Evaluation Methods Of The Detection And Bearing Capacity For20m Span Simply Supported Reinforced Concrete T Beam Bridge

The bridge is an important part of the transportation, its working condition will directly affect the fluency and the security of the road traffic.The bridge is under the dual effects of natural environment and traffic load in the long-term and it shows in the structural damage and the aging and failure of bridge components,so that the bearing capacity of bridge is declining and it is difficult to ensure the safety and reliability of transportation.Therefore, how to make an accurate and comprehensive evaluation of the residual bearing capacity of the bridge can optimize the strategy of bridge repair and reinforcement and establish a secure access.This paper takes a simply supported T beam of Jilin Province as the project background to this problem, the paper carried out the following work:A) Firstly, we carried on the evaluation to the technical condition of the simply supported T beam superstructure and made a preliminary assessment of the bridge as the data base for subsequent calculation on the basis of the existing norms;B) We established a two-level evaluation index system based on the bridge dynamic characteristics and static characteristics and determined the weights of index at all levels by the uncertain type of AHP, and the application of the evaluation system of a simply supported T beam bearing capacity of qualitative evaluation, finally, according to the relevant norms combined with the detection results of the ultimate bearing capacity of the quantitative description;C) According to the bearing capacity of the bridge limit,we made the inversion calculation of the bridge traffic capacity to determine whether it can satisfy the current traffic demand and make the corresponding traffic plan and repair reinforcement scheme.