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砖混结构在使用荷载、变形荷载作用下和施工过程中常常出现不同程度的各种形式裂缝,这个问题已广泛引起工程界的重视。对裂缝的分析、控制及预防的研究着眼点不同,可分为施工阶段和使用阶段,它们相互联系、相互影响。施工阶段是由建筑材料、施工工艺和外界环境等原因引起;使用阶段是由使用荷载和变形荷载(如:温度、收缩、膨胀、沉降等)引起。 在砖混结构中,墙体开裂的主要原因是由不均匀沉降和温度变化所致,但温度变化引起的建筑物顶层端部以纵墙为主的水平或斜向裂缝占绝大部
The brick-concrete structure often has various degrees of cracks of various degrees under the use of load, deformation load and the construction process, this issue has caused widespread concern in the engineering community. The research on the analysis, control and prevention of cracks has different focus. It can be divided into construction phase and use phase. They are related to each other and influence each other. The construction phase is caused by the construction materials, construction technology and external environment; the use phase is caused by the use of loads and deformation loads (eg temperature, shrinkage, expansion, settlement, etc.). In the brick-concrete structure, the main cause of wall cracking is caused by uneven settlement and temperature changes, but the horizontal or oblique cracks dominated by the vertical wall dominate the top of the building caused by temperature changes.