Large Panel Reinforced Concrete Buildings Inelastic Behavior Modeling Approach for Nonlinear Seismic Analysis

This paper presents an in-depth investigation into the inelastic behavior of large panel reinforced concrete buildings, with a focus on developing an accurate modeling approach for nonlinear seismic analysis. The study begins by discussing the modeling assumptions used in the analysis, considering various factors such as material properties and stress distribution along the connection region. To implement the proposed modeling approach, the finite element method is adopted, utilizing the LIRA SAPR software. Nonlinear behavior of the connection region is modeled by a combination of two finite elements: (i) shell elements representing stress distribution in the connection region and (ii) 2-mode link element for modeling shear keys. The paper provides a detailed explanation of the finite element implementation process, highlighting the necessary calculations for stiffness determination for each structural element. The validity and performance of the proposed approach are assessed through both static and dynamic verifications. Overall, this research contributes to the field of structural engineering by offering an improved approach to capture the inelastic behavior of large panel reinforced concrete buildings during seismic events.