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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。
The energy balance equation of the isolated structure under the maximum seismic response under the earthquake action is established. The elastic vibration energy and the plastic expression of the isolated and non-isolated seismic isolation structures are given, and the isolation structure based on energy balance Earthquake response prediction. Based on the top isolation, interlayer isolation and base isolation structure, the accuracy of prediction of earthquake response is verified by numerical solution of time-history analysis method. The seismic performance of three kinds of isolation structures is compared. The results show that for different input seismic waves, the energy response of earthquake prediction curve envelops the results of most time-history analysis, and the energy method can predict the response of seismic isolation structure with more accuracy.