Research On Safety Risk Of Assembly Construction Based On Entropy Weight-Analytic Hierarchy Process

In recent years,with the continuous reform of China's construction industry and the continuous promotion of national policies,a new construction mode with assembly construction as the main mode of production has quietly risen.As a new type of building,assembly building has different requirements from traditional building in various aspects,such as technology,quality and function.The assembled building has the characteristics of large components and fast-paced construction.Once accidents occur,the consequences will be more serious.Therefore,we should attach great importance to the risk study of assembly building.In this paper,after extensive study of domestic and foreign related literature on assembly building,safety risk analysis and response of assembly building construction are selected as research topics.Entropy weight-analytic hierarchy process is used to empower safety risk factors in its construction process,and a fuzzy comprehensive evaluation model of safety risk of assembly construction based on entropy weight-analytic hierarchy process is established,and a reasonable and efficient method is found.Risk prevention and control and coping methods.Firstly,this paper identifies the safety risk of assembly building construction.Firstly,the preliminary risk factors are obtained by Delphi method and classified by risk cause theory.Then,the attribute weights corresponding to each risk index and the square sum of the distance between positive ideal value and negative ideal value are obtained by SPSS software,which is used as the criterion for ranking the risk indexes.Next,using the fuzzy comprehensive evaluation model of the safety risk of assembly construction based on the entropy weight-analytic hierarchy process,the safety risk factors of assembly construction are analyzed.This paper expounds the basic process of weighting by entropy weight-analytic hierarchy process,gives the steps of evaluating by fuzzy comprehensive analysis method,and builds the fuzzy comprehensive evaluation model of assembly construction safety risk by entropy weight-analytic hierarchy process.Finally,combined with practical engineering cases,the application of fuzzy comprehensive evaluation model of assembly construction safety risk based onEntropy Weight-Analytic Hierarchy Process in the study of assembly construction safety risk is elaborated in detail,and specific measures to deal with the construction safety risk of this assembly residential project are put forward,which can provide some reference for managers.In the process of research,the following research results have been achieved:(1)Through identifying and analyzing the construction safety risk factors of assembled residential projects,25 initial safety risk factors are obtained.Fourteen of these risk factors are critical.(2)The evaluation method combining the improved AHP with the fuzzy multi-level comprehensive evaluation method uses less information to make the thinking operation in the process of decision-making tend to be mathematic,which makes the complicated decision-making problems with diversification of criteria,concretization of objectives or no structural characteristics more convenient to consider.(3)Operators' safety awareness is weak in the risk of human factors of the project,and the technical level of construction personnel is insufficient;temporary support is unstable in the risk of machine and equipment;managers in the risk factors of management factors lack the ability of risk management on the spot;and operational errors caused by bad weather lighting in the risk factors of environmental factors have greater impact on the risk.