摘要
针对铁路桥梁减隔震设计的关键技术,给出了铅芯橡胶支座的等效线性模型及主要动力参数的计算方法,建立了高速铁路车桥系统全桥模型,计算了隔震前后高速铁路桥梁的动力响应,分析了铅芯橡胶支座(LRB)的隔震效果.分析结果表明:当支座动力参数选择适当时,采用隔震装置既可有效降低墩底弯矩剪力等动力响应,又不增加梁体位移和支座变形,起到良好的隔震耗能效果.
Aimed at the key technology of railway bridge seismic isolated designs, the equivalent linear model and the calculation method of main dynamic parameters of the lead rubber bearings were presented. The finite element model of the vehicle-bridge system was established. The dynamic responses of pre-seismic and post-seismic isolation of bridge were calculated and the seismic isolation effect of the lead rubber bearings was analyzed. The calculation results indicate that the lead rubber bearings has excellent performance in seismic isolation and energy dissipation, the bending moment and shear force of pier bottom of bridge can be effectively decreased, and the displacement of grider and bearings do not increase when dynamic parameters of the lead rubber bearings are reasonably determined.
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2012年第1期77-81,共5页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
铁道部重大课题资助项目(2008G031-17
2009G-024)
中央高校基本科研业务费专项基金资助项目(20117Q008)
关键词
桥梁
高速铁路
隔震
铅芯橡胶支座
隔震
bridge
high-speed railway
seismic isolation
lead rubber bearings
seismic isolation
