The Research On Rapid Test Detection And Evaluation Technology Of Existing Bridges Research Report

Structural damage will occur due to various factors causing the reduction of bridge bearing capacity and durability and affect the operation safety during the long-term use of bridges.How to evaluate the bearing capacity of the existing bridge structure objectively and accurately and determine to do the maintenance and reinforcement is an urgent problem to be solved.Bridge dynamic load test is an important method for rapid detection and identification of bridges.However,it is still impossible to establish the relationship between the results of dynamic load test and the bearing capacity of the bridges and the data of dynamic load test can not be fully utilized.Therefore,it is very important to study the relationship between the dynamic load test results and the bridge bearing capacity and it is useful to the evaluation of bridge structure.By using the methods of theoretical analysis,finite element simulation and experimental research,this paper makes a research on how to quickly assess the bearing capacity of the bridge structure focusing on the status of existing concrete bridge detection which considers the dynamic increase factor,dynamic deflection and dynamic strain as the research object.A rapid evaluation method of bridge bearing capacity based on moving load test has been established in this paper and the feasibility and accuracy of the method are verified by field load test.