Shear strength of steel plate shear walls considering the gravity load and in-plane bending moment effect by vertical stress distributions

Abstract

Without considering the effect of the gravity load and in-plane bending may overestimate the shear strength of a steel shear wall. In this work, the gravity load and in-plane bending moment are equivalent to a trapezoidal distributed load. The effective width model, the cosine distribution and a three-segment distribution were respectively utilized to determine the vertical stress of the infilled steel panel under the gravity and in-plane bending moment. The tension field stress of each inclined tension strip of the steel panel, with considering a reduction caused by the vertical stress, is determined based on the von Mises yield criterion. The shear strength then can be obtained by integrating the shear stress with respect to the area of each strip along the width. The proposed approach was evaluated by an experimentally verified finite element model developed in the software LS-DYNA. Steel walls of different slenderness ratios under different compression and in-plane bending moment are discussed. The results show that the three-segment distribution can describe the effect of the gravity load and in-plane bending moment. The effective width model and the cosine distribution will underestimate the shear strength while that the equation in CAN/CSA-S16-01 will overestimate the shear strength.