Comparative analysis of inelastic behavior of RC beam using applied element method and finite element method

Investigating the inelastic behavior of entire buildings and their structural elements under hazard-induced forces is crucial. The Applied Element Method (AEM) is a simulation-based analysis technique capable of modeling performance from initial loading to eventual failure. This paper presents a comparative analysis of AEM and the Finite Element Method (FEM) in simulating the inelastic performance of a reinforced concrete beam, with results validated against experimental data. The structural analysis was performed using two different numerical methods: The AEM, implemented in the Extreme Loading for Structures (ELS) software, and the FEM, implemented in ABAQUS. The comparison showed that both numerical models closely matched the observed overall structural response, especially in the elastic phase. Additionally, both methods accurately captured the failure mode, load-deflection behavior, and crack pattern development under 6 % error, based on the experimental data. While both methods reasonably predicted the elastic moment, FEM estimated a higher plastic moment capacity. The findings indicate that both AEM and FEM are effective in tracking the linear and nonlinear inelastic performance of the RC beams, supporting safe, durable, and cost-effective building designs.