Experimental Study On Seismic Behavior Of Integral Prefabricated Wallboard Of Steel Column-Assembled Beam Wall

The steel column-assembly beam wall integrated prefabricated wall is a new type of composite structure system.Compared with the traditional steel frame filled concrete wall board system(SRCW system),it not only improves the overall assembly rate of the components.Moreover,the overall lateral stiffness of the structure is enhanced by the internal inclined support steel pipe in the wall plate,and the seismic requirements with multiple lateral resistance under horizontal seismic load are satisfied.In recent years,China has vigorously advocated the development of rural structures,and at present,the installed walls used in the market have basically served only as a maintenance system.The new composite structure system proposed in this paper is mainly suitable for low-rise buildings.Therefore,it has obvious advantages as the seismic structure system of the low-rise buildings in the earthquake zone.The main contents of this paper are as follows: 4 single layer single span 1/2scale members are designed,and their structural dimensions are exactly the same.By studying whether the wall and edge columns are welded or not and the structural form of the beam column nodes(just connected or semi-connected)these two factors,the low cyclic load tests of the four components are carried out.According to the test,the failure mode,hysteresis performance,stiffness degradation,deformation and ductility,energy dissipation ability and shear moment distribution of the component as a whole are obtained,and the real-time strain analysis of the surrounding shear connecting parts is carried out.The interaction law between wall plate and frame under horizontal load is obtained.Compared with the other three components,GJ-1 has the best seismic performance,i.e.beam-column rigid connection,wall plate and side column welding.When the members reach the ultimate load,the ratio of shear force to bending moment of the wall plate does not suddenly decrease,which indicates that the wall plate has not completely withdrawn from work and still shares part of the shear force and bending moment,so the hysteretic curve of the component is full at this stage.The stiffness degradation is slow and the energy consumption is good.Finally,through regression fitting of test data and dimensionless treatment of all unloading stiffness at each stage,the integral skeleton curve model,stiffnessdegradation rule and hysteresis rule of components are determined,and the restoring force model of integral prefabricated wallboard of steel column-assembled beam wall is established.The calculated curve is in good agreement with the test curve.