Study On The Method Of Simply Supported Beam Bridge Safety Assessment

Bridge construction is a important national infrastructure and bridge engineering is closely linked with the coordinated and sustainable development of the social and economic. As the bridge construction has the feature of high development,huge investment and large ecnomic influence, the bridges safety performance is particularly important. To ensure smooth road transport and national economic development, it is significance of theoretical and practical to evaluate the bridge structure security situation correctly and make economic rational reinforcement measures. And it is also an urgent and important research subject in the field of bridge construction. The bridge safety evaluation is to feedback to the users thought the collected message that has been filtrated,decomposed and analysised,and finally,to propose measure that will be efficient,resonal and economical in management;therefore bridge safety assessment is the premise of scientific management, maintenance and upkeep of the bridge.This paper is on the background of the two bridges in Changhu and National Avenue in Nanning discussing the reinforced concrete simply supported beam bridge safety assessment method, mainly on the following several aspects of the research work:1, introduce the state of the bridge structure detection method and bridge structure disease diagnosis analysis method thought actual bridge project.2, Sum up the basic content of safe assessment on reinforced concrete bridge;compare with different kinds of nondestructive testing methods; analysis the methods of the vibration,strain mode and dynamic coefficient.3, discusses the bridge structure safety assessment method of simple bridge by BCI evaluation and load test (static loading and dynamic loading) and fluctuation test contrast analysis on the two bridges in Changhu and National Avenue in Nanning.Propose the reasonable management and maintenance program by evaluating the state of the bridge throught analysing the experimental data.4, discusses the feasibility based on the bridge condition index (BCI) evaluation conclusion which was improved of deciding whether to do the bridge regular structure detection.