地震动持时在工程抗震设计中的研究现状与展望

Research Status and Prospect of Earthquake Duration in Engineering Anti-seismic Design

长持时地震动对工程场地震害和建筑结构累积损伤具有不利影响,在工程结构抗震设计中选取地震波时,应充分考虑地震动持时的影响。通过文献梳理,对几类典型的地震动持时定义进行阐述,分析其特点与适用性,并总结持时影响因素及预测方程的研究进展。基于持时对结构抗震性能的影响,总结考虑持时的抗震设计方法研究现状,分析存在的问题,并对研究方向进行展望。

Based on the adverse effect of long-duration earthquake on the earthquake disaster of the engineering construction site and the cumulative damage of the structures,the impact of the duration of ground motions should be fully considered to select seismic waves for seismic design of the structures.This article mainly elaborates several typical definitions of the duration of ground motions,analyzs and discusses its characteristics and scope of application,it is introduced that the influencing factors and the research progress of prediction equations of ground motion duration as well.At the same time,according to the effect of duration on the seismic performance of structures,the current research status and existing problems of seismic design methods considering duration has been summarized and analyzed.At last,the research direction of the application of duration in seismic design is prospected.