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（1 北京工業(yè)大學(xué)建筑工程學(xué)院， 北京 100124； 2 北京市建筑設(shè)計(jì)研究院有限公司， 北京 100045）

［摘要］以ABAQUS作為計(jì)算平臺(tái)，對(duì)在地震作用下未加固和加固后的老舊砌體結(jié)構(gòu)進(jìn)行了倒塌數(shù)值仿真。以北京市某典型老舊磚砌體住宅為例，選取了7組地震波，采用時(shí)程分析方法對(duì)結(jié)構(gòu)地震倒塌機(jī)理和過程進(jìn)行了模擬。首先分析了未加固的結(jié)構(gòu)在7個(gè)工況下的地震反應(yīng)，結(jié)果表明，未加固結(jié)構(gòu)在中震作用下有6個(gè)工況出現(xiàn)倒塌，需要進(jìn)行抗震加固?？紤]了圈梁構(gòu)造柱和外套結(jié)構(gòu)加固兩種加固方法，對(duì)加固后的砌體結(jié)構(gòu)進(jìn)行了倒塌分析，結(jié)果表明，單純的圈梁構(gòu)造柱加固可以提高結(jié)構(gòu)的延性，但部分中震工況下仍然出現(xiàn)了倒塌或局部倒塌，大震工況下結(jié)構(gòu)全部倒塌。即使在考慮后續(xù)使用年限50年的情況下，采用外套結(jié)構(gòu)加固的砌體結(jié)構(gòu)仍然能夠滿足“大震不倒”的設(shè)防目標(biāo)。

［關(guān)鍵詞］砌體結(jié)構(gòu)； 倒塌； 地震作用； 數(shù)值模擬

中圖分類號(hào)：TU362, TU398+.5文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：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

 作者簡介：閤東東，博士，高級(jí)工程師，一級(jí)注冊(cè)結(jié)構(gòu)工程師，Email：gddhust@163.com。