ノンダイアフラム円形鋼管柱－梁フランジ接合仕口の小振幅繰返し挙動

抄録

 Cyclic out-of-plane behaviors of cylindrical wall at non-diaphragm connection of CHS-column to beam flange were experimentally investigated, in that small amplitudes below and above the yield strength were loaded. Two specimens of heat-treated CHS survived the entire 75 cycles, while other four specimens collapsed on the way of cycles. The failure took place under compressive loading in association with cracking developed during the preceding tensile loadings, while they sustained many cycles prior to the final failure. Elastic stiffness and yield strength of the connection held almost the same levels of initial loading during the cyclic loadings unless the connection experiences the loads higher than the initial yield strength, which suggests that the elastic stiffness and yield strength can be assumed constant for allowable stress design.