Research On Comparison And Selection Of Low Carbon Construction Schemes Based On Analytic Hierarchy Process And Grey Relational Analysis

With the increase of carbon dioxide concentration in the atmospheric environment and the gradual warming of the global climate,countries around the world have begun to realize the importance of the carbon dioxide emission reduction mission.However,China's construction projects account for a large proportion of carbon dioxide emissions,so green low-carbon construction has naturally become the mainstream trend of building construction.In order to ensure environmental benefits,low carbon targets and maximum economic benefits,it is necessary to compare the construction plans before construction.Therefore,it is proposed that a scientific and reliable comparison method is the premise of solving the complex construction scheme comparison,rather than just relying on the individual's subjective judgment.First of all,this paper analyzes the index factors affecting the decision of construction scheme and its importance to the decision of construction scheme based on the actual project overview and the research status at home and abroad.According to the principles of scientificity,comprehensiveness,representativeness and comparability,the scheme comparison index system is constructed,and the evaluation indicators are comprehensively selected from the four aspects of economic rationality,technical conditions,low carbon indicators and environmental impact.Then through the theoretical analysis of the analytic hierarchy process and the grey relational analysis method,and the improved analytic hierarchy process combined with the grey correlation analysis method,a simple and effective evaluation model for the comparison and selection of low-carbon construction schemes is established.After using the analytic hierarchy process to obtain the weight of the evaluation index,compare the optimal values of each index in each scheme to form an ideal scheme,and use the gray correlation analysis method to calculate the degree of association between each scheme and the ideal scheme,so as to judge the superiority of each scheme.The greater the degree of association,the better the scheme.Finally,the engineering example analysis based on the analytic hierarchy process and grey correlation analysis is carried out,and it is verified that the method can provide reference and basis in the decision-making of construction scheme comparison,which has certain practical significance.