三维基础隔震结构非线性地震能量响应分析  

Analysis on nonlinear seismic energy response for 3-D base-isolated structures

作　　者：汪洁[1] 李宇[2] 

机构地区：[1]西安建筑科技大学结构工程与抗震教育部重点实验室,陕西西安710055 [2]长安大学公路学院,陕西西安710064

出　　处：《西安建筑科技大学学报（自然科学版）》2013年第3期367-370,共4页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51078306);陕西省重点学科建设专项资金资助项目(E01004);中央高校基本科研业务费专项资金项目(CHD2011JC003)

摘　　要：建立了基础隔震结构的地震能量响应方程,利用有限元分析软件模拟了铅销橡胶支座的双向非线性性能,研究了铅销橡胶支座主要参数和不同地震动激励对基础隔震结构非线性地震能量响应的影响.结果表明:(1)铅销橡胶支座的滞回耗能能够消耗大量的地震总输入能,进而证实了其减隔震的有效性;(2)铅销直径和刚度比对其减隔震能力的有较大影响;(3)不同特性的地震动对结构的地震能量响应影响显著.The energy equations of the base-isolated structures are established based on the energy equilibrium theory.Considering the effect of principal parameters of lead rubber bearing and dissimilar seismic motions,dimensional FEA model of base-isolated structures is established.The seismic energy response analyses for base-isolated structures are carried out under the three-dimensional seismic motions.Results are obtained as follows.（1）Most of the seismic input energy can be consumed by the hysteretic energy dissipation of lead rubber bearing.（2）Lead core diameter or stiffness ratio have great effect on seismic energy response of base-isolated structure.（3）The seismic energy response of base-isolated structure is greatly discrepant under different seismic motions.

关 键 词：铅销橡胶支座 地震能量响应 地震能量方程 基础隔震结构 滞回耗能 

分 类 号：U443.361[建筑科学—桥梁与隧道工程]