Nonlinear inelastic simulation of high-rise buildings with innovative composite coupling shear walls and CFST columns

Abstract

This paper investigates the behavior of high-rise composite buildings with composite shear walls and concrete-filled steel tubular (CFST) columns using a numerical model in OpenSees. In the model, the geometric and material nonlinearity of structural elements are captured by utilizing a fiber force-based beam-column elements with rigorously modified material stress–strain relationships. Besides, the confining effect of the concrete core, the semi-rigid connections, and the coupling effect of composite shear walls is carefully taken into consideration. Finally, the case study of a 42-storey composite building is conducted using the proposed model to provide a thorough understanding about the ..