隔震结构的迭代反应谱法研究和软件实现

Research and software development on the iterative modal response spectrum method of theisolated structures

采用振型分解反应谱法计算隔震结构时,如何比较准确的估计隔震层的等效阻尼和等效刚度是一个关键问题。基于实振型分解反应谱法建立了一套迭代计算确定隔震层等效刚度和等效阻尼的算法,并在多高层建筑结构设计软件SATWE中实现,计算表明该算法和程序能够比较快速地对隔震结构进行等效线性化。使用本文算法及程序,可以使隔震结构的计算更加接近于传统抗震结构的计算。

Using the modal response spectrum method to analysis an isolated structure,a key point is how to decide the equivalents damping ratio and equivalent stiffness of the isolation layer according to the seismic force.An iterative algorithm was proposed to solve this problem,which is based on the real modal analysis.This algorithm has been implemented in SATWE,which is a popular analysis and design software for building structures.The examples indicate that this algorithm and SATWE can equivalently linearize the isolated structures quickly,and then estimate the seismic response accurately.Using this algorithm and SATWE,the calculation of isolated structures is similar to the traditional anti-seismic structures.