EPS外墙外保温系统的温度场与温度应力研究  

Study on the temperature field and temperature stress of the EPS external thermal insulation system

作　　者：顾斌[1] 薛涛[2] 谢甫哲[1] GU Bin;XUE Tao;XIE Fuzhe(Faculty of Civil Engineering and Mechanics,Jiangsu University,Zhenjiang 212013,China;School of Architecture Engineering,Jinling Institute of Technology,Nanjing 211169,China)

机构地区：[1]江苏大学土木工程与力学学院,江苏镇江212013 [2]金陵科技学院建筑工程学院,江苏南京211169

出　　处：《四川建筑科学研究》2018年第1期102-107,共6页Sichuan Building Science

基　　金：国家自然科学基金(51641804);江苏省自然科学基金(BK20160536);江苏大学高级人才科研启动基金(15JDG170)

摘　　要：基于有限单元法,建立了考虑太阳辐射和大气温度变化的EPS外墙外保温系统的温度效应有限元模型。以东北大庆地区某住宅建筑为例,对带有窗洞外墙外保温墙体的温度效应进行了研究。结果表明:保温墙面层和基层墙体内温度沿墙厚均基本呈均匀分布,保温层内部温度基本呈线性分布,且变化幅度约等于墙体的内外表面温差;夏季和冬季墙体内外表面温差分别可达-30.5℃和48.8℃;温度作用下,窗洞四角部位的面层极易发生斜向裂缝,上下部位的面层易发生竖向裂缝,左右部位的面层易发生水平向裂缝;为避免保温墙面层收缩引起裂缝,应尽量避免在夏季进行保温墙面层施工。Based on the finite element method,a temperature effect finite element model of external thermal insulation system considering solar radiation and air temperature was built.Taking a residential building in Daqing city for example,temperature effect of the external thermal insulation system was studied.The results show that the temperatures in the structure layer and surface layer are nearly distributed uniformly in the direction of wall thickness,while the temperature in the insulation layer is nearly distributed linear,and the temperature difference is nearly equal to the temperature difference between the outer surface and the inner surface.The temperature difference between inner and outer surface of wall can be reached-30.5and48.8respectively in the summer and winter.Under the effect of the temperature,outer surface in the corners of the window are easily occurred oblique cracks,the areas of outer surface above and below the window are easily occurred vertical cracks,the areas of outer surface on the left and right of the window are easily occurred horizontal cracks.The cracks in the outer surface of the wall are mainly occurred in winter,and mainly generated by shrinkage with temperature decreasing,therefore,it should try to avoid constructing the outer surface of the external thermal insulation system in summer.

关 键 词：外墙外保温系统 温度场 温度应力 太阳辐射 大气温度 

分 类 号：TU111[建筑科学—建筑理论]