层间隔震结构在主余震型地震作用下的响应分析  

Response Analysis of Interlayer Isolation Structures Under Mainshock-aftershock Seismic Sequences

作　　者：曾杰 王中强 ZENG Jie;WANG Zhongqiang

机构地区：[1]长沙理工大学土木工程学院,湖南长沙410114

出　　处：《重庆建筑》2024年第12期66-69,共4页Chongqing Architecture

摘　　要：建立大底盘单塔层间隔震结构的SAP2000数值模型,将隔震结构模型与抗震结构模型模态分析结果进行对比分析,选取20条真实主余震序列型地震动,选取层间位移和楼层剪力作为响应指标进行分析。结果表明:在多遇地震下,单主震作用和主余震序列作用下结构动力响应变化趋势大致相同,并且结构在主余震序列地震动作用下其响应略大于单一主震。在罕遇地震下,结构在主余震序列地震动作用下的动力响应明显大于单一主震。说明余震的作用使层间隔震结构的响应增大、损伤增加,且随着地震强度等级的增加,余震对层间隔震结构的影响更明显。A numerical model of an interlayer isolation structure with a single-tower and large podium was established using SAP2000.The modal analysis results of the isolation structure model were compared with those of a seismic structure model.Twenty real mainshock-aftershock seismic sequences were selected,with interlayer displacement and floor shear force used as response indicators for analysis.The results indicate that under frequent earthquakes,the structural dynamic response trends are generally similar for both single mainshocks and mainshock-aftershock sequences,with slightly larger responses observed under mainshock-aftershock sequences.For rare earthquakes,the dynamic response of the structure under mainshock-aftershock sequences is significantly greater than that under a single mainshock.This suggests that aftershocks amplify the response and damage of interlayer isolation structures,with the impact becoming more pronounced as the earthquake intensity increases.

关 键 词：层间隔震结构 SAP2000 主余震 动力响应 

分 类 号：TU352.12[建筑科学—结构工程]