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由子温度变化和荷载作用,混凝土结构常常产生表面的宏观裂缝,安全性受到影响。本文建议在裂缝嘴处的结构表面贴板,以对混凝土结构进行补强。另外,本文还用线弹性断裂力学方法对贴板前后的结构受荷载和温度变化的情况,计算了断裂参量J积分值。计算结果表明,在裂缝嘴处的结构表面进行贴板,无论是在荷载作用下或温度变化时,均可大大降低J积分值,因而裂缝扩展的可能性大大减小,是裂缝补强的一种有效方法,适用于水工结构和一般土建结构。
Due to sub-temperature changes and loads, concrete structures often produce macroscopic cracks on the surface and safety is affected. This paper suggests that the structure at the crack mouth surface plate, in order to reinforce the concrete structure. In addition, this paper also uses the method of linear elastic fracture mechanics on the structure before and after affixed to the plate under load and temperature changes, calculated the fracture parameter J integral value. The calculation results show that the crack at the mouth of the structure of the surface of the board, both in the load or temperature changes, can greatly reduce the J integral value, so the possibility of crack expansion is greatly reduced, is a crack reinforcement Effective method, suitable for hydraulic structure and general civil structure.