方钢管混凝土框架内置侧边开洞薄钢板剪力墙的抗侧承载力研究

摘要

The quasi-static test was conducted on one 1/3 scale one-bay two-story concrete-filled square steel tubular frame-thin steel plate shear wall with side opening(SPSW-SO).The nonlinear analytical analysis was conducted using the finite element package ABAQUS.Based on the experimental and analytical results,the mechanical behavior and failure mechanism of the concrete-filled square steel tubular frame-thin SPSW-SO were studied.The effect of different connection types between the boundary members and frame beams on the structure was studied.Based on the failure mechanism of the SPSW-SO,the analytical model and simplified calculating formula of the lateral force resistant capacity of the SPSW-SO were proposed.The formula results were compared with those of the experimental and full size finite element model.The results show that the concrete-filled square steel tubular frame-thin SPSW-SO has considerable lateral-resisting capacity,initial stiffness and favorable energy dissipation capacity.The formula results agree well with the experimental and numerical results.%对1榀1/3比例的单跨2层方钢管混凝土框架内置侧边开洞薄钢板剪力墙进行了拟静力试验.利用有限元软件ABAQUS对其进行了非线性数值分析,结合试验结果,分析了方钢管混凝土框架内置侧边开洞薄钢板剪力墙的受力机理和破坏机制.研究了洞口边缘构件与边框梁不同连接方式对结构抗侧承载力的影响.基于侧边开洞薄钢板剪力墙的受力机理,提出了方钢管混凝土框架内置侧边开洞薄钢板剪力墙的抗侧承载力计算模型及计算公式,并与试验及足尺有限元模型结果对比.结果表明:方钢管混凝土框架内置侧边开洞薄钢板剪力墙具有较高的承载力、初始刚度和延性,抗侧承载力公式计算结果与试验及有限元结果吻合较好.