基础隔震结构基于能量法的反应预测

Response Analysis for Base-isolated Structure Based on Energy Theory

以承载力或位移为设计准则的现行抗震设计方法,无法反映地震动持时的影响,本文引入β谱计算地震输入能量,以能量平衡原理为基础,将能量设计准则与现行抗震设计标准相结合,建立基础隔震结构的能量简化设计方法,对结构的力和位移反应进行预测。最后,分别采用能量法和时程分析法进行工程实例验算,结果表明:该方法具有一定可靠性,可以为工程抗震设计提供借鉴。

With strength or displacement as design criteria, it is impossible to reflect the effect of duration for most of current seismic design methods. In this paper, β spectra is established to calculate seismic energy. Combined with current seismic design criteria, simplified design methods based on energy theory for isolation structures are founded and used to predict force and displacement responses of structures. Finally, a practical example is introduced, and the method is proved to be reliable. So, energy method can be referred in seismic design.