A study on behavior of steel square tube under bending moment and axial force : Especially talking notice of ultimate behavior and stress condition close to diaphragm

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  • せん断力と軸力が比例して変動する繰返し載荷を受ける角形鋼管柱の弾塑性挙動と柱はり接合部近傍の応力履歴に関する研究

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This paper describes behavior of beam - column that was made of a cold - rolled steel square tube under proportionally varying axial and lateral loads. Main findings were as follows. 1) Width-thickness ratio (B/t) is a big factor of ruling ultimate strength. 2) Axial force - shear force ratio doesn't have influence on the ultimate strength. We paid attention to the hysteresis of strain and stress at the bottom of the column. We calculated the stress hysteresis from strain hysteresis and found that the bottom of the column is under the influence of being restrained by the diaphragm.

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