论文部分内容阅读
为了研究考虑与不考虑铅芯橡胶支座(LRB)恢复力双向耦合作用对结构地震响应的影响,采用Bouc-Wen模型模拟LRB恢复力的双向耦合特性,采用Wen模型模拟LRB恢复力的单向特性,建立了考虑与不考虑LRB恢复力双向耦合作用的两种全桥有限元模型,编制了运用Newmark时间积分法和四阶显式Runge-Kutta迭代法联合求解全桥非线性运动方程的时程分析程序。利用程序并结合算例对两种模型进行了非线性时程对比分析。分析结果表明:不考虑双向耦合作用将会对梁体位移和LRB自身位移产生过小估计;考虑双向耦合作用不会对墩顶位移、梁体加速度和墩底内力产生过大估计。
In order to study the effect of two-way coupling with and without the LRB on the seismic response of the structure, the Bouc-Wen model was used to simulate the bidirectional coupling characteristics of LRB restoring force and the Wen model was used to simulate the unidirectional Two finite element models of two full bridges with or without considering LRB restoring force are established and the method of combining the Newmark time integral method and the fourth order explicit Runge-Kutta iteration method to solve the nonlinear motion equation Cheng analysis program. By using the program and combining the examples, the two models are compared and analyzed by nonlinear time history. The analysis results show that the bidirectional coupling effect will have underestimation of beam displacement and LRB displacement. Considering the bidirectional coupling effect, it will not overestimate the displacement of top of pier, the acceleration of beam body and the internal force of pier bottom.