【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。更多还原

【Abstract】 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.更多还原