Study On The Test Evaluation And Reinforcement Scheme For The Impact Of Super High Vehicle In The Damaged RC Simple Supported Beam-bridge

The rapid development of the economy makes the urban scale of our country continue to expand, which causes traffic congestion problem. So a large number of cities across the line overpass came into being. The urban bridges which are important for urban traffic system to solve the problem of traffic congestion, but the phenomenon that super high vehicles impact flyover frequently occurs, the different components of bridge structure are damaged in the accident, which c auses that the service performance and structural performance of bridge are severely affected, and this not only seriously threatens the normal operation of the transportation, but also causes huge economic losses.Some researches that super high vehicles impact flyover carry out at home and abroad. The numerical simulation that super high vehicles impact bridge pier and superstructure implements based on the large finite element software, which analyzes impact process, damage form and failure mechanism, ho wever, there is little research on the test evaluation and damage parameters analysis of the damaged bridge with the impact of super high vehicles. With the increasing of this phenomenon, how to evaluate the damage degree of the bridge damaged by the impact of super high vehicles scientifically is very important for bridge maintenance and strengthening. A certain simply supported bridge which has suffered from the impact of super high vehicles is the object of study, the specific research content is as follows:(1) The bearing capacity of RC simple supported beam-bridge with the impact of super high vehicles is evaluated based on the technology status detection, which mainly carry out the investigation of bridge appearance detection, material status and damage, and obtain the basis of the evaluation for the bearing capacity of bridge, then judge the service performance and structural performance of bridge according to relevant standards.(2) The research drafts the load test plan and carries out the load te st for damaged bridge which analyzes the test procedure and results, and evaluates the bearing capacity of the damaged bridge based on the test results.(3) The finite element model updating for practical engineering examples is developing based on test data and the theory of model updating. The model that is updated need to need to further verify, it is necessary to analyze the damage prognosis parameters after verification. We can truly simulate the bearing capacity of bridge after damage by numerical simulation analysis, which can provide reference for numerical simulation of carrying capacity evaluation.(4) The bridge maintenance and reinforcement are analyzed based on the results of the damage prognosis parameters analysis and the bridge original des ign data. A scientific reinforcement scheme is proposed. The construction technology of damaged bridge is described in detail combined with the engineering example, which can provide a reference for the reinforcement and maintenance of the damaged bridge with the impact of super high vehicles.