上部结构（偏心）对基础滑移隔震结构平－扭耦联地震反应的影响

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振动与冲击 ›› 2009, Vol. 28 ›› Issue (12) : 96-100.

论文

上部结构（偏心）对基础滑移隔震结构平－扭耦联地震反应的影响

王建强1;丁永刚2;李大望3

作者信息 +

Lateral-torsional coupled seismic response of sliding base-isolated structuresdue to the eccentric superstructure

Wang Jian-qiang1;Ding Yong-gang2;Li Da-wang3

Author information +

文章历史 +

摘要

本文对多层基础滑移隔震结构进行了水平双向地震作用下的平－扭耦联地震反应分析，研究了上部结构偏心和上部结构抗扭刚度对结构地震反应的影响，分析表明上部结构质量偏心较上部结构刚度偏心对基础滑移隔震结构地震反应的影响更大，因而应减小上部结构质量中心与隔震层质量中心和刚度中心的偏心距，以减小结构的扭转反应；当上部结构的质量偏心距较小时，其对基础滑移隔震结构的地震反应也有一定程度的影响，在结构设计应予以考虑；上部结构的抗扭刚度对上部结构的地震反应影响较大，增大上部结构的抗扭刚度可有效减小上部结构的地震反应，但上部结构的抗扭刚度对隔震层的地震反应影响较小。

Abstract

Lateral-torsional coupled seismic response of sliding base-isolated structures under bi-axial ground excitations is carried out. The influence of eccentricity and torsional stiffness in the superstructure is studied. It is shown that the influence of the mass eccentricity in the superstructure is more remarkable than that of the stiffness eccentricity in the superstructures. The seismic response of the base-isolated structure can be effectively diminished by decreasing the mass eccentricity in the superstructure. Even though the mass eccentricity is small, the influence of which should be take into account in the design of the base-isolated structure. The torsional stiffness of the superstructure has great impact on the response of the superstructure than which on the response of the isolation layer. Seismic response of the superstructure can be effectively diminished by increasing the torsional stiffness of superstructure.

导出引用

王建强;丁永刚;李大望. 上部结构（偏心）对基础滑移隔震结构平－扭耦联地震反应的影响[J]. 振动与冲击, 2009, 28(12): 96-100

Wang Jian-qiang;Ding Yong-gang;Li Da-wang. Lateral-torsional coupled seismic response of sliding base-isolated structuresdue to the eccentric superstructure[J]. Journal of Vibration and Shock, 2009, 28(12): 96-100

中图分类号： TU352.1