基础滑移隔震体系滑移位移谱研究  

Study of the sliding displacement spectrum on the sliding base isolation structure

作　　者：熊仲明[1] 陈轩[1] 虞子良 

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055 [2]深圳市建筑设计研究总院,广东深圳518031

出　　处：《西安建筑科技大学学报（自然科学版）》2015年第4期469-476,共8页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

基　　金：国家自然科学基金项目(51278395);陕西省教育厅专项基金(12JK0895);西安市科技攻关课题(GG04051)

摘　　要：采用Matlab/Simulink分析了纯摩擦滑移隔震体系在地震作用下的动力响应,建立了滑移隔震结构的多自由度计算模型,并分别对比了滑移隔震体系的等代单自由度刚体模型、双自由度模型与多自由度模型的滑移位移谱、滑移量时程分析曲线.计算结果表明,双自由度模型与多自由度模型的动力响应比较接近;隔震层的最大滑移量只与摩擦系数和输入的地震波有关,而与结构的整体质量无关;当隔震层的摩擦系数小于0.1时,单自由度刚体模型的和多自由度体系的滑移位移谱拟合较好,从而验证了等代刚体结构确定的滑移位移谱模拟实际滑移隔震结构的合理性和可行性,为滑移隔震体系的推广建立了基础.The dynamic response of pure friction-sliding isolation system under seismic action is analyzed through the Matlab/Simulink,and the MDOF calculation model of sliding isolation structure is set up.The sliding displacement spectrum and sliding displacement with time history analysis of curve to the SDOF equivalent rigid model,the DDOF equivalent model and the MDOF equivalent model of the sliding isolation system are contrasted respectively.The results show that the dynamic response of the DDOF equivalent is close to the response of the MDOF equivalent model;the maximum amount of sliding isolation layer is only related with coefficient of the friction and seismic wave put in and nothing is related with the overall mass of the structure.When coefficient of friction of the isolation layer is less than 0.1,the SDOF equivalent rigid model is fitted with the DDOF equivalent model.Accordingly,the rationality and feasibility of using sliding displacement spectrum which is determined by the equivalent rigid model to simulate actual sliding structure is confirmed,and a foundation for the spread of sliding isolation system is established.

关 键 词：滑移隔震结构 动力响应 反应谱 

分 类 号：TU398.2[建筑科学—结构工程]