并联复合隔震体系的地震耗能机制和能量响应分析  

Analysis of seismic energy dissipation and energy response for parallel composite isolation system

作　　者：袁颖[1] 周爱红[1] 林皋[2] 

机构地区：[1]石家庄经济学院勘查技术与工程学院,河北石家庄050031 [2]大连理工大学土木水利学院,辽宁大连116023

出　　处：《世界地震工程》2014年第2期36-42,共7页World Earthquake Engineering

基　　金：国家自然科学基金资助(41204075);国家大坝工程技术研究中心开放基金资助(NDSKFJJ1201);石家庄经济学院国家自然科学基金预研基金(SYY201308)

摘　　要：运用能量分析法对并联复合隔震体系的地震耗能机制和能量响应进行了分析和探讨。首先,以层间剪切模型的多自由度运动微分方程为基础,建立了并联复合隔震体系的能量平衡方程。其次,引入状态空间法对并联复合隔震体系进行时程分析得到体系的地震响应,并以此为基础计算了各项能量。最后,以7质点多自由度体系为仿真对象,对并联复合隔震体系的耗能机制及其主要隔震层参数和不同特性地震动对能量响应的影响进行了分析。结果表明,并联复合隔震体系地震总输入能主要由滞回耗能和阻尼耗能承担;摩擦承压比和摩擦系数对能量响应有重要影响,存在最优取值区间;地震能量响应受地震动特性影响较大。By the use of energy method, the seismic energy dissipation mechanism and energy response of parallelcompositon isolation system were analyzed and discussed. Firstly, on the basis of multi-degree-of-freedom motiondifferential equation for story shear model, the energy equilibrium equation of parallel composite isolation systemwas established. Secondly, the state space method was introduced to perform the time history analysis so as to ob-tain seismic responses of the above system, and on this basis, different energy items were calculated. Finally, tak-ing a seven-degree-of-freedom system for an illustrative example, the energy dissipation mechanism of the parallelcomposite isolation system was analyzed; the effects of its main parameters of isolated layer and the characteristicsof different earthquake ground motions on seismic energy response of parallel composite isolation system were dis-cussed. The results show that total seismic energy input of parallel composite isolation system is mainly borne by thehysteretic energy dissipation and damping energy dissipation; Friction bearing ratio and friction coefficient has im-portant effects on the seismic energy responses, and there are optimal ranges of their values ; the seismic energy re-sponses are greatly influenced by the earthquake ground motion characteristics.

关 键 词：并联复合隔震 状态方程法 能量时程 摩擦承压比 摩擦系数 

分 类 号：TU352.1[建筑科学—结构工程]