ASEISMIC BEHAVIOR OF COMPOSITE SHEAR WALL WITH STIFFENED DOUBLE STEEL PLATES AND INFILLED CONCRETE

In order to study the aseismic behavior of shear walls in super high-rise buildings, the quasi-static test and finite element analysis on steel plate-concrete composite shear walls were conducted. The research focused on the effect of cavity on the aseismic performance, which included failure mode, bearing capacity, hysteresis curves, skeleton curves, ductility, rigidity degeneration and energy dissipation capacity. All specimens failed in the same failure mode, characterized by concrete crushing at the upper wall and local buckling of the steel plate in the corner. The results indicated that the composite shear wall exhibited excellent inter-storey deformation capacity and energy dissipation under high axial forces. The average value of the ultimate drift ratios for all the specimens was 1/61, and bearing capacity decreased with the decrease of length to width ratio of a single tube. A finite element model developed by ABAQUS is used to simulate the performance of this type of composite shear wall and the accuracy of the model is validated through the comparison with the experiment results. Meanwhile, it has been found that the ultimate bearing capacity of the composite shear wall is not significantly affected until the length to width ratio of a single tube decrease to 1.94.