Based On Improved Multi-level Fuzzy Theory On Comprehensive Evaluation System Of Concrete Beam Bridge

Since the completion of the bridge structure,the level of carrying capacity during the whole service period is constantly changing,and the general trend of change is from new to old,from strong to weak,from high to low.In recent years,the research on the evaluation method of carrying capacity of active concrete bridge has become a hot spot and a difficult point.Therefore,this paper focuses on the evaluation of carrying capacity under the influence of multi-factor comprehensive.The main contents are as follows:1.Based on the analysis of the main influencing factors of bearing capacity of bridge structure,six main factors were selected as the research object,and the relationship between the factors was analyzed synthetically.The comprehensive evaluation system of carrying capacity was established by means of fuzzy mathematics theory and non-deterministic analytic hierarchy process.Real genetic algorithm was used to determine the optimal weight of each factor determining the carrying capacity of the comprehensive reduction factor;2.Based on the analysis of the main influencing factors of bearing capacity of bridge structure,six main factors were selected as the research object,and the relationship between the factors was analyzed synthetically.The comprehensive evaluation system of carrying capacity was established by means of fuzzy mathematics theory and non-deterministic analytic hierarchy process.Real number genetic algorithm was used to determine the optimal weight of each factor determining the carrying capacity of the comprehensive reduction factor;3.Based on the comprehensive evaluation system of carrying capacity,a rapid comprehensive evaluation system(V1.0)for loading capacity of active concrete girder bridge was developed by visual programming tool Visual Basic 6.0,and 27 different sections of active concrete beam bridge The feasibility of the rapid comprehensive evaluation system(V1.0)was verified,and then the load-bearing capacity reduction coefficient of the non-destructive testing data of the real bridge was analyzed by regression analysis.The capacity of the active concrete beam bridge in the applicable service period was given the regulation;4.The Monto-Carlo method was used to simulate the real random flow and the initial finite element model of the bridge was modified by means of traffic flow monitoring data and an in-service prefabricated prestressed concrete box girder bridge.The random flow-bridge coupling Vibration analysis system(BDANS)for the analysis platform was used to obtain the response of the bridge under the random flow,according to the decay of the bearing capacity of the results of the bridge determined the real-time carrying capacity,and then assessed the safety of an active assembly of prestressed concrete continuous box girder bridge.