半刚性钢框架内填组合钢板剪力墙结构抗震性能分析

Seismic behavior analysis of semi-rigid steel frame with composite steel plate shear wall structure

通过对钢板剪力墙外包混凝土盖板来提高钢板的抗屈曲能力,形成一种新型组合钢板剪力墙。为研究此种组合钢板剪力墙的抗震性能,在一榀组合钢板剪力墙低周循环加载试验的基础上,采用ANSYS软件建立非线性有限元模型,考虑影响结构抗震性能的5个主要因素:节点转动刚度、组合钢板剪力墙螺栓排布、内填钢板厚度、混凝土盖板数量及厚度,进行了5个系列15个有限元模型的变参数分析。结果表明:通过在钢板剪力墙单侧或双侧外包混凝土盖板可有效提升钢板的抗屈曲能力,增强结构的抗震性能;减少螺栓数量会提高结构的变形能力,但会降低结构的极限承载力和耗能能力;采用半刚性节点,合理设置内填钢板厚度和混凝土盖板厚度有利于结构抗震。

A new type of composite steel plate shear wall （CSPSW） was proposed, whose buckling resistance ability of steel plates is enhanced by the covered concrete plates of the steel plate shear wall. In order to study the seismic behavior of CSPSW, the non-linear FEM models were established by software ANSYS based on the low cyclic loading test of a piece of CSPSW specimen. Parameter analyses of 15 finite element models of 5 series were performed, considering 5 main influential factors of rotational stiffness of connections, configuration pattern of CSPSW bolts, infill steel plates thickness, concrete cover plate number and thickness were considered~ The results indicate that the buckling resistance ability of the steel plates is enhanced effectively by one-side or both-sides covered steel plate shear wall with concrete plates, and the seismic behavior of the structure is improved. Reduction of the number of bolts increases the deformation capacity of the structure and reduces the ultimate capacity and energy dissipation capacity of the structure. It＇s beneficial for the seismic behavior of the structure with adoption of semi-rigid joint and reasonable set of steel plate thickness and concrete cover plate thickness.