Damage Analysis And Evaluation Of A Reinforced Concrete Arch Bridge

Since the founding of the PRC,China's bridge construction technology continues to develop,reinforced concrete arch bridge is generally built in the city.However,with the increase of transportation time and the increase of traffic volume,many bridges built in the early stage appeared various structural damages.If these problems are not solved,they will seriously threaten human life and property.Therefore,it is necessary to carry out health check on the old bridge regularly.In order to strengthen the maintenance and repair of the old bridge more scientifically and rationally,a set of evaluation system which can reflect the damage condition of the bridge structure is established according to the structural damage condition of the reinforced concrete arch bridge.The main work is as follows:1?Based on the study of damage of arch bridges at home and abroad,the factors influencing the damage of reinforced concrete arch bridges and the mechanism of disease damage were analyzed from various aspects.2?Determine the constituent elements of the index system,and create the evaluation index system.3?Based on the fuzzy comprehensive evaluation principle and the advantages and disadvantages of AHP and maximum entropy method,a fuzzy comprehensive evaluation model of structural damage condition of reinforced concrete arch bridge is established on the basis of comprehensive weighting method to analyze the weight of each index factor.4?Aiming at the main arch structure of a reinforced concrete arch bridge,a lot of testing and testing work are done according to the specification,including the appearance inspection,nondestructive testing,static load test and dynamic load test to analyze the data.Based on the damage test data of the bridge,the fuzzy comprehensive evaluation model of the main arch structure of the bridge is built by fuzzy comprehensive evaluation.The results show that the model can effectively evaluate the structural damage of reinforced concrete arch bridges.On the one hand,the existing structural damage analysis of reinforced concrete bridges can be scientifically analyzed and evaluated soas to take correct measures for future bridge construction,repair and reinforcement Provide scientific basis.On the other hand,the new project can be more rational design,analysis of bridge structure damage factors,thereby enhancing the level of engineering design,construction quality and reinforcement maintenance management level.It can be seen that the structural damage analysis and evaluation have great economic and social benefits,meanwhile,it has the practical significance of serving the structural reinforcement of active service and the theoretical significance of guiding the structural design.