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1991 Fiscal Year Final Research Report Summary

Dynamic Instability of Steel Frames under Combined Stressduring Earthquake

Research Project

Project/Area Number 02452208
Research Category

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

Allocation TypeSingle-year Grants
Research Field Building structures/materials
Research InstitutionInstitute of Industrial Science, University of Tokyo

Principal Investigator

TAKANASHI Koichi  I. I. S. Univ. of Tokyo Professor ION, 生産技術研究所, 教授 (60013124)

Co-Investigator(Kenkyū-buntansha) KOH Ki  I. I. S. Univ. of Tokyo Research Associate, 生産技術研究所, 助手 (80186600)
OHI Ken-ichi  I. I. S. Univ. of Tokyo Associate Professor ION, 生産技術研究所, 助教授 (90126003)
Project Period (FY) 1990 – 1991
KeywordsSteel Frame / Dynamic Instability / Combined Stress / Earthquak Response / Beam-Column
Research Abstract

Steel beam-columns were tested under biaxial and uniaxial bending and varying, axial load as well. Three kinds of loading, types were applied : (1) monotonic loading tests, (2) cyclic loading tests, and (3) computer on-line earthquake response tests. Observations in these tests can be used to check the design formulae for the resistance as well as the deformability of steel members, and also to study an appropriate limitation of axial forces in the beam-column design practice.
Additionally, an inelastic portion of a steel beam-column is modeled as an assembly of spring elements, and a simple hysteresis rule is proposed to simulate its inelastic behavior in including the strain-hardening and the Bauschinge's effects. Analyses based on such a model were carried out for each loading cases, and compared with the test results. The results of the analyses proved to agree fairly well with the test results. Especially in the case of the cyclic loading test, very large deformation was observed i … More n the direction where displacement was not constrained, and even such an unstable phenomenon was well simulated by the present analysis.
The results of this research project are summarized as follows :
1. A computer-controlled testing system was developed to provide varying combined stress states to a beam-column specimen, which would be produced in a specified member of a fictitious complicated structural system such as a high rise building. The effectiveness and the accuracy of such an intelligent loading system were confirmed during all the test procedures.
2. An existing design formula to evaluate the resistance of steel beam-columns under biaxial bending and axial load was compared with the test results, and proved to give a conservative evaluation for the axial load smaller than 60 percent of the yield axial load. However, more accurate evaluation of the resistance may be needed in the ultimate limit state design of the beam-columns, and this shall be studied by more extensive sets of experiments and analyses.
3. In some of the cyclic loading tests, considerable amounts of plastic deformation were cumulated in the out-of-plane direction. Such an out-of-plane instability shall be investigated more carefully.
4. The analysis method based on an inelastic joint model proved to provide a good prediction of the resistance and the deformability of steel beam-columns under combined stress states. Such a modeling can be applied, because of its simplicity, to the analysis on large-scale 3-dimensional steel frames. Less

  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] 金 鍾声,高梨 晃一,洪 起: "柱材の細長比及び制限に関する一考察" 日本建築学会大会学術講演梗概集. C. 1461-1462 (1990)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 近藤 日出夫,陳 以一,大井 謙一,高梨 晃一: "複合応力状態におけるH形鋼柱の耐力劣化現象(その1 実験報告)" 日本建築学会関東支部1991年度研究発表会研究報告集. (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 陳 以一,近藤 日出夫,大井 謙一,高梨 晃一: "複合応力状態におけるH形鋼柱の耐力劣化現象(その2 解析報告)" 日本建築学会関東支部1991年度研究発表会研究報告集. (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 大井 謙一,陳 以一,高梨 晃一: "変動軸力と水平力を受けるH形鋼柱の弾塑性挙動に関する実験的研究" 構造工学論文集. (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Ken-ichi OHI,Koichi TAKANASHI,Yiyi CHEN,Hideo KONDO: "Intelligent Loading Test on Steel Beam-Colulmns under varying Axial and Lateral Loads" Bulletin of Earthquake Resistant Structure Reserch Center Institute of Industrial Science,University of TOKYO. (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Koichi TAKANASHI,Ken-ichi OHI,Linghua MENG,Yiyi CHEN: "Collapse simulation of Steel frames with local buckling" Proceeding of 10th World Conference on Earthquake Engineering. (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Kim Jong-Sung, Koichi TAKANASHI and Ki KOH: "A discussion on the limitations of axial forces and the slenderness ratios of steel column" Summaries of Technical Papers of Annual Meeting, A. I. J.C. 1461-1462 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Hideo KONDO, Yiyi CHEN, Ken-ichi OHI and Koichi TAKANASHI: "Resistance Deterioration of H-Shaped Members Subject to Combined Stresses - Part 1. Loading Test" Proceeding of The 62th Architectural Research Meeting, KANTO CHAPTER. A. I. J. 97-100 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Yiyi CHEN, Hideo KONDO, Ken-ichi OHI and Koichi TAKANASHI: "Resistance Deterioration of H-Shaped Members Subject to Combined Stresses - Part 2. Analysis" Proceeding of The 62th Architectural Research Meeting, KANTO CHAPTER. A. I. J. 101-104 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Ken-ichi OHI, Yiyi CHEN and Koichi TAKANASHI: "An Experimental Study on Inelastic Behaviors of H-Shaped Steel Beam-Column Subject to Varying Axial and Lateral Loads" Journal of Structural Engineering. 1.38B. (1992)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Ken-ichi OHI, Koichi TAKANASHI, Yiyi CHEN and Hideo KONDO: "Intelligent Loading Test on Steel Beam-Colulmns under varying Axial and Lateral Loads" Bulletin of Earthquake Resistant Structure Research Center, I. I. S. Univ. of Tokyo. No. 25. (1992)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Koichi TAKANASHI, Ken-ichi OHI, Linghua MENG and Yiyi CHEN: "Collapse simulation of Steel frame with local buckling" Proceeding of 10th World Conference on Earthquake Engineering. (1992)

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

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Published: 1993-03-16  

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