【摘要】 建立地震作用下隔震结构在最大地震响应时刻的能量平衡方程,给出隔震结构隔震层和非隔震层的弹性振动能、塑性能的表达式,推导出基于能量平衡的隔震结构地震响应预测式。以顶部隔震、层间隔震、基础隔震结构为仿真对象,利用时程分析法的数值解验证了地震响应预测式的准确性,比较研究了三种隔震结构的抗震性能。结果表明:对于不同的输入地震波,能量法的地震响应预测曲线包络了多数时程分析的结果,能量法能够较准确地预测隔震结构在地震作用下的响应值。更多还原

【Abstract】 The energy balance equation of an isolated structure is established at the moment of maximum earthquake responses.Expressions of elastic vibration energy and plastic energy for isolated layers and non-isolated layers are presented.Then,based on the energy principle,formulas for predicting earthquake responses are derived.Three numerical models,including a top-isolated structure,a storey-isolated structure and a base-isolated structure,are used to validate the accuracy of the predicted responses.Finally,the aseismic properties of the three isolated structures are discussed.Results show that response prediction curves can match well and envelope most of the time history responses for a class of earthquake records.Energy method can be used to predict earthquake responses of isolated structures.更多还原