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混凝土结构的裂缝几乎是不可避免的,它的产生原因往往是由于约束力比由于荷载的为多。若裂缝宽度得到限制,则其对结构的使用性能,结构的耐久性及安全性就将是无害的了。为了推导裂缝的公式,对开裂的内部进程作了分析。为了计算限制裂缝所需钢筋的实用设计图表在一些实例中作了说明。对于无筋的大体积混凝土的裂缝宽度的限制也作了阐述。
Cracks in concrete structures are almost unavoidable, and the reason for this is often due to the binding force being more than the load. If the crack width is limited, it will be harmless to the structural performance, durability and safety of the structure. In order to derive the formula of the fracture, the internal process of cracking was analyzed. A practical design chart for calculating the reinforcement required to limit cracking is illustrated in some examples. The limit of crack width of non-reinforced mass concrete is also described.