Low Tower Cable-stayed Bridge Evaluation Based On Fuzzy Theory And Analytic Hierarchy Process

Bridge structure is becoming more and more complicated, the number of bridges inChina in the past few decades has a geometric growth. In recent years,due to the design,construction, operation and maintenance problems caused many aging bridges, Bridgesexisting huge hidden trouble in operation. Bridge state comprehensive evaluation is more andmore be taken seriously, according to the results of the bridge state comprehensive assessmentcan determine bridge health status, useful for disease bridge to make the right deal.Based on the theory of analytic hierarchy process (AHP) and fuzzy mathematicalmodel,Combined with variable weight comprehensive, grey theory and methods of maximummembership degree of improvement method, In view of the concrete of short towercable-stayed bridge constructed state comprehensive assessment system.Use the DongbaoRiver of short tower cable-stayed bridge as relying engineering to calculated,And the resultsare analyzed.My jobs can mainly divided the following three aspects.First of all, based on the bridge state comprehensive evaluation research status at homeand abroad. The existing several popular evaluation method is introduced, in this paper theapplication of analytic hierarchy process (AHP) and fuzzy theory model on the principle andsteps of explanation, and the model of the two kinds of bridge condition assessment offeasibility study.Secondly, I established a unique state concrete of short tower cable-stayed bridgecomprehensive evaluation model. Using analytic hierarchy process (AHP) of short towercable-stayed bridge structure concrete hierarchical analysis model, layered indexweight,.Using the fuzzy theory of short tower cable-stayed bridge comprehensive evaluationindex of concrete operation and analyses, a corresponding membership function is established,combined with stratified index weight the concrete state of short tower cable-stayed bridgeand fuzzy comprehensive evaluation model. And particularity in view of engineering, theapplication of modified variable weight synthesis, grey correlation method, the maximummembership degree method to improve the comprehensive evaluation model of deficiency inrevised and perfected, finally formed a concrete of short tower cable-stayed bridge state of multistage fuzzy comprehensive evaluation system.Finally, set up the Dongbao River of short tower cable-stayed bridge real bridgemultilevel fuzzy comprehensive evaluation model,And to calculate.The fuzzy comprehensiveevaluation results are finally worked out. The results are compared with conventionalcomprehensive evaluation method results and discussed. Then I verify the pr actical value ofthe evaluation method which structed in this article.