Research On Safety Risk Assessment Of Building Construction Based On Improved Matter-element Extension Model

Safety production in the construction industry is closely related to people’s life and property,and is the focus of supervision by governments and enterprises.According to statistics,there were 4096 recorded safety accidents in the construction industry in my country from 2012 to 2018,and the form of safety production was severe.A scientific and reasonable construction safety risk assessment can effectively prevent and control construction safety risks and avoid safety accidents.Through literature research,case analysis and expert interviews,this paper constructs a construction safety risk evaluation index system,applies game theory to combine subjective and objective weights for combination weighting,and constructs a construction safety risk evaluation improvement matter-element extension model.The construction safety risk was quantitatively evaluated,and the effectiveness of the model was verified through case studies.The main contents are as follows:Firstly,on the basis of systematic analysis and summary of relevant research results,through literature research and case analysis,the factors affecting construction safety risks are summarized.After expert interviews and corrections,a construction safety risk assessment index system is constructed.Based on relevant documents and standards,quantification criteria for evaluation indicators have been clarified.Secondly,the order relation method and the entropy weight method are combined,the game theory model is used to combine weights for the building construction safety risk evaluation index,and the building construction safety risk evaluation improved matter-element extension model based on the criterion of asymmetric closeness is established,and applied The model has been verified by an example of a residential project.The results show that the model can quantitatively evaluate the safety risks of building construction,and determine the sensitive influencing factors,verifying the validity and scientificity of the model.Finally,based on the aforementioned combination weights of construction safety risk evaluation indicators,the Pareto analysis method is used to classify construction safety risk influencing factors according to their importance,and measures are proposed for the main influencing factors to manage construction safety risks.Provide theoretical support.The main innovations of this paper are: the establishment of an improved matterelement extension model for building construction safety risk assessment based on the criterion of asymmetry closeness to quantitatively evaluate the construction safety risks,and determining the main influencing factors of building construction safety risks.The optimization of construction safety control measures provides quantitative support.