基础隔震结构在地震作用下动力响应小波分析

在多自由度基础隔震动力学响应计算模型的基础上 ,采用小波变换将地震输入能量在各个频段进行分解 ,对隔震系统在各个频段的地震作用下的动力反应进行了动力学分析。并采用文中的方法对一实际工程进行了分析 ,结果表明 :基础隔震体系可以有效地降低上部结构的地震反应 ;低频分量的地震作用对结构的作用较大 ,而高频分量的作用衰减较快 ,可以不予考虑。

DYNAMIC RESPONSE ANALYSIS OF ISOLATED SEISMIC FOUNDATION STRUCTURE UNDER EARTHQUAKE MOTION USING WAVELET TRANSFORMATION

Based on the multiple freedom degree base isolation dynamics computation model, the wavelet transform technique is applied to the decomposition of earthquake motion input energy into different frequency bands and the dynamics analysis is performed on the base isolation structure within different frequency band earthquake motion input energy and the response energy distribution under different frequency band input energy is recognized. With the method aforementioned, an analysis is performed on a practical engineering base isolation structure and the analysis result shows that the base isolation can effectively reduce the response of upper structure under earthquake motion and the lower frequency band of energy input has recognized effect on the structure response and the energy distribution, while the higher frequency band energy input has little influence on the structure,which decreases soon.