利用蝴蝶形钢板剪力墙耗能的自复位结构体系研究

Research on self-centering system of energy consumption of steel shear walls with butterfly-shaped links

应用ANSYS软件对利用蝴蝶形钢板剪力墙耗能的自复位结构体系进行了有限元模拟,主要研究了钢绞线预拉力值、蝴蝶板厚度、蝴蝶板中开缝区短柱高厚比L/t、蝴蝶板中开缝区短柱宽厚比b/t等参数对结构自复位能力、承载力、抗侧刚度、耗能能力以及延性性能的影响。分析结果表明,通过合理的参数设计,利用蝴蝶形钢板剪力墙耗能的自复位结构体系能够把塑性变形集中在蝴蝶板中,使框架梁柱处于弹性状态,在地震作用后没有残余变形,能够方便快速地修复;并且拥有较高的抗侧刚度、承载力,较强的耗能能力和较好的延性性能。钢绞线初始预拉力值对结构复位能力影响较大,蝴蝶板厚度以及蝴蝶短柱高厚比、宽厚比对结构抗侧刚度、承载力、耗能能力以及延性影响较大。

The paper presented the finite element simulation of the self-centering system of steel plate shear walls （SC-SPSW） with butterfly-shaped links by ANSYS, and studied the influence of the initial value of pretension of steel strand, the steel plate shear wall thickness, butterfly short column height to thickness ratio L/t, butterfly short columns width-thickness ratio b/t and other parameters on the self-centering ability, bearing capacity, lateral stiffness, energy dissipation capacity and ductility. The results show that, through the reasonable design of parameters, the self-centering system with steel plate shear wall with butterfly-shaped links can make the plastic deformation focus on the butterfly-shaped links and the columns in a elastic state, and then return to the initial state after earthquake; and also has high rigidity, strong bearing capacity, energy dissipation capacity and better ductility performance. The steel strand initial pretension value greatly influences the self-centering ability; and the thickness of the butterfly plate, the ratio of the butterfly short column height-thickness, the width-thickness ratio greatly influence the lateral stiffness of the structure, bearing capacity, energy dissipation capacity and ductility performance.