摘要
应用减隔震支座进行连续梁桥的抗震设计时,可通过支座参数的合理选择实现结构的抗震性能优化。针对一工程实例,进行系统的有限元仿真分析,研究铅芯橡胶支座设计参数优化问题。数值计算结果表明,铅芯橡胶支座的屈服强度对结构的内力和位移响应有较大影响;结构的内力和位移响应的降低与支座耗能率相关,其最大响应值随耗能率的增大而有不同程度的减小。建议根据支座耗能率进行隔震梁桥的支座参数优化,实现内力和位移响应量的同时降低。
The seismic performance of the bridge is optimized by the reasonable selection of the support parameters. In this paper, the design parameter optimization of lead core rubber bearings is studied. The numerical results show that the yield strength of lead rubber bearings has great influence on the internal force and displacement response of the structure. The decrease of the internal force and displacement response of the structure is correlated with the energy dissipation rate of the support, and its maximum response value decreases with the increase of energy dissipation rate. It is suggested to optimize the support parameters of the isolation bridge based on the energy consumption of the support, and reduce the internal force and the displacement response.
作者
李为
李万里
孟祥勇
LI Wei;LI Wanli;MENG Xiangyong(Earthquake Engineering Research ＆ Test Center of Guangzhou University,Guangzhou 510405,China;Southwest Jiaotong University Civil Engineering Design Co.LTD,Chengdu 61003,China)
出处
《华南地震》
2018年第2期35-39,共5页
South China Journal of Seismology
关键词
铅芯橡胶支座
连续梁桥
地震响应
耗能率
Lead core rubber bearing
Continuous beam bridge
Earthquake response
Power consumption rate
