Macro modeling of composite shear wall with stiffened steel plates and infilled concrete

Abstract

In high-rise buildings, traditional concrete shear walls have many limitations. This paper proposes a composite shear wall with stiffened steel plates and infilled concrete (CWSC), offering high bearing capacity, significant deformation capacity, and energy dissipation ability. The ductility coefficient ranges from 2.75 to 3.56, with an average ultimate drift ratio of 1/30, surpassing the 1/80 limit specified in the shear wall code. This paper also presents a macro model for CWSC based on experimental results. Studying the strain gauges in the steel plate reveals the stress mechanism in the composite shear wall, where the central region experiences shear forces while the corner regions undergo tension and compression. A comparison between the results of the macro model and existing experimental data demonstrates the ability of the model to accurately predict the hysteresis curve and seismic performance of CWSC. Likewise, a comparison of the macro model with hysteresis and skeleton curves from 15 different literature sources on composite shear walls shows that the macro model can effectively simulate the seismic performance of composite shear walls reported in previous studies. This confirms the applicability of the macro model.