一定軸方向力と対称曲げ・非対称曲げを受ける鉄骨鉄筋コンクリート長柱の弾塑性挙動

日本建築学会

書誌事項

タイトル別名
  • INSTABILITY BEHAVIOR OF CONCRETE ENCASED STEEL LONG COLUMNS UNDER COMPRESSION AND EQUAL OR UNEQUAL END MOMENT

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This paper discusses the maximum load carrying capacity and instability behavior of the concrete encased steel long columns subjected to constant axial compression and equal or unequal end moments. Column slenderness, end moment ratio and the magnitude of axial force are taken as the variables in the experiments. 27 specimens were tested. Load-deflection relationships is numerically analyzed using a discrete element model on the basis of the multi-linear m-n-φ relationship. It is confirmed that the length of the discrete element does not affect very much on the load-deflection relationships until the maximum strength is reached, however, the length of the elements should be nearly equal to the depth of the column section to simulate the behavior accurately in the failing stage. Finally, the stable factor is proposed to distinguish whether the failure mode is material failure or unstable failure.

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