Study Of The Assessment For Existing Highway Concrete Beam Bridge

Bridge is the hinge of the highway. The carrying and transitable capability of bridge is the key to keep the line smooth. With time going on, more and more bridges will reach or approach their design reference period and the structural damages will appear because of kinds of reasons. Lack of carrying capability, material aging and damages in the existing bridges have been noticed all over the world. Servicing, assessment and reconstruction for existing bridges have become the focus in engineering field.The connotation and character of the assessment of existing bridge is expounded. The status of research on assessment of existing bridge has been summarized and reviewed. Based on summarizing domestic and foreign results about the assessment of existing bridges, more research on the assessment of concrete beam bridge has been accomplished in this thesis. The paper indicates the actual problems of assessment of highway bridges in China and a hierarchy assessment model is established based on the systematic analysis of existing highway concrete bridge faults. Some new theories in mathematics such as the uncertain AHP and information entropy based decision theory are brought into use. Finally, a corresponding program of assessment of the state for existing highway concrete beam bridge is worked out, and is proved feasible and reasonable through application to the practical bridges.