Performances And Application Research Of EPS Composite Wall In Hot Summer And Warm Winter Area

The wall developed for Fujian,Guangdong and other provinces as the representative of the summer hot winter area is based on the application of EPS wall in cold regions and hot summer and cold winter areas,which with thermal insulation,excellent seismic performance,the construction of fast features.It is necessary for its research because the South has no relevant technical regulations and substantive engineering applications.A new EPS composite wall is developed for the hot summer and warm winter regions represented by Fujian Province and Guangdong Province.This composite wall system connects the EPS module(foamed polystyrene insulation board)into a cavity structure by connecting the bridge in the order of the bottom line,and placing the steel bar on the connecting bridge,and then injecting the concrete into the cavity Constitute the insulation load-bearing integration of the wall.It is characterized by the module can be removed according to the needs of the project or retained,the demolition of the module can be repeated several times to save the cost of the project.The main work of this paper includes:First of all,Research on development and design,thermal performance calculation and construction technology of a new EPS composite wall was learned from the cold area and hot summer and cold winter area EPS wall application research results.Secondly,the nonlinear finite element analysis of EPS composite wall was carried out by means of ANSYS software.The effects of aspect ratio,concrete grade,axial compression ratio and reinforcement ratio on wall bearing capacity and ductility were investigated.Finally,ANSYS and PKPM software were used to establish a three-storey three-room solid model,and the seismic response characteristics such as inter-layer displacement and displacement angle were analyzed.The safety performance of the house was investigated and reasonable suggestions were put forward.The main conclusions are as follows:1)The EPS composite wall developed by the excellent thermal performance and construction speed,when using unilateral module structure,it can be able to meet the hot summer and warm winter insulation requirements;The thickness of concrete which is 120 mm is fully meet the hot summer and warm winter wall strength and safety performance requirements.2)The aspect ratio of the specimen has a great influence on the carrying capacity and ductility of the wall.The carrying capacity of the wall decreases with the increase of the aspect ratio,while the ductility is opposite,In the range of 0.8 to 2.0,the aspect ratio is almost linear with3)the bearing capacity and ductility.The ultimate bearing capacity of the component increases with the increase of the axial compression ratio,but with the decrease of the ductility coefficient,the bearing capacity is not feasible by the axial compression ratio,and the reasonable axial compression ratio should be used in the engineering.4)Increasing the concrete grade can increase the ultimate carrying capacity,but the effect is not obvious,and the effect of the limit displacement and ductility is not big,the actual project should take the C20-C30 grade.certain reinforcement ratio has a good structure displacement and ductility Improve the role,it is recommended low-level EPS wall reinforcement rate of about 0.2%.5)Under the action of self-weight and other load,EPS composite wall houses are mainly vertical deformation,and the doors and' windows are prone to stress concentration,the project should be taken to increase the reinforcement or constraint edge components and other measures.The above research results can provide reference for the formulation of relevant technical rules of EPS wall in hot summer and warm winter area,and lay the foundation for its engineering application.