层间隔震结构的能量平衡

从能量观点出发,引入设计用能量谱的概念,分析了地震输入能量在层间隔震结构中的分配和耗散。推导出了基于能量平衡的层间隔震结构的隔震层总剪力、最大变形以及基底剪力的地震响应预测式,分析了隔震层刚度、阻尼以及隔震层的设置位置等参数对层间隔震结构减震性能的影响,并阐明了其自身的减震控制机理。研究表明,基于能量平衡的分析方法是一种预测层间隔震结构地震响应和评价其减震性能的有效手段。

An analysis method of story isolation structures base on energy balance

From the point of view in energy,this paper introduces a concept of energy spectrum used in design.Through analyzing the distributing and dissipation of the earthquake input energy in story isolation structures,three formulae to predict the seismic responses about the total shearing force of isolation layer,the maximum deformation of isolation layer and the base shearing force of the story isolation structure are derived out based on the energy balance equation.The effects of the isolator parameters such as the laminated rubber stiffness,the lead damper strength and isolation layer inserted location to the seismic reduction performance of story isolation structures are discussed,and the seismic control mechanism which is different from base isolation structures of story isolation structures is clarified.The study indicates that the analysis method based on energy balance is an effective approach to predict the seismic responses and to estimate the seismic reduction performance of story isolation system.