地震动脉冲分量表征模型研究综述

Review on pulse-component models of earthquake ground motions

通过回顾地震工程研究领域的文献,对研究中采用的地震动脉冲分量表征模型进行了收集与整理。针对各类模型的特点进行了比较与讨论,并对其研究意义以及在结构抗震研究中所发挥的作用进行梳理总结,提炼出了研究框架。根据现有的研究结果指出:考虑地震动脉冲效应的地震危险性分析是研究框架中的核心环节;对于反映相同脉冲特征的不同脉冲表征模型,尽管它们采用的数学表达形式存在差异,但是在动力学上的表现是接近的;具有滑冲效应特征的脉冲表征模型和具有前方向性效应特征的脉冲表征模型之间存在相似性。最后,对结构地震反应计算分析中地震动选取的相关考虑因素进行了讨论。

By reviewing literature in the field of earthquake engineering,the pulse-component models of earthquake ground motions are collected and organized.The characteristics of various pulse models are compared and discussed.The research significance of these pulse-component models is concluded and organized to form a systematic research framework.According to the existing research results,it is pointed out that the seismic hazard analysis considering the pulse effects in earthquake ground motions is the core in the research framework.Although the pulse models use different mathematical expressions to describe the same pulse characteristics,their performance is similar in structural dynamics.There are similarities between the pulse models with the forward directivity effect and those with the fling-step effect.At last,the details on considering the pulse effects in ground-motion selections for seismic design of structures are discussed.