| In recent years,the state vigorously promotes the development of prefabricated buildings,and has issued many policies and regulations,which ushers in opportunities for the development of prefabricated buildings in China.On the basis of the previous research of the research group,this paper puts forward a kind of fabricated reinforced concrete wall panel structure with dense mesh.By changing the form of steel bars,this wallboard increases the number of statically indeterminate components,and improves the seismic performance.At the same time,the modified polyphenylene granular concrete is poured out to make it work together with the reinforcement,column limb and beam,which can improve the seismic performance of the components and solve the problems of fire prevention and rust prevention of some steel members in the structure.The main conclusions are as follows.(1)Numerical simulation study.ABAQUS software is used to establish the model of prefabricated lattice column with dense mesh reinforcement and its wallboard,and compared with the previous research results to study its seismic performance.(2)Experimental study.The full-scale specimens of prefabricated reinforced concrete wall panel with dense mesh are made,and the hysteretic curve is obtained through low cycle repeated load test to study its seismic performance.The aseismic performance of the fabricated reinforced concrete side wall panel is compared with that of the prefabricated lateral force resistant wall A in the previous study.(3)Comparative analysis of simulation and experiment.The results of simulation and experiment are compared and analyzed.(4)Research on the working mechanism of the assembled reinforced concrete wall panel against lateral force.Combined with the test phenomena and data,the working stages of the wallboard are defined and described.The wall panel is divided into three anti-seismic lines,the prefabricated reinforced concrete wall panel with three seismic defense lines,the prefabricated reinforced lattice column with two seismic defense lines and the column beam frame model with one seismic defense line are established.The stress and failure process of each anti-seismic defense line are clarified.The main conclusions are as follows.(1)Simulation study.By changing the parameters of reinforcement reinforcement,the seismic performance of the assembled reinforced dense mesh columns with side force lattice structure is improved.Under the action of modified polystyrene granular concrete,the horizontal bearing capacity of the wall panel with the side resistance of the assembled reinforced dense net has increased significantly.(2)Experimental study.The anti lateral force wall panel of assembled reinforced dense net has good seismic performance and strong energy consumption.Compared with the previous research,the ultimate bearing capacity of the wall panel with side load resistance of the assembled reinforced dense mesh is increased by about 2.1% when the steel quantity of reinforcement reinforcement is reduced by 23%.(3)The experimental results are compared with the simulation results.The experimental results show similar horizontal bearing capacity change trend,stiffness degradation trend and energy consumption capacity,and the hysteresis curve,skeleton curve,stiffness degradation curve and energy consumption curve are basically consistent with each other.The finite element software can simulate the seismic performance of the wall panel.(4)The research on the mechanism of the side force resistance of the wall panel with the assembled reinforced dense mesh.The wall panel can be divided into three working stages:elastic stage,elastic-plastic stage and limit stage.The plastic deformation of the modified polystyrene granular concrete slab first occurred in the first stage,and the stiffness decreased rapidly.The steel reinforcement reinforcement in the second and third stages of plastic deformation,the stiffness gradually decreased,and the column limb beam frame was always in elastic state. |
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