Studying the Effect of Nonlinear Modeling Methods of Shear Wall on the Behavior of Dual System under Lateral Loads

Abstract

Dual systems are crucial for resisting seismic loads, and their optimal design relies on the interaction between frames and walls. This paper studies the RC dual system using the advanced finite element program ABAQUS and the finite element program for structural analysis and design ETABS. Three models were used: the detailed model according to ABAQUS, based on the CDP (Concrete Damage Plasticity), and two models in the ETABS program, the fiber hinge model and the multi-layered shell element model. A five-story 2D building with dual systems was modeled and analyzed, with frames contributing 29% of the total shear force. The models were analyzed under lateral loads using nonlinear static analysis, and a capacity curve was drawn to compare plastic hinge locations and stresses values. The response modification factor for the optimal model was calculated and compared with code values. The results showed that the multi-layer shell element model effectively represents the nonlinear behavior of shear walls and dual systems, but it also has a brevity and cost-effectiveness, especially for 3D buildings.