Bearing Capacity Assessment And Composite Strengthening For Reinforced Conrete Arch Bridge

Since the last century,reinforced concrete arch bridge has been one of the most important types of bridge in our country,and plays a key role in the development of infrastructure construction in China.The bridge disease is inevitable in the process of long-term use,and some of them even affect the safe operation of the bridge,especially the damage of bridge structure,which is mainly caused by some external and internal disadvantages.Such as the load effect,environmental erosion,natural disasters,material aging and quality defects.So it's particularly important to strengthen bridge structure.This thesis mainly opens out the research based on the bearing capacity of the bridge and the reinforcement of the structure.And a reinforced concrete arch bridge is used as the engineering background.The main work is as follows:1.Introduce the characteristics of reinforced concrete arch bridge,summarize the common diseases of it and analyze its causes.2.Summarizes the method of bearing capacity evaluation of the reinforced concrete arch bridge.3.Through inspection of the bridge defect,the material condition and the state parameter detection.The bearing capacity of the bridge structure is evaluated by detection,assessment calculation and load testing.4.According to the evaluation results of bridge bearing,analysis of existing research on bridge strengthening before the disease,propose the combined scheme of increasing section strengthening method,reducing the weight of the spandrel structure strengthening method and bonding steel plate strengthening method.In view of the characteristics of reinforced bridge structure,and the static and dynamic load testing after the reinforcement is carried out.5.Compare the test results by before and after reinforcement,and evaluate the effect of composite strengthening from two aspects of static performance and dynamic performance.