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砖混结构房屋特别是住宅楼,顶层端由于端部的正应力较小,其主拉应力接近于元的内外纵墙门窗洞上口,与外纵墙交接的剪应力,则可能引起斜裂缝,在窗口,门口横墙端部的上端出现斜裂缝,有的内外墙之处由于应力集中,易产生裂缝,由于屋盖对楼板交接处还出现水平裂缝。对砖混结构顶层墙体、楼板裂缝的特点及产生原因作了简要分析,并结合工程实例提出了设计、施工中防治温度裂缝的方法。
Brick-concrete houses, especially residential buildings, the top end of the end due to the smaller positive stress, the main tensile stress close to the yuan’s internal and external vertical wall window openings, and the external wall of the transfer of shear stress, it may cause oblique cracks , In the window, the door at the top of the transverse wall at the top of the diagonal cracks, and some inside and outside the wall due to stress concentration, easy to produce cracks, due to the roof of the floor junction also appears horizontal cracks. Based on the brief analysis of the characteristics and causes of cracks in the top wall and floor of the masonry - concrete structure, the method of preventing and controlling temperature cracks in the design and construction is put forward based on the engineering examples.