方钢管混凝土穿芯螺栓-端板节点抗震性能试验研究

对3个穿芯螺栓-端板连接节点试件进行了伪静力试验研究,研究了轴压比分别为0.20、0.25、0.30时节点的滞回性能、强度及刚度退化、延性性能、耗能性能及破坏特征.试验结果表明,试件的层间位移延性系数为2.38~2.45,弹性及弹塑性层间位移角分别为0.0140~0.0158 rad、0.341~0.0377 rad,能量耗散系数为2.567~3.820.节点试件均为梁端形成塑性铰而破坏,节点具有很好的强度、刚度、延性及耗能能力,满足现行抗震规范GB50011-2001的要求.提出了相关的设计及研究建议.

Study on the seismic behaviour of through-bolt-end plate moment connections for concrete-filled steel tube column

A total of three experimental specimens of through-bolt-end plate beam-to-column connections consisting of concrete-filled square steel tube column and H-shaped beams have been tested under low-cyclic reversed loading to invesigate the hysteric behavior,the strength and stiffness degradation,the energy dissipation capacity and the failure modes.The only difference of all specimens was with the axial compression ratio.Experimental results show that the story drift ductility ratios reached 2.38~2.45,the elastic and elasto-plastic story angular drift reached 0.0140~0.0158 and 0.0341~0.0377rad respectively,and the energy dissipation ratios attained 2.561~3.820.The experimental results also demonstrate that all specimens developed plastic hinges at the end of beams and provided superior seismic resistance in strength,stiffness,ductility and energy dissipation capacity.These results indicate that the seismic resistance exceeds that specified in Chinese Code GB50011-2001.Additional antiseismic design and research recommendations are presented.