Experimental Study On The Seismic Behavior Of A Shear Wall With Concrete-filled Steel Tubular Frames And A Corrugated Steel Plate

The steel-concrete composite shear wall is a new kind of shear wall combined with steel and ordinary concrete shear wall.Such combined shear wall can effectively combine steel and concrete to take advantage of steel.It has many forms,such as concrete filled steel tube shear wall,steel reinforced shear wall,steel plate shear wall,and other forms.In this paper,a new type of composite shear wall is designed,which replaces an ordinary concrete column with CFST column as the restrained edge member of the shear wall,and the corrugated steel plate is placed in the concrete wall slab.In this paper,the new shear wall has been tested with low cyclic loading,and the aseismic properties such as failure process,failure form,bearing capacity,deformation ability and hysteretic performance are studied.The test results show that the failure mode of the specimen is the flexure-shear type.The tension side of the concrete-filled steel tubes is torn,and the steel bars in the wall yield and bulge outward.The concrete at the bottom of the wall is fully detached and peeled from the specimen.Compared with those of other specimens,the deformability,and energy dissipation capacity of specimen GSW3 is significantly improved.The test results show that the damage analysis of the new shear wall using two kinds of damage calculation methods is carried out.The first one is the stiffness-based Roufaiel damage model.The second one is the deformation and energy-based Park & Ang damage model.The calculation and analysis show that the damage model of Park & Ang is in agreement with the failure of the specimens.In this paper,FEM software ABAQUS is used to simulate and analyze the experimental shear wall specimens,the results of finite element numerical simulation and the actual test results are compared and analyzed,and the study shows that these two differences are not significant,which indicates that the new shear wall model established in this paper is effective.Finally,this paper establishes 4 series of new shear wall models,mainly studies the influence of wavelength Q,amplitude A,axial compression ratio and concrete strength grade on new shear seismic performance.The results show that the larger the amplitude A is,the greater the limit load of the specimen is.In the case of the same wavelength or amplitude,the ratio of wavelength to amplitude is closer to 1,the ultimate load of the specimen is larger,and the descending section of the skeleton curve is smoother.The strength ratio of GSW3-4 series shear Wall is the smallest under the condition of the axial compression ratio of 0.1-0.6,which is helpful to realize the goal of "big earthquake does not fall".The strength of concrete has little influence on the wall of corrugated steel plate with concrete-filled steel tube frame.