双柱式自复位桥梁结构横桥向抗震性能研究

Study on the seismic performance of double-column self-resetting bridge structure in cross-bridge direction

本文采用OpenSees有限元分析软件对双柱式自复位桥墩结构进行非线性分析。在桥墩底部接缝处采用基于零长度单元模拟方法模拟接缝张开闭合情况,并对双柱式自复位桥墩进行PushOver分析及拟静力滞回反应分析。结果表明,通过改变桥墩初始预应力和高宽比对双柱式自复位桥梁的抗震性能影响显著,重力轴压比和桥墩间距对其影响较小。

In this paper,OpenSees finite element analysis software is used to perform nonlinear analysis on the structure of double column self-resetting piers.The zero length element method is used to simulate the opening and closing of the joint at the bottom of the piers,and Pushover analysis and proposed static hysteresis response analysis are performed on the double-column self-resetting piers.The results show that the seismic performance of the double-column sself-resetting bridge is significantly affected by changing the initial prestress and height-to-width ratio of the piers,while the gravity axial compression ratio and the spacing of the piers have less effect.