Study on axial compressive bearing capacity of composite shear wall with double-skin steel plate

This study conducted a steel-plate buckling analysis and a stress analysis of confined core concrete in a composite shear wall with a double-skin steel plate. Using the bottom shear wall of a core tube in the Beijing Chinese Statue as a prototype, the study tested the 1/4-scale concrete composite shear wall with a double-skin steel plate and a composite shear wall with an embedded steel plate with respect to axial compression, and then compared and analyzed the axial bearing capacity and load-displacement curves. Considering the influence of steel-plate buckling on the axial bearing capacity and the improved compressive strength of confined concrete, this paper proposes a calculation formula for the bearing capacity of a composite shear wall with a double-skin steel plate. Comparing this calculated values with those of other methods, the calculated values of this proposed method fits best. Based on relevant data in the literature regarding axial compression performance tests of composite shear walls with a double-skin steel plate, the axial compressive bearing capacity values obtained by this proposed formula are in good agreement with experimental results.