Study On Safety Evaluation System Of Building Structure

The safety evaluation of building structure has just emerged in our country.According to the related research,this industry will become a big industry in the future.In order to evaluate the current situation of building structure accurately,and considering the complexity of building structures and the fuzzy diversity of safety assessment factors,this paper presents a safety evaluation system of building structure based on fuzzy analytic hierarchy process(AHP).The main research work and conclusions were as follows:(1)According to the structural composition of the building,the building was divided into 6 first-level evaluation indexes: ground foundation,load-bearing column,loadbearing beam,wall,floor and roof envelope system.The factors influencing the safety of the first grade evaluation index were analyzed and 23 secondary evaluation indexes were established on the basis of the first grade evaluation index.The evaluation criteria for each evaluation indicator were established through the existing relevant specifications and the results of the collection of the reference data.(2)The fuzzy mathematics theory was introduced into the safety evaluation of building structures through the established evaluation system model and evaluation standard,combined with the principle of analytic hierarchy process(AHP).The judgment matrix was constructed by using the 1~9 scale method,and the weights of each index were calculated.The evaluation results were divided into four safety grades by combining the building damage with the established system.Finally,the safety evaluation system of concrete building was established.(3)Verification of engineering examples.The safety evaluation of the residential building was made by using the established safety evaluation system.Finally,the safety evaluation grade of the residential building was B,but according to the results of the single evaluation,it was shown that there were great hidden dangers in the roof of the building,and targeted measures were needed to be taken.Compared with the existing evaluation codes,the proposed evaluation system of building safety involves all-round indexes,feasible methods and reliable results,which can provide reference and guidance for the evaluation and appraisal of similar building structures.