抗弯框架-钢板剪力墙结构体系抗震性能研究

Seismic behavior of moment-resisting steel frame-steel plate shear wall structure system

基于等效拉杆理论和静力弹塑性分析法,对8层钢板剪力墙结构进行了静力推覆分析,在节点铰接和刚接连接形式下,分析了结构层间剪力分配、荷载-位移曲线、塑性铰出现顺序等指标,研究了节点刚度变化对结构整体性能的影响。结果表明:三跨刚接模型中,剪力墙承担约65%水平剪力,钢框架承担约35%,梁柱铰接后承载力降低29%左右。单跨刚接模型中,剪力墙承担约80%水平剪力,钢框架承担约20%,梁柱铰接后承载力降低9%左右。梁柱刚接为双重抗侧力体系,相邻跨框架能提供有效刚度,节点连接形式对结构承载力的影响不容忽视。

Based on equivalent strip theory and static elastic-plastic analysis,the static pushover analysis of the eight-story steel plate shear walls was made.According to the node hinging and rigid connection form,the internal shear force distribution,load-displacement curve and appearing order of plastic hinges were analyzed.The influence of the change of the joint stiffness on the overall performance of the structure was researched.The results show that for the three-span rigid model,the shear wall bears approximately 65% and the frame bears about 35% of shear level,the carrying capacity reduces by 29% after the hinge connection;for the single-span rigid model,the shear wall bears approximately 80% and the frame bears about 20% of shear level,the carrying capacity reduces by 9%.The beam-column rigid connection is the double lateral force resisting system.As the adjacent frames can provide the effective stiffness,the node connection form for bearing capacity of the structure can not be ignored.