公共建筑结构的抗地震倒塌能力优化评估分析

Optimized Evaluation Analysis of Seismic Collapse Capacity of Public Buildings

以往基于模态增量动力方法对公共建筑进行抗地震倒塌能力评估时是单纯地从总体角度进行考察的,其得到的结果较为粗糙,无法准确反映出公共建筑的抗地震倒塌能力,导致其经济效益较差。提出新的公共建筑结构抗地震倒塌能力优化评估方法以分析公共建筑整体的抗地震倒塌能力,总结出其与子结构以及构件三者间的关系,进而研究构件的损毁情况,以实现对建筑抗地震倒塌能力的整体评估。基于公共建筑的倒塌破坏区间,采用其结构抗震倒塌能力评估方法,对公共建筑结构的抗地震倒塌能力实施优化评估分析,得到其具体破坏指数,实现对其进行准确评估。实验结果说明,所提方法可准确描述公共建筑结构的抗地震倒塌能力,提高建筑结构抗地震倒塌能力和经济效益。

In the past,using the modal incremental dynamic method to evaluate the seismic col-lapse capacity of public buildings did not accurately reflect the earthquake collapse resistance of public buildings^thus gaining poor economic benefits.In this study,a new and optimized evalua-tion method of determining the seismic collapse capacity of public buildings is proposed and used to analyze the overall performances of public buildings.Then,the relationship among the overall structure of public buildings?substructures?and components is summarized.The overall evalua-tion on the public building is fulfilled by evaluating the damage situation of components.Based on the seismic damage interval of public buildings?the optimized evaluation on seismic collapse ca-pacity of public buildings are finished with the proposed methods and the damage indices of the seismic collapse capacity of public buildings are obtained.The experimental results indicate that he proposed method could exactly describe the seismic collapse capacity of public buildings,thus improving the economic benefits.