单层球面网壳结构的柱顶隔震研究  

A STUDY OF TOP-COLUMN SEISMIC ISOLATION FOR SINGLELAYER RETICULATED DOMES

作　　者：胡苇[1] 任红梅 陈贻辉 翟永梅[4] 

机构地区：[1]同济大学土木工程学院,上海200092 [2]上海市浦东新区建设工程设计文件审查事务中心,上海201204 [3]上海中建建筑设计院有限公司,上海200122 [4]同济大学上海防灾救灾研究所,上海200092

出　　处：《防灾减灾学报》2016年第1期8-14,共7页Journal of Disaster Prevention And Reduction

基　　金：国家科技支撑计划课题(2012BAJ11B01)

摘　　要：以带下部混凝土支承结构的单层联方型球面网壳为研究对象,针对工程实际中支承刚度过强的情形,提出了柱顶隔震的方法,从而改善了整体结构的抗震性能。非线性时程分析表明,多遇地震作用下LRB能在一定程度上降低支座反力,且使支座反力分布趋于均匀,降低了支座设计的要求;罕遇地震作用下LRB支座基本进入塑性状态,支座反力维持在屈服力附近,与原结构相比有大幅度的降低,支座滞回曲线饱满,同时上部网壳的塑性发展程度大大减轻,基本保持为弹性,取得了良好的减震效果。The research object of this article is single-layer reticulated domes with the concrete supporting structure, in view of the situation that has strong support stiffness in the practical engineering, put forward to improve the performance of the structure in seismic through the method of top-column seismic isolation. Nonlinear time history analysis shows that, under small seismic LRB can reduce the reaction force, and the support reaction force distribution uniform, reduce the bearing design requirements; under major seismic LRB support get into the plastic state, the support reaction force is maintained in the yield force nearby, and is lower than the original structure, hysteresis loop of support is full, while the upper part of the shell plastic development greatly reduced, is essentially elastic, achieved good seismic absorption effect.

关 键 词：柱顶隔震 单层网壳结构 非线性时程分析 减震 

分 类 号：P315.9[天文地球—地震学]