地震动速度脉冲对巨型结构体系地震响应影响研究  

Influence of a Near-fault Velocity Pulse on the Seismic Response of a Mega Structural System

作　　者：李祥秀[1] 李小军[1,2] 刘爱文[1] 贺秋梅[1] 王玉石[1] LI Xiangxiu;LI Xiaojun;LIU Aiwen;HE Qiumei;WANG Yushi(Institute of Geophysics, China Earthquake Administration, Beijing 100081, China;The College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100022, China)

机构地区：[1]中国地震局地球物理研究所,北京100081 [2]北京工业大学建筑工程学院,北京100022

出　　处：《地震工程学报》2017年第5期843-852,共10页China Earthquake Engineering Journal

基　　金：北京市自然科学基金资助项目(8174081);国家自然科学基金(51608491;U1434210)

摘　　要：以巨-子结构抗震体系、隔震体系以及智能隔震体系为研究对象,选择4组具有速度脉冲特性的实际地震动加速度记录及人工模拟的具有相同加速度反应谱而无速度脉冲的地震动时程分别作为地震动输入,采用数值分析方法分别计算在有、无速度脉冲的地震动激励下三种结构体系的地震响应,探讨地震动的速度脉冲对巨型结构体系在不同控制策略下地震响应的影响。研究结果表明:三种结构体系在速度脉冲型地震动作用下的地震响应大部分要大于无速度脉冲型的地震响应,近断层地震动的速度脉冲对巨-子结构抗震体系、隔震体系以及智能隔震体系的地震响应均有一定的不利影响。智能隔震体系对速度脉冲地震动较为敏感,但能有效地减小隔震层位移。The seismic responses of the seismic,isolation,and smart isolation systems of a mega structure were calculated and comparatively analyzed.Four groups of actual strong motion records with velocity pulses and corresponding synthetic time histories of ground motion with the same acceleration response spectra but without velocity pulses were used as ground motion inputs.Then,the influence of ground motion with and without velocity pulses on the mega structure under different control strategies was discussed.The results show that the seismic response of the mega structure's underground motion with a velocity pulse is greater than that without velocity pulse;in addition,the velocity pulse of near fault ground motion has some negative impact on the seismic response of its seismic,isolation,and smart isolation systems.Though a mega structure with intelligent control system is more sensitive to ground motion with a velocity pulse,it can effectively reduce the displacement of the isolation layer.

关 键 词：巨型结构体系 强震动记录 速度脉冲 智能控制 被动控制 

分 类 号：TU352.1[建筑科学—结构工程]