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FINITE ELEMENT ANALYSIS OF ROOF CRACKS IN MASONRY BUILDING WITH THE INFLUENCE OF DIFFERENT VERTICAL COMPRESSION
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摘要: 墙体顶部斜裂缝问题一直是困扰设计和施工人员的重要课题，以往的研究往往将这种斜裂缝的形成归结于温度变化、地基不均匀沉降等因素。从竖向荷载差的角度，采用有限元方法，对竖向荷载差作用下砌体墙体模型进行模拟分析，得到的裂缝位置、形态特征与理论分析以及试验结果吻合较好，证实了竖向荷载差理论是正确的，为研究此类问题提供了一种合理有效的方法。同时，对带构造措施和不带构造措施的砌体进行对比模拟，探讨防止竖向荷载差裂缝的有效方法。Abstract: Inclined cracks on the top of masonry walls are always the important issue troubling designers and constructors.Previous studies hold that the cause of the cracks is temperature variation and differential settlement of foundation and so on.From the angle of different vertical compression,this paper presents a numerical analysis of masonry wall bearing different vertical load by finite element method.The fracture distribution and morphological characteristics of cracks have good agreement with theoretical analysis and test results.The simulated results show that the theory of different vertical compression is correct and the feasibility of FEM method is validated.Masonry with construction measures has been compared with that without construction measures in order to investigate effective method to this type of cracks.
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Key words:
- different vertical compression /
- masonry /
- crack /
- finite element analysis
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[2] 陈大川,尚守平.竖向荷载差作用下多层砌体房屋顶层裂缝的理论和试验研究[J].建筑结构学报,2006,27(4):116-120. 苑振芳,刘斌.关于砌体结构裂缝控制措施的建议[J].建筑结构,2000,30(8):11-14,27. [3] 王铁梦.工程结构裂缝控制[M].北京:中国建筑工业出版社,1997:103-104. [4] 朱伯龙.砌体结构设计原理[M].上海: 同济大学出版社,1998:16-17. [5] 张云杰.混凝土砌块砌体轴压应力应变关系试验研究[D].哈尔滨:哈尔滨工业大学,2002. [6] 金伟良,潘金龙,徐铨彪,等.不同构造措施的混凝土小型空心砌块单片墙的力学性能分析[J].建筑结构,2003,33 (7):70 －72,69. -
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