长持时地震动对建筑结构抗震影响的研究进展

RESEARCH PROGRESS OF LONG-DURATION GROUND MOTION EFFECTS ON STRUCTURES

该文综述了长持时地震动作用下建筑结构抗震性能的研究进展。介绍了长持时地震动的定义和特性;梳理了长持时地震动作用下建筑结构数值模拟、试验研究和理论分析的研究进展;详细综述了长持时地震动作用下建筑结构的延性性能、耗能能力、易损性和抗倒塌性能的研究进展。此外,介绍了考虑长持时地震作用影响的建筑结构抗震设计方法,梳理了国内外建筑结构抗震设计规范对长持时地震作用的考虑方法,并对长持时地震动作用下建筑结构抗震性能的研究进行了展望。建议关注长持时地震动作用下建筑结构的抗震性能,进一步研究长持时地震动的定义和特性,改进长持时地震动作用下建筑结构的数值模拟、理论分析和试验研究方法,深入探讨长持时地震动作用下各类建筑结构的地震响应、易损性和抗倒塌性能,为未来结构抗震设计及评估中考虑长持时地震作用的影响和规范修订提供参考。

Research progresses of seismic performance of structures subjected to long-duration ground-motions were reviewed.Definitions and characteristics of long-duration ground-motions were expounded.Research progresses of numerical simulation,experimental research and theoretical analysis of structures subjected to long-duration ground-motions were introduced,and research progresses of ductility,energy dissipation capacity,seismic fragility,and collapse resistance capacity of structures subjected to long-duration ground-motions were reviewed.On this basis,research progresses of seismic design methods of structures subjected to long-duration ground-motions were summarized,and the methods in structural seismic design codes considering the long-duration ground-motion effects were summarized.In addition,research on the seismic performance of structures subjected to long-duration ground-motions was prospected.It is recommended that seismic responses of structures subjected to long-duration ground-motions should be paid more attention.It is suggested to perform further study on the definitions and characteristics of long-duration ground-motions.To study the seismic responses,seismic fragility,and collapse resistance capacity of structures subjected to long-duration ground-motions,the numerical simulation,theoretical analysis,and experimental research methods of structures are suggested to be improved.This paper provides references for seismic design and assessment of structures considering the long-duration ground-motion effects.