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（1 中國(guó)建筑科學(xué)研究院, 北京 100013； 2 北京市朝陽(yáng)區(qū)住房和城鄉(xiāng)建設(shè)委員會(huì), 北京 100020）

［摘要］砌體結(jié)構(gòu)住宅底層窗下墻拆除后，墻肢抗側(cè)剛度及承載力降低，所分配的地震作用將向其他墻肢轉(zhuǎn)移，容易形成抗震薄弱構(gòu)件。為了解窗下墻拆除后地震作用在墻肢間的重分配規(guī)律及對(duì)墻肢抗震能力的影響，基于試驗(yàn)數(shù)據(jù)初步得出窗下墻拆除后墻肢承載力的修正系數(shù)；針對(duì)設(shè)防烈度8度地區(qū)的六層砌體結(jié)構(gòu)模型，分析不同窗下墻拆除工況下地震作用在同一軸線砌體墻的重分配規(guī)律，并對(duì)現(xiàn)有承載力驗(yàn)算方法及修正承載力驗(yàn)算方法下的墻肢抗震能力進(jìn)行對(duì)比；討論了不同窗下墻拆除情況對(duì)砌體結(jié)構(gòu)抗震能力的影響。分析結(jié)果表明，拆除窗下墻后，對(duì)墻肢進(jìn)行承載力修正，原有滿足抗震要求的砌體墻可能不再滿足抗震要求，原有不滿足要求的墻肢其抗震能力可能嚴(yán)重不滿足要求

［關(guān)鍵詞］砌體結(jié)構(gòu)； 窗下墻； 抗震能力指數(shù)； 承載力修正

中圖分類號(hào)：TU362    文獻(xiàn)標(biāo)識(shí)碼：A    文章編號(hào)：1002-848X(2015)04-0090-04

Seismic capacity analysis of masonry structure with removal of spandrel wall

based on bearing capacity modification

Guo Meng1, Zhang Ying2, Xu Fuquan1, Zhu Ying1, Zhang Ting2, Zhang Qiang

（1 China Academy of Building Research， Beijing 100013, China；2 Beijing Chaoyang Commission of Housing and Urban\|Rural Development， Beijing 100020, China）

Abstract:

The removal of spandrel wall for masonry structure decreases the lateral stiffness and bearing capacity of the wall and the allocated earthquake action would be  transfered to other walls to form weak components easily. In order to study the redistribution law of earthquake action among  walls with removal of spandrel wall and the influence of the removal of spantrel wall on  the seismic capacity of the wall, the correction coefficient of bearing capacity of  wall with the removal of spandrel wall was obtained based on the experimental data preliminarily. The six\|layer masonry structure model in eight degree seismic precautionary zone was constructed to analyze redistribution law of earthquake action among masonry walls on the same axis under different removal working cases of spandrel wall. The bearing capacities of the wall obtained by  using the methods of current bearing capacity checking method and revised bearing capacity checking method were compared.  Influences of different removal working cases of spandrel wall on seismic capacity of masonry structure were discussed. Analysis results show that after removing the spandrel wall, the  wall which originally satisfies the seismic requirements may no longer satisfy the seismic requirements, and the  wall which originally can not satisfy the seismic requirements may not satisfy the seismic requirements seriously after the revision of wall bearing capacity.

Keywords:masonry structure; spandrel wall; seismic capacity index; bearing capacity modification

*國(guó)家自然科學(xué)基金(51308522)。

作者簡(jiǎn)介：郭猛，博士，副研究員，一級(jí)注冊(cè)結(jié)構(gòu)工程師，一級(jí)注冊(cè)建造師，Email:guomeng673@163.com。

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