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体外预应力是一种有效的桥梁加固方法 ,简单易行 ,不影响行车 ,受力途径明确 ,能显著提高结构承载力和抗裂度 ,有效改善结构的应力状态[1] 。1 体外索加固桥梁的构造和设计理论采用体外索加固桥梁时 ,为了满足承载力的需要 ,一般采用折线形 ,在梁的跨中部分体外索布置在腹板下
External prestressing is an effective method of bridge reinforcement. It is simple and easy to operate, does not affect traffic and has a clear way of stress. It can significantly improve the bearing capacity and crack resistance of structures and effectively improve the stress state of structures [1]. 1 extra-corporeal cable reinforcement bridge structure and design theory When using extra-corporeal cable to reinforce the bridge, in order to meet the needs of the bearing capacity, the general use of line-shaped, cross-section of the beam in the extrasolar cable arranged under the web