Study On Fuzzy Evaluation And Evaluation System Of Concrete Structure

Some important engineering and buildings are chronically in the environment. After a long-time working, there will be some lacunas and damnifications of materials in these structures, which will influence the safety of structures. In order to ensure engineering and buildings to work in the course of nature normally, it is necessary to carry through a list of detection, analysis, evaluation and reinforce. As a primary kind of material in construction, quality of concrete is the key factor to influence the appraisal grade of the structure.There are many multiform influencing factors of concrete structure, most of which are qualitative, stochastic and accidental. So evaluation targets take on a fuzzy form. Therefore, based on the fuzzy theory put forward by Pro.Zadeh, the dissertation establishes fuzzy synthetical evaluation model of concrete structure quality and tentatively explores the evaluation system based on Visual Basic.According to a lot of the engineering experiences and the correlation criteria, 8 kinds of primary factors are selected, which consist of three qualitative ones and five quantitative ones. And each factor's subordinate functions are constructed in the first model. At the same time the two-stage index values of the effect factors are determined according to the statistical method.Visual basic is one of cogent tools to explore and establish application with graphical interfaces in windows operating system. With VB, lists of graphical interfaces are established and all calculation method and process are compiled into program codes. In the evaluation system of concrete structure, the user facing visual forms, the evaluation result can be gotten according to the interfaces clew.According to giving a demonstration in the end of dissertation, the evaluation system is proved to be exercisable, and fuzzy synthetical evaluation model of concrete structure is effectual and feasible.