用于自复位结构的新型钢板剪力墙的抗震性能分析

Seismic performance study of new shaped plate applied in self-centering steel frame

为了研究薄钢板在自复位钢结构中的耗能以及复位能力,提出了一种新型钢板剪力墙。对其构造和工作原理进行了详细说明。通过有限元软件ANSYS对不同厚度的5个试件模型进行模拟,得出滞回曲线、骨架曲线、耗能曲线、承载力退化曲线及刚度退化曲线。随后,围绕着结构的强度、刚度、延性和复位性能,展开参数分析。分析结果表明:两侧加劲方管能有效约束试件的面外变形,使结构具有良好的复位效果;随着钢板厚度t的增加,整体结构的耗能能力和承载能力也会增强,但是复位性能会变差。

A new shaped steel ty in self-centering steel fram plate wall is put forward to study the energy dissipation and self-centering capacies. The configuration and mechanism of this new system are explained in detail With the ANSYS software, five specimens in different thickness are simulated, and the hysteretic curve, the skeleton curve, the energy dissipation coefficient curve, the stiffness degradation curve and the bearing capacity degradation curve can be obtained. The parameter analysis of the strength, stiffness, ductility and recentering performance of the structure are carried out. The results show that stiffened square tubes on both sides can effec- tively restrain the out-to-plane deformation of specimens, ensuring that the frame has good recentering capacity. With the increase of plate thickness, the energy dissipation capacity and the loading capacity of the structure will be enhanced, but the recentering performance will be poor.