四川农居房屋悬挑部分的结构受力分析
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摘要
在四川农居房屋中大量存在着外纵墙位于挑梁端部的砖砌体结构房屋。经过对大量该类房屋的现场检查和检测,发现挑梁上部墙体出现斜向裂缝的现象较为普遍。通过采用有限元计算,对该类房屋悬挑部位的受力情况按照实际施工工序进行模拟和分析,以找出裂缝产生的原因以及实际结构模型与设计假定的关系。同时,针对该类房屋挑出一侧的楼层外纵墙与相应部位的底层外纵墙竖向不连续的问题,对房屋在地震作用下的受力性能进行了分析并提出了处理建议。
In Sichuan province there extensively exist farmhouses with overhanging upper story exterior wall which is designed to be supported by cantilever beam.In this paper a FEM analysis about the overhanging part for a model based on actual construction procedure is performed,the analysis results are compared with cracking walls found on many case studies for the connection between the actual model and the model by designer.The problem of vertically discontinuous exterior wall's structural behavior subject to earthquake is also dressed and a suggestion is made for design reference.
引文
[1]GB50003-2001,砌体结构设计规范[S].
    [2]GB50010-2002,混凝土结构设计规范[S].
    [3]吴慧娟,曲琦,葛学礼,马东辉.地震高发区农村抗震能力建设与震后重建[J].工程抗震与加固改造,2004,(5):1-5.
    [4]GB50011-2001,建筑抗震设计规范[S].

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