Experimental Study On The Seismic Performance Of A New Type Of Concrete Polystyrene Moulded Lattice Wall

The concrete polystyrene mold shell lattice wall building system has been ahead of other energy-saving building systems.The system has a good advantage in environmental protection and energy saving,simplified construction and so on.Cement polystyrene moulded shell lattice concrete wall is used as the insulation layer of the structure by using cement polystyrene moulded shell as the formwork and reinforced concrete as the skeleton bearing member to evenly distribute the load on the structure.However,the system has not been widely used in middle and high rise buildings in China,and there are some problems in the actual promotion.The research on the seismic performance of the wall is not perfect.Therefore,the stress on the wall is studied,and the main work is as follows:(1)In practical engineering,it is found that the steel bar position accuracy is not enough and is not easy to be fixed when the wall with a circular section of the cavity of the existing cement polystyrene mold shell is binding the reinforcement frame;A new type of square section wall with the same section area but larger flexural section coefficient is proposed after the exploration of the section form of the wall-frame beam-column,and three pieces of wall specimens are designed for the square section of the lattice beam-column,and the seismic performance is tested by taking the axial compression ratio as the influence parameter.(2)of the cement polystyrene shell mould wall under horizontal reciprocating load test specimens,by the experimental observation wall specimens under axial compression ratio of the stress distribution,through the analysis of the cracking load and ultimate load of the wall specimens and the corresponding displacement data to explore the axial compression ratio on the wall of the hysteresis curve,skeleton curve,stiffness degradation,ductility coefficient,the influence of the seismic performance indexes such as energy consumption coefficient,verify the wall the formula to calculate the shearing resistance of applicability.(3)Through ABAQUS,finite element simulation analysis was carried out on the lattice wall specimens with cement-free polystyrene moulds.The rationality of the finite element model is verified by comparing the simulated horizontal reciprocating load results with the experimental results.Based on the comparison of the seismic performance of the concrete skeleton structure with circular section and square section,the feasibility of the new concrete skeleton structure is analyzed from the skeleton curve.Through the finite element model,the parameters of axial compression ratio and aspect ratio of the new type of wall are analyzed to study the influence of different parameters on the seismic performance of the new type of wall,and the variation rules of bearing capacity and ductility performance of the wall under different influencing factors are analyzed in detail.There are 43 figures,13 tables and 64 references in this paper.