摘要
大型梁式渡槽由于水体质量庞大,地震作用往往成为控制该类结构设计的主要因素,选用具有隔震和耗能双重功能的摩擦摆支座对大型渡槽结构进行隔震研究,分析了摩擦摆支座的隔震效果并与普通橡胶支座的隔震效果进行了对比。计算结果表明:非线性摩擦摆支座纵横向隔震能在一定程度上大幅减小墩顶位移和墩底内力,并使槽身相对于墩顶的位移控制在可接受范围内,满足结构的抗震需求。摩擦摆支座可有效地应用于大型梁式渡槽,其减、隔震性能明显优于普通橡胶支座。
Large beam aqueduct carries a huge water mass and an analysis of earthquake action on it is always crucial to its structure design. This work studied seismic isolation of large aqueducts with friction pendulum bearings （FPBs） of dual functions, seismic isolation and energy dissipation, focusing on the isolation effect of these bearings and comparing them with ordinary rubber bearings. The results show that FPBs have a significant isolation effect due to their nonlinear behaviors, and that their longitudinal and lateral isolation causes a great reduction in both the displacement at the pier top and the internal stress at the pier bottom. As a result, it becomes easier to control the displacement of aqueduct body relative the pier top within an acceptable range so as to meet the seismic resistance goal of structure design. Thus, FPBs that are applicable to large-size aqueduct structure, are superior to ordinary rubber bearings in reducing and isolating earthquake action.
出处
《水力发电学报》
EI
CSCD
北大核心
2013年第3期213-217,共5页
Journal of Hydroelectric Engineering
基金
长江学者和创新团队发展计划(IRT1139)
国家自然科学基金(10902045)
关键词
水工结构
减隔震
非线性
摩擦摆支座
时程分析
hydro-structure
seismic isolation
nonlinearity
friction pendulum bearing
time history analysis
