空间网格结构多维地震反应分析方法研究现状

空间网格结构应用广泛,但其动力特性复杂,在地震作用下多维耦合效应显著。在总结现有研究成果的基础上,阐明了目前关于多维地震动输入和结构抗震性能参数研究的不足和存在的问题;在性能化抗震设计和多维地震反应分析的视角下,分析了振型分解反应谱方法、时程分析方法、增量动力分析方法、推覆分析方法以及随机方法的研究现状,指出了不同方法在多维化和实用化过程中面临的关键问题;介绍了空间网格结构抗震性能水准划分方法和相关指标,指出了现有指标的局限性,提供了可行的研究思路。最后,论述了发展多维推覆分析方法的必要性。

State of the Art Review on Multi-dimensional Seismic Analysis Techniques for Spatial Reticulated Structures

The engineering application of spatial reticulated structure is increasingly extensive.However,the dynamic property of this type of structure is complicated and multi-dimensional coupling effect is significant under earthquake.Based on current results,the underlying problems in research of multi-dimensional ground motion input and seismic performance parameters are presented.In the perspective of performance-based seismic design and multi-dimensional seismic analysis,the research status and key issues of various techniques,including the spectrum method,response history analysis method,incremental dynamic analysis method,pushover analysis method,as well as random analysis method,are reviewed and compared.Division methods and parameters of seismic performance level for spatial reticulated structures are introduced,with the existing limitation and feasible paths addressed.Finally,the necessity of multidimensional pushover analysis method is pointed out in conclusion part.