Materials And Multiple Factors On The Whole Life Cycle Of Green Building Cost Impact Study

In order to achieve the goals of the 14 th Five-Year Plan and the 2035 Vision,China’s GDP will need to grow at an average annual rate of around five per cent over the next 15 years,and industrialisation and urbanisation will continue at a rapid pace,but this will also bring a series of challenges such as financial constraints and environmental degradation.As a new type of energy-saving and environmental protection technology,green building can effectively reduce energy consumption and environmental pollution.In view of the basic national conditions of China’s large population,relative lack of resources and weak environmental carrying capacity,we must unswervingly follow the path of sustainable development and actively promote green development and the popularisation of green buildings.However,in recent decades,the development of green buildings has not been as successful as it could have been,mainly due to their high cost,so how to effectively control the cost of green buildings has become the key to their sustainable development.Current research on the cost of green buildings has mainly focused on the economic and social aspects of green buildings,but has neglected to analyse the influencing factors and related laws,and has failed to fully explore the potential relevance of the various stages of the whole life cycle of green building projects.Therefore,this paper provides an in-depth study of the costs required for the whole life cycle of a green building to ensure its sustainability and economy of use.In order to effectively control the cost of green buildings,this paper uses literature research to screen out 17 green building cost influencing factors such as materials,and categorises them into five dimensions from a whole life cycle perspective: development and design,construction and building,maintenance and recycling,resources and energy,and policy and environment.A combination of DEMATEL and entropy weight method is used to analyse the 17 influencing factors subjectively and objectively in order to obtain the combination weights of each influencing factor,explore their importance to green building costs and identify the key influencing factors.At the same time,a fuzzy comprehensive evaluation was conducted for the whole-life cost impact dimensions of green buildings,and the importance of each impact dimension was determined according to the maximum affiliation principle.Finally,a whole-life cost impact evaluation model for green buildings is established.Finally,the fuzzy comprehensive impact evaluation model was used to empirically analyse the D10 project of Guo Bo Xin Cheng,which has obtained the three-star green building design certification,and the data was collected and collated through a questionnaire survey.The study found that resources and energy play a crucial role in optimising the whole life cycle costs of green buildings,and their impact on costs is most significant,while construction and building,policy and environment have a more general impact on the whole life cycle costs of green buildings,and development and design,and maintenance and recycling have a smaller impact on the costs of green buildings.Of the 17 influencing factors,construction materials have the most significant impact on cost,while waste recycling and utilisation,contract cost targets,green technology,construction management and government policies all have a significant impact on cost.The case study verifies the feasibility of the model and proposes corresponding cost control measures for these important factors,which provides a theoretical basis for the promotion of green building projects in the future and also provides some guidance to promote the healthy development of green buildings in China.