（1 北京工业大学建筑工程学院， 北京 100124； 2 北京市建筑设计研究院有限公司， 北京 100045）

［摘要］以ABAQUS作为计算平台，对在地震作用下未加固和加固后的老旧砌体结构进行了倒塌数值仿真。以北京市某典型老旧砖砌体住宅为例，选取了7组地震波，采用时程分析方法对结构地震倒塌机理和过程进行了模拟。首先分析了未加固的结构在7个工况下的地震反应，结果表明，未加固结构在中震作用下有6个工况出现倒塌，需要进行抗震加固。考虑了圈梁构造柱和外套结构加固两种加固方法，对加固后的砌体结构进行了倒塌分析，结果表明，单纯的圈梁构造柱加固可以提高结构的延性，但部分中震工况下仍然出现了倒塌或局部倒塌，大震工况下结构全部倒塌。即使在考虑后续使用年限50年的情况下，采用外套结构加固的砌体结构仍然能够满足“大震不倒”的设防目标。

［关键词］砌体结构； 倒塌； 地震作用； 数值模拟

中图分类号：TU362, TU398+.5文献标识码：A文章编号：1002-848X(2016)17-0088-05

Application of progressive-collapse numerical simulation of masonry structures under earthquake action

Ge Dongdong1,2, Chen Xi2, Li Wenfeng2, Miao Qisong2

(1 College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China;2 Beijing Institute of Architectural Design, Beijing 100045, China)

Abstract:Progressive-collapse simulations of un-strengthened and strengthened old masonry structures subjected to earthquake action were performed on the basis of ABAQUS as calculating platform. A typical old brick masonry house in Beijing was taken as an example. Seven groups of earthquake waves were selected to simulate collapse mechanism and process of the structure by means of time-history analysis method. At first, seismic responses of the un-strengthened structure under seven different working conditions were analyzed. The analysis results show that un-strengthened structure collapses in six working conditions under fortification earthquake, so it needs to be strengthened. Two types of strengthening methods were considered including ring beams and constructional columns method and external coat structure strengthening method. Progressive-collapse analysis of the strengthened structure was carried out. The results demonstrate that ductility of structure is increased by ring beams and constructional columns, but the structure partially collapses or thoroughly collapses under some working conditions under fortification earthquake, and the structure thoroughly collapses under rare earthquake. Structure strengthened by external coat structure can achieve the seismic fortification objective of “not collapse under rare earthquake” even if subsequent service life of structure is considered as fifty years.

Keywords:masonry structure; progressive-collapse; earthquake action; numerical simulation

 作者简介：閤东东，博士，高级工程师，一级注册结构工程师，Email：gddhust@163.com。