某砌体结构工程的裂缝分析

Crack Analysis for a Masonry Structural Engineering

屋面采用钢屋架的1号库房,由于钢屋架与砖砌墙体的线膨胀系数的差异,升温情况下屋架连接处砌体扶壁柱柱头碎裂,降温情况下上、下柱交接处产生倒八字斜裂缝;屋面采用木屋架的2号库房,结构纵向较长,墙体无任何窗洞,且只有一层,由于受砌体干缩和温差收缩作用,纵墙面产生大量的竖向裂缝。文中详细分析以上砌体结构裂缝产生的原因,并对2号库房墙体在温度作用下的情况进行有限元模拟,提出了灌环氧水泥砂浆修补裂缝的处理措施,取得了较好的效果。

Due to difference of linear expansion coefficient between steel and brick cracking on the top of the column in temperature rise period had been found in masonry No. 1 storage with steel roof truss. Slant split at the column variable cross - section during temperature drop period had been found too. The No. 2 storage with the wooden roof truss is a single -layer house, and has large longitudinal length without any windows. It is more easily effected by dry shrinkage and temperature difference shrinkage of the wall. Vertical cracks had been found in the wall. In this paper, the cause of those cracks is analyzed carefully, and the finite element model has been built to support the theory. Reasonable way to use the poured joint epoxy filler to repair the cracks is proposed. The satisfactory result has been achieved.