Research On Influencing Factors Of Assembly Building Cost Based On SEM

In the past three decades,while the urbanization rate in China has been increasing,it has also brought about problems such as environmental pollution and energy waste.The traditional construction methods have been unable to meet the progress and development of the times.The emergence of prefabricated buildings provides new solutions for the transformation and sustainable development of the construction industry based on its energy-saving and environmental protection characteristics.In order to further implement the call for energy conservation and emission reduction in the construction industry required by the state,governments at all levels vigorously support the development and innovation of prefabricated buildings.However,compared with Europe and the United States,the development of prefabricated buildings in China started late.During the development process,due to the immature cost management and the high cost of prefabricated buildings,the development of prefabricated buildings was greatly hindered.Therefore,it is particularly important to determine the cost structure of prefabricated buildings and find out the reasons for the high cost.Based on this,the thesis unfolds the research on the factors influencing the cost of prefabricated buildings,finds out the key factors of cost control,and puts forward corresponding countermeasures to provide some reference for the development of prefabricated buildings in China.This article first introduces the relevant concepts of prefabricated buildings and their costs,and analyzes the status quo and problems of prefabricated buildings;secondly,they elaborate on related theories,including building cost control theory,explanatory structural models,and structural equation models.Introduction to related theories.Then through the literature reading method,some factors were preliminarily identified on the basis of previous studies;by visiting experts,professors and professional engineers,some other factors affecting the cost of prefabricated buildings were further identified,and the influencing factors of cost control of prefabricated buildings were determined Checklist.By categorizing these factors,five first-level factors of design,policy,production,management,transportation and construction are obtained,and the first-level factors that affect the cost of prefabricated buildings are Boolean calculated using the interpreted structural model(ISM)according to the method of expert scoring.Determine the hierarchical relationship between factors in prefabricated buildings.The hypothetical model in the structural equation model is constructed according to the hierarchical relationship obtained by explaining the structural model.Then design the questionnaire based on the influencing factors,and test the reliability and validity of the questionnaire.In this paper,the structural equation model is used to divide the cost-influencing factors of prefabricated buildings into five external latent variables: design,policy,production,transportation management,and construction,and a hypothetical model of internal latent variables of cost control effects of prefabricated buildings.Each latent variable of external factors contains three to five measured variables.Here we have selected two observation variables to reflect the cost control effect of prefabricated buildings.The structural equation model is used to perform fitting,evaluation and correction operations to finally verify the hypothesis and then analyze the empirical results.Finally,corresponding suggestions and countermeasures are given for the main factors affecting the cost of prefabricated buildings.Finally,from the analysis of the model results,(1)policy factors in prefabricated buildings have a positive correlation with design factors,management and transportation factors.Design factors have a positive correlation with technical factors and production factors.Production factors,technical factors,and management and transportation factors all have positively related effects on the cost control of prefabricated buildings.(2)The production process of prefabricated components has the greatest impact on design factors,the tax policy has the greatest impact on policy factors,the technical level of workers and the standardization of molds have the greatest impact on production factors,the construction level has the greatest impact on technical factors,and empiricism has The management transportation factor has the greatest influence.According to the above research results,the cost control countermeasures in the design stage,production stage,management and transportation stage,and construction and installation stage are proposed.It is of guiding significance for enterprises to improve technology,solve problems encountered during construction,improve construction and installation efficiency,and reduce the cost of prefabricated buildings.