Research On The Restrictive Factors And Countermeasure Of The Promotion And Implementation Of Assembled Buildings In China

The traditional construction industry adopts the method of pouring concrete on site,which has extensive construction,low quality assurance rate,long construction period,serious environmental pollution,especially energy consumption in construction industry.Compared with the developed countries,the proportion of energy consumption in construction accounts for 30%-40% of the total energy consumption,while in China the ratio of energy consumption in construction industry is as high as 46%.High energy consumption in construction industry are the main problems restricting the development of construction industry.Since the 21 st century,the increasing scale of urbanization and the sharp increase of demand for building supply,it has become an important direction for governments at all levels and related fields to promote the development of the construction industry to find a new way of building construction and realize the deepening reform of the construction industry in order to solve the bottleneck problem restricting the development of the construction industry.After decades of development,the application of assembled buildings in Japan,the United States and other countries has been relatively mature,while China's assembled construction industry has just started,and there are many shortcomings in the related construction technology,structural performance,industry specifications and promotion policies,which make the proportion and scale of assembled buildings low,and face many obstacles to popularization and Application in practice.Therefore,it is necessary to further study the key factors that restrict the implementation of assembly building promotion in China,and put forward research strategies to better promote the development of assembly building and help the construction industry to complete the reform.The main research contents of this paper are as follows:(1)I read a lot of literature and policy documents to fully understand the definition,characteristics and differences between assembly buildings and traditional cast-in-place buildings,and summarize the research status and relevant basic theories of assembly buildings at home and abroad.(2)According to the actual promotion situation,the obstacles faced by China's prefabricated buildings in the promotion process were understood through the form of expert interviews.By referring to the existing literature on the development constraints of prefabricated buildings,44 factors restricting the promotion and implementation of China's prefabricated buildings were preliminarily extracted.(3)Through online and offline questionnaire survey,SPSS22.0 software was used to conduct exploratory factor analysis on the collected data.According to the results of factor analysis,5 categories of common factors and 24 main factors were identified.In order to further explore the relationship between the main constraints and the impact on the implementation level of assembly buildings,five hypotheses are put forward based on the existing results,and a structural equation model is constructed.The data are imported into AMOS 22.0 software to fit the data and calculate the path coefficient.The model is optimized after three revisions,and the constraints are quantitatively sorted according to the path coefficient.Determine the magnitude of the impact of various factors on the implementation level of assembly building promotion.(4)Through the structural equation model,the weight of each restrictive factor is clearly obtained,and the key restrictive factors for the promotion and implementation of assembly building in China are identified.The countermeasures and suggestions for accelerating the promotion of assembly building are put forward from five aspects: policy guidance,market promotion,economic incentive,technical support and social awareness.