摩擦摆基础隔震上部偏心结构地震反应影响因素分析  

Analysis on the seismic response of the structure isolated by FPS with an asymmetric superstructure

作　　者：王建强[1] 金建洲[1] 丁永刚[2] 李大望[3] 

机构地区：[1]郑州大学土木工程学院,河南郑州450001 [2]河南工业大学土木建筑学院,河南郑州450052 [3]深圳大学土木工程学院,广东深圳518060

出　　处：《世界地震工程》2010年第1期99-104,共6页World Earthquake Engineering

基　　金：国家自然科学基金项目(50478050);河南省高等学校青年骨干教师计划项目

摘　　要：对上部结构存在偏心的摩擦摆基础隔震结构进行了水平双向地震作用下的地震反应分析,研究了上部结构偏心距和抗扭刚度对结构地震反应的影响。分析表明:上部结构偏心距对上部结构和隔震层的位移反应和加速度反应均有较大影响,即使在上部结构偏心距较小时,其对结构地震反应仍有一定程度的影响;上部结构的抗扭刚度对上部结构的加速度反应影响较小,而对上部结构的位移反应影响较大;上部结构的抗扭刚度对隔震层的加速度反应和位移反应影响较小。因而,对于上部结构存在偏心的摩擦摆基础隔震结构,应减小上部结构偏心距并增大其抗扭刚度以减小摩擦摆基础隔震结构的扭转反应。The seismic response of the structure isolated by friction pendulum system（FPS）with an asymmetric superstructure under bilateral ground motions is analyzed.The effects of the eccentricity and the torsional stiffness on the superstructure are studied.It is shown that the effect of the eccentricity of the superstructure on the displacement and the acceleration of the superstructure and the isolation layer is remarkable.Even though the eccentricity is small,the effect of which should be taken into account in the seismic design of the base-isolated structure.The effect of the torsional stiffness of the superstructure on the seismic response of the superstructure is more remarkable than that on the seismic response of the isolation layer.So the seismic response of the superstructure can be effectively diminished by decreasing the eccentricity and increasing the torsional stiffness of the superstructure.

关 键 词：基础隔震结构 摩擦摆支座 上部结构偏心距 上部结构抗扭刚度 

分 类 号：TU352.1[建筑科学—结构工程] P315.066[天文地球—地震学]