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.
出处
《兰州理工大学学报》
CAS
北大核心
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)
关键词
砖混结构
墙体
温度应力
brick-masonry mixed structure
walling body
thermal stress
