The Analysis And Evaluation Of Durability For Reinforcement And Broadening Of The Used Bridge

In the ever-increasing volume of traffic and environmental loads, with the bridge becoming older, The gradual accumulation of durability damage affecting the structure of resistance, Reinforcement and reconstruction of the bridge to solve this problem is an effective way to study and become a hot issue in recent years, However,The durability issues of Reinforcement and reconstruction of the bridge were studied less. The use of reliability and fuzzy evaluation methods for durability of reinforcement and reconstruction bridge. It is conducive to highway bridges for the management of scientific management and conservation.First of all, through access to a large number of domestic and foreign literature, This article Analyse the durability of concrete structure factors, summarize the carbonation of concrete and steel corrosion of the calculation model, and analyse the mechanism of various computing model. for durability testing and calculation of parameters of random, The use of reliability methods for reinforcement of the old bridge component and the reinforcement of the durability of wood can be analyzed, by reference to the literature and combined with the actual situation, carried out on the target value of reliability, Respectively the Two types of limit state for carbonation of reinforced concrete and rust expansion cracking used reliability analysis, and predicted the structure of the remaining useful life. Second, for uncertainfy influencing factors of durability.used Fuzzy mathematical methods for durability assessment of components.at the establishment of evaluation weight and membership function, Given combination of the modified structure of the durability of the old and the new evaluation model, And using the ratio of 1 to 9 calibration method, the durability of the component weights of evaluation factors, the recommended value is given.and use the asymmetric approach degree to analyse evaluation grade. Final, Based on the results of these studies, reinforcement and reconstruction of a bridge is carried out after the analysis and evaluation of the durability.