砖混结构墙体温度应力的有限元分析  

Finite element analysis of thermal stress within walls of brick-masonry mixed structure

作　　者：朱彦鹏[1] 张鸿[1] 严树海 

机构地区：[1]兰州理工大学土木工程学院,甘肃兰州730050 [2]中国电信集团河北省分公司,河北石家庄050000

出　　处：《兰州理工大学学报》2007年第6期103-106,共4页Journal of Lanzhou University of Technology

基　　金：甘肃省自然科学基金(ZS032-B25-021)

摘　　要：砖混结构中的现浇楼板、墙体由于温度变化和混凝土收缩产生温度应力,可能会导致结构出现裂缝,严重时甚至影响结构的安全使用.结合裂缝的成因以及计算方法,采用ANSYS有限元分析软件建立数值计算模型,对结构墙体进行温度应力的有限元分析.分析表明:伸缩缝间距不仅取决于于屋盖或楼盖的类别和有无保温层,而与砌体的种类、材料和收缩性能以及结构物的平面尺寸等有直接关系.The stress produced by temperature change and concrete shrinkage within cast-in-place slabs and walls of brick-masonry mixed structure would result in cracks and affect even the structure＇s safety in severe cases. Taking both the formation mechanism and proper calculation methods of temperature-induced cracks into consideration and using a numeric calculation model developed with finite element analysis software ANSYS, the thermal stress of the whole walls was analyzed. It could be concluded that the distance between contraction gaps would not only depend on the type of roots as well as the existence of heat insulation layer in them but also have direct relation with the kind of masonry envelopes, materials, their shrinking capability as well as the plane dimensions of the structure.

关 键 词：砖混结构 墙体 温度应力 

分 类 号：TU311.41[建筑科学—结构工程] TU398.5