Diseases Detection And Reinforcement Of Continuous Rigid Frame Bridge

With the popularity of computer and the application of finite element theory, leading to bridge the rapid development of science, and the wide application of high strength materials, construction methods and the mature, make prestressed concrete continuous rigid frame in the1990s get fast development. Continuous rigid frame Bridges in springing up all over the country, with the development of economy, the daily operation of these bridge load continuously improve, that part of the design standard low continuous rigid frame produce all kinds of disease, how they might do to these diseases, make the original structure system restore or strengthen carrying capacity to adapt to the volume of traffic of the growth, is a realistic subject. It also affects prestressed concrete continuous rigid frame the development trend of the future. Today, through the finite element software to simulate the structure should be continuous rigid frame Bridges the reinforcement of the construction, and the analysis of the results, to select rational reinforcement method, reach the reinforcement effect, will produce a great engineering value and economic benefits.This paper first introduced the continuous rigid frame Bridges the mechanical characteristics of long span continuous rigid frame Bridges at home and abroad and the research results of the reinforcement technique, and kinds of the reinforcement method to make introduced, finally by comparing the test data and the model theory to evaluate the effect of strengthening data.Continuous rigid frame construction process simulation calculation, the key is that reasonable simulation reinforcement of the state and the bridge before construction state, based on the construction process and main girder flange stress and the main goal of deflection, the reinforcement of the control section before and after the bridge stress and deflection change analysis to determine the rationality of the model is established, and based on this, the reinforcement bridge state after the link that the reinforcement effect. This paper in reinforcing the construction of the simulation calculation, a bridge reinforcement for background, with Midas/Civil finite element software has established the entire bridge model, and according to the actual situation of the bridge are the bridge damage adjust the finite element model. To bridge reinforcement of the reinforced before and the deflection and stress made computation, after the completion of the overall reinforcement effect of Bridges.This paper not only has certain theoretical meaning, and has practical value for other similar continuous rigid frame useful reference for reinforcement engineering.