Analysis Of The Behavior Of An Reinforced Concrete Simply-supported T-beam Of Xin'nan Bridge And The Identification Of Its Bearing Capacity

In recent years,with the continuous development of China's economic construction,many bridges have been built overwhelmed because of the growing heavy traffic,leading to the emergence of many diseases of the bridge structure,which would led to the structure of the security threat.Therefore,the bridge safety assessment has become increasingly important.it is essential for us to obtain the assessment of the work of the bridge visual inspection,testing and carrying capacity.This paper takes the Guangdong province's xing-ning Hungnam simply-supported reinforced concrete T-girder of bridge an old bridge as the background,in order to explore into the bridge carrying capacity evaluation method of research.Part?: The paper describes the history of domestic and foreign old bridge,including the the development of bridge's inspection and assessment work.At the same time it introduces the current research,which related to the inspection and assessment of domestic and foreign bridge,and also the specification brief comparative analysis.Part?: Based on the highway bridge conservation norms,we have the deck system,superstructure and substructure Hungnam bridge targeted visual inspection,the strength of concrete and reinforcement steel protective layer bridges non-destructive tested.Part?: According to the actual situation of the bridge,using finite element analysis software of midas / civil to build the bridge design model checking the capacity of the bridge,to get the theoretical data of the bridge design safety margin.Part?: Be based on the actual situation for the existing bridge,we made the project of the load test program to develop and master the actual working conditions of the bridge by bridge test.We obtained the bridge's deflection and stress curve grasp the actual working conditions of the bridge,and ultimately to the carrying capacity of the bridge to be assessed;and ultimately the carrying capacity of the bridge to be assessed.Part?: Through the bridge pulsating,vibrating and jumping sports car forced excitation tests,etc.,we can obtain the actual dynamic characteristics of the bridge,and evaluate the impact factor and the dynamic stiffness of the bridgeIn this paper,the calculation and analysis of field trials combined method of carrying capacity assessment,to better ensure the safety of the bridge structure.