摘要
应用Wen微分型恢复力模型与双线性恢复力模型,分别模拟铅芯橡胶隔震支座的非线性滞回恢复力特性.采用时程分析的方法,对南水北调水泉沟大型渡槽进行了横向地震非线性反应分析.计算结果表明:两种方法计算所得结果相符.采用铅芯橡胶支座隔震后,渡槽上部结构运动特性得到改善:地震反应加速度减小,槽身与支座的相对位移减小.槽身近似作刚体平动;槽墩墩顶位移、加速度及墩底弯矩、剪力减小.研究表明设置铅芯橡胶支座对渡槽的横向地震起到了明显的控制作用,计算结果对渡槽减隔震设计有一定的参考价值.
Bilinear hysteretic model and Wen hysteretic model are applied to simulate the hysteretic characteristics of LRB herein, and the nonlinear lateral seismic responses of Shuiquangou aqueduct-a large-scale aqueduct in South-to-North Water Transfer Project are analyzed with time history analysis method .The calculated results from two methods are identical, which show: the motion characteristic of the aqueduct superstructure is improved with seismic LRB, by which the seismic acceleration is decreased and the relative displacement between the bearing and the aqueduct body is reduced as well. The aqueduct body moves like a rigid body, while the top displacement with the acceleration of the pier and the bottom shearing force with the bending moment of the pier are reduced at the same time. The study shows that LRB is effective in controlling the lateral seismic responses of the aqueduct, which can be taken as a useful reference for the seismic design of the aqueducts concerned.
出处
《水利水电技术》
CSCD
北大核心
2005年第3期28-30,34,共4页
Water Resources and Hydropower Engineering
基金
河南省高校杰出科研人才创新工程(2003KYCX011 )
河南省科技攻关资助项目(0224370025).
关键词
铅芯橡胶支座
非线性时程分析
恢复力模型
地震反应
lead rubber bearing
nonlinear time history analysis
hysteretic model
seismic response
