Study Of The Evaluation For The Concreat Thin-Wall Box Girder Bridge

In our country, the bridges built in the 60's and 70's of 20 centuries, the load standard is lower in the design, and most bridges are still being in used, they can't be satisfied the increase of the traffic, therefore the testing and evaluation and reinforcing of the bridge is very important, rebuilding is not real, but also not scientific. In order to ensure the safety of the large-scale bridge and reduce or avoid the loss of the nation property and the people's life, the testing, evaluation to the safe capability of large-scale bridge having become the hot problem in the bridge engineering.The evaluation of the large-scale bridge is complicated, and the evaluation methods are limited in theory, it is very difficult to ensure the reliability of the result. Therefore, improving the evaluation methods, and researching the synthesization of many evaluation methods to evaluate is urgent. Considering the characteristic and the actuality of the evaluation methods in large-scale bridge, it is feasible to use many kinds of evaluation methods, and the result would be improving.This paper is on based of the testing of the Yongjiang Bridge in nanning, Guangxi province, and builds suitable evaluation model. Builing two evaluation system of code and the Analytic Hierarchy Process (AHP), and useing the evaluation model in the Yongjiang Bridge, comparing the results to the testing, educing the synthesization result of the Yongjiang Bridge in final. AHP is feasible in bridge evaluation, and it be used in other bridges.