双曲拱桥性能的综合评定及加固方法

分析双曲拱桥性能的综合评定方法，以大清流双曲拱桥为工程背景，详细介绍其检测、实桥荷载试验，以及计算分析综合评定的全过程。评定结果表明该桥拱圈上纵向裂缝明显，耐久性差，桥跨结构横向受力不均，但承载能力能满足原荷载等级要求，若要长期使用或提高荷载等级必须进行加固。并对该桥的加固提出建议。

A Study on Performance Evaluation And Strengthening Method of Two-Way Curved Arch Bridges

Analyzing the evaluation method of two-way curved arch bridges, and on the basis of Da Qingliu Two-Way Arch Bridge the whole procedures of the inspection on site, loading test on real bridge, and calculation analyses are introduced. The evaluation results of the arch bridge indicate that serious axial cracks are evident, the durability is poor, and transverse stresses are nonuniform distribution under test load, but the bearing capacity of the bridge can fit the designing live-load level. For long-term service purpose or raising live-load level, the bridge must be strengthened. Last, the strengthening method of the bridge is suggested.