基于PKPM设计程序的高层结构震害预测方法

Earthquake damage prediction method for highrise buildings based on PKPM program

随着城市防震减灾工作的逐步开展,对大中城市高层建筑震害预测的研究需求日益增长。高层结构的震害预测应首先对结构在不同强度地震作用下的反应进行预测,特别是弹塑性反应的分析,而后者一直是结构抗震领域有待解决的关键问题。根据多个城市震害预测的大量工作,总结出了一种基于PKPM建筑结构设计程序的高层震害预测实用方法,即采用Push-Over和弹塑性时程分析两种方法分析结构在不同强度地震作用下的反应形态、破坏情况、薄弱环节等,检验结构是否满足抗震设防要求,提供地震易损性评价,然后综合考量给出该结构的震害预测信息。按该方法对石家庄市多栋高层建筑进行了震害预测研究,为制定石家庄市抗震防灾对策提供了依据。

With the gradual development of urban disaster prevention, the demand for research on seismic damage prediction of highrise building in large and medium cities increases day by day. Earthquake damage prediction of highrise structure should first predict the response of the structure under different intensity earthquake, especially the nonlinear response analysis, and the latter is the key issues to be resolved in the seismic field. Based on the ex- perience of earthquake damage prediction in a number of cities, this paper sums up a practical method by use of PK- PM program. We proposed employing two methods to analyze the response mode, weak link and failure state of the structure in the different intensity of ground motion i.e. push-over and elastoplastic time-history analyses. , chec- king structure＇s seismic resistance capacity, presenting seismic vulnerability assessment and giving out structural seismic damage prediction information In this paper, this method is applied to earthquake damage prediction of highrise structure in Shijiazhuang City and provides a basis for the development of urban seismic disaster prevention countermeasures in Shijiazhuang City.