Research On Factors Affecting The Cost Of Prefabricated Buildings And Control Measure

With the acceleration of China’s economic transformation and development,the traditional construction method based on cast-in-situ concrete urgently needs to be transformed to standardized construction.Although the building assembly rate in China has continued to increase in recent years,the use of prefabricated buildings will lead to increased costs,and there are many factors that affect the cost of prefabricated buildings,making cost control difficult,seriously restricting the promotion of prefabricated buildings.Therefore,studying the factors that affect the cost of prefabricated buildings and control measures is of great significance for reducing the cost of prefabricated buildings and improving the market recognition of prefabricated buildings.In this paper,analytic hierarchy process(AHP)and interpretive structural model(ISM)are used to study the factors affecting the cost of prefabricated buildings,and corresponding cost control measures are proposed based on the research results.Firstly,it introduces the development and research overview of prefabricated building cost influencing factors,determines the relevant factors affecting prefabricated building cost through literature research and comparison with traditional building increment,and establishes 5 first level indicators and 17 second level influencing factors.In combination with the case project,the weight of the corresponding prefabricated building cost influencing factors is determined by the analytic hierarchy process,The final screening identified 12 important influencing factors that affect the cost of this project(assembly rate and prefabrication rate,standardized design,mold turnover rate,selection and layout of lifting machinery,construction technology level,rationality of prefabricated component splitting,integrated design,national policies and standards,component factory scale and production capacity,transportation plan,reasonable storage of components,and collaborative cooperation between work types).Secondly,according to the pairwise relationship among the 12 influencing factors,an interpretative structural model for the cost influencing factors of prefabricated building is established.Finally,among the project cost influencing factors,the top level influencing factors are the rationality of prefabricated component splitting,mold turnover rate,selection and layout of lifting machinery,transportation plan,and collaborative cooperation between work types;The influencing factors of the intermediate power layer include integrated design,reasonable storage of components,standardized design,construction technology level,component factory scale,and production capacity;The deep-seated influencing factors are assembly rate and prefabrication rate,national policies and standards.Based on the results of Analytic Hierarchy Process and the established ISM model,propose control strategies for the cost influencing factors of this project.In the implementation of the project,the practicality of Analytic Hierarchy Process(AHP)in determining the weights of key influencing factors in the project was verified,and the interrelationships between various important cost influencing factors in the project(ISM model)were determined.The proposed cost control strategies provide certain reference significance for cost control in similar assembly projects in the future.