Análise numérica do comportamento de conectores com cabeça embutidos em concreto armado via método dos elementos finitos

Abstract

This work presents a numerical analysis of the behavior of anchorage devices of the headed stud type in reinforced concrete elements. For this, a three-dimensional nonlinear model was developed. The numerical modeling was carried out using the 2017 version of the SIMULIA ABAQUS software, through the application of the finite element method (FEM) and based on the experimental data obtained by Lima (2024) for the validation of the numerical model. For the concrete modeling, the Concrete Damage Plasticity (CDP) constitutive model was adopted. For the headed stud, the elastoplastic model was used. To simulate the interaction between the two materials, the embedded function present in the software was applied. Based on the results obtained, it was possible to evaluate the model's behavior concerning deformations in the stud inside and outside the concrete, as well as through the analysis of the load-slip curve. Thus, it enables the comparison with the experiment conducted by Lima (2024), which contributes to the validation of the proposed model. Furthermore, the model enabled the analysis of damaged regions, rupture angle, and cracking patterns due to tensile forces in the concrete through the damage variable (DAMAGET). Finally, it was observed that the model showed good accuracy with Lima's (2024) experimental results and a failure mode consistent with the analyzed literature.