Research On Standardization Of Prefabricated Concrete Structure In Affordable Housing

In recent years,due to the increasingly limited land resource,the price of urban housing continues to rise.The urban low-income group is facing a difficult housing problem.To protect the most basic living right of the low-income group,national and local governments have begun to build affordable housing in quantity.Prefabricated concrete construction technology is very suitable for application in affordable housing construction because of its industrialized production mode,of which the design is standardized,the components are commonly and the production is modular.This paper first elaborates the research background and significance of the design and related technology of the prefabricated affordable housing,and analyzes the existing problems.In view of these problems,this paper has carried on the following research:Refer to the affordable housing construction standard of Shanghai and guided by the purpose of ?Design Standardization,Components Commonality,and Production Modular‘,the paper proposes the standardized design for the affordable housing construction with the application of the prefabricated concrete construction technology.Design for the modular dwelling products and the industrialized dwelling solution are illustrated.Proposals for the dwelling combination scheme and industrialized standard floor design(components disassembling)are put forward.Through the comparative analysis of typical assembled case,the prefabrication rate of the main structure is 10% higher than that of the typical case,and the cost and duration are also improved.Then,according to the optimal design scheme,use SAP2000 simulation software to make the time-history response analysis of the whole seismic performance of the multi-layer frame.The stiffness of the plate-beam connection is reduced by 70% by using the reduction stiffness method.The simulation results show that the base shear,interlaminar shear,displacement and interlaminar displacement of the structure can meet the requirements of the specification.Using ABAQUS simulation software to analyze the seismic performance of the prefabricated column connected by grouting sleeve.The results show that with the increase of the axial compression ratio,the ductility and energy dissipation capacity of the prefabricated column are gradually decreased by comparing the failure results,and under the same axial compression ratio,the bearing capacity and energy dissipation capacity of the prefabricated column are weaker than that of the cast-in-place column.By comparing and analyzing the influence of the strength of the grouting material on the seismic performance of the prefabricated column under different concrete strength,it is found that when the strength of the grouting material is much larger than that of the concrete,its seismic performance is better.When the strength of the grouting material is less than or close to the concrete strength,the seismic performance is poor and the damage location appears at the bottom grouting layer.When the strength of the concrete is C35 and the filling strength is 60 MPa,The bearing capacity and ductility of the C35 concrete prefabricated column are less than the required 85 MPa grouting strength,and the bearing capacity and ductility of the C35 concrete prefabricated column can still meet the actual demand.