1 温差裂缝的分析 温差裂缝形式有正八字缝、倒八字缝、水平缝、斜裂缝等。 目前,由于屋面材料钢筋混凝土和墙体材料砖砌体线胀系数相差1倍,而屋面受到的太阳辐射时间长,接受的辐射热平均要比墙面大1倍左右。特别在夏季势胀明显,若屋面保温隔热层处理不当,屋盖会产生较大的温度膨胀变形(冬季会产生冷缩变形),使屋盖和墙体之间产生较大的拉剪应力, 1 Analysis of temperature cracks Temperature cracks in the form of positive eight-character seams, inverted eight-character seams, horizontal seams, oblique cracks and so on. At present, due to the difference in linear expansion coefficient between the reinforced concrete and wall material of the masonry of roofing materials, and the long solar irradiation time on the roof, the average radiant heat received is about 1 times larger than that of the wall. Especially in the summer, the swelling is obvious. If the roof insulation layer is not handled properly, the roof will have a large temperature expansion deformation (cold shrinkage deformation occurs in winter), resulting in a large tensile shear stress between the roof and the wall. ,