Research on Axial-Tension Performance of Steel Plate Composite Shear Walls

Abstract

When a super high-rise building is subjected to high intensity earthquake and the building has large height-width ratio, the overturning moment under rare earthquake may cause large tensile stress in the core tube shear walls. Core tube wing walls perpendicular to the direction of earthquake are subjected to axial tension. Since the tensile strength of concrete is small, steel plate composite shear walls (SPCW) are adopted to resist large tensile stress. By using non-linear finite element method, the stress of SPCW under axial tension is studied, including cracking load, stiffness variation, hysteretic performance and tensile strength capacity. The results show that concrete contributes to the tensile strength capacity and axial stiffness of the component. A method for calculating the maximum crack width is proposed. The factors influencing the crack width are evaluated, including steel ratio, layout of steel section and rebar. A reduce-scaled axial tension SPCW test is carried out and it has a good agreement with the finite element analysis result. Based on experimental and analytical study results, the recommendations for designing SPCW under axial tension states are proposed.