY) 1997 – 1998
Keywordssteel beam-column / steel pipe / cyclic behavior / lateral load / out-of-plane deformation / elastoplastic instability / torsion
Research Abstract

Elastoplastic unstable behavior divergence of cumulative out-of-plane deformation, of a beam-column with hollow circular section subjected to proportional cyclic loading of horizontal and torsional loads under constant. axial force was investigated. Since it. had been clarified by the authors that the lateral force caused by the horizontal displacement of the column top and torsional load is the cause of the unstable behavior the experiments were done by replacing the torsional load with a small constant lateral load.
The experiments were performed using 6 test specimens under the condition tha.t constant lateral force H_2 is 0.1H_y_2 and constant axial force is 0 or 0.3F_y_x or 0.4F_y_x or O.5F_y_x, where H_y_x is the initial yield lateral force and F_y_x is the initial yield axial force of the beam-column.
The results showed that. a remarkable cumulative out-of-plane deformation occures in the beam-column subjected to cyclic horizontal load under a constant lateral load and a constant axial force and it has a tendency to diverge. The numerical method proposed by the authors can predict. the unstable behavior with good accuracy.

  • Research Products

    (4 results)

All Other

All Publications (4 results)

  • [Publications] Shugyo,Minoru: "Inelastic Instability of Steel Pipe Beam-Column subjected to Cyclic Horizontal and Torsional Loads" Proceedings of the 5-th international colloquium on stability and ductility of steel structures. 553-560 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 修行稔: "小さな横荷重の下で繰返し水平力を受ける円形鋼管柱の構面外変形" 日本建築学会九州支部研究報告. 第38号. 521-524 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Shugyo, M and Li, Jian Ping: ""Inelastic Instability of Steel Pipe Beam-Column subjected to Cyclic Horizontal and Torsional Loads"" Proc.of the 5th International Colloquium on Stability and Ductility of Steel Structures. 553-560 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Shugyo, M and Li, Jian Ping: ""Out-of-plane Deformation of Steel Pipe Beam-Column subjected to Cyclic Horizontal Load under a Constant Small Lateral Load"" Technical Papers of Annual Meeting, Kyushu Branch of Architectural Institute of Japan. Vol.38. 521-524 (1999)

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

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Published: 1999-12-08  

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