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对工程实践中钢筋混凝土梁腹部出现的有规律的梭形裂缝，从荷载作用、温度变化、混凝土 收缩等方面讨论了梁腹出现梭形裂缝的机理，提出了设计施工中应改进和注意的问题。
In this paper, the regular fission fissures appearing in the abdomen of reinforced concrete beam in engineering practice are discussed, and the mechanism of fissure fractures in the web and abdomen is discussed from the aspects of load, temperature and concrete shrinkage. The problems that should be improved and paid attention to in design and construction .