弹性-滑动减震体系地震残余位移影响因素研究

Influencing Factors of Seismic Residual Displacement of Resilient Sliding Isolation System

为确定弹性-滑动减震体系(RSI)的地震残余位移的影响因素,以一连续梁桥为工程背景,进行参数分析。采用SAP2000建立了不同支座参数的模型,对比分析残余位移等结果。在不同地震动强度下,对不同摩擦系数和不同叠层橡胶支座刚度体系的残余位移与最大位移进行了考察。结果表明,摩擦系数的减小和叠层橡胶支座刚度的增大,能增强体系的恢复能力。适当地减小摩擦系数和增大橡胶支座刚度能有效地减小体系的残余位移。此外,当最大静态残余位移和最大位移之比小于2时,体系具有良好的恢复能力。

In order to explore the influencing factors of the earthquake residual displacement of the Resilient Sliding Isolation(RSI)system,a continuous girder bridge is used as a engineering background to carry out parametric analysis in this paper.The model with different bearing parameters was established using SAP2000 to compare and analyze the results such as residual displacements.The results show that the reduction of friction coefficient and the increase of laminated rubber bearing stiffness can enhance the restoring capability of the system.Properly reducing the friction coefficient and increasing the rubber bearing stiffness can effectively reduce the residual displacement of the system.In addition,when the ratio of the maximum static residual displacement to the maximum displacement is less than 2,the system has a good restoring capability.