竖向荷载差引起砌体顶部开裂有限元分析  

FINITE ELEMENT ANALYSIS OF ROOF CRACKS IN MASONRY BUILDING WITH THE INFLUENCE OF DIFFERENT VERTICAL COMPRESSION

作　　者：陈大川[1] 唐利飞[1] 张成强[1] 

机构地区：[1]湖南大学土木工程学院,长沙410082

出　　处：《工业建筑》2010年第10期61-64,共4页Industrial Construction

基　　金：国家自然科学基金项目(50778067)

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。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.

关 键 词：竖向荷载差 砌体 裂缝 有限元分析 

分 类 号：TU746.3[建筑科学—建筑技术科学]