Estudio numérico computacional discreto del fenómeno de adherencia entre una matriz cementante y varillas corrugadas de acero: un acercamiento desde la meso-escala

Abstract

The purpose of this project is to develop a discrete computational numerical model that better approximate the mechanical response of reinforced concrete by: (1) an assembly of polydisperse spherical particles (aggregate), represented on the basis of a discrete model, which interact with each other low contact potentials (Hertz), friction (Coulomb-friction-law), (2) Cement matrix represented by a cohesion model (Johnson-Kendall-Roberts Model), and (3) corrugated bars represented by a solid interface (reinforced bar) that reproduces true corrugated geometry and interacts with particles (aggregates) through contact and cohesion potentials to define the matrix-reinforcement interaction, all based on fundamental concepts of the Discrete Element Method technology.The discrete element technology is implemented by LIGGGHTS, which is the software that was used to perform the modeling and simulations process. Another aspect that should be considered is the Hertz contact model and the Johnson Kendall Roberts cohesive model, which are used by the LIGGGHTS software.This model has the potential to generate a better understanding of the physics that governs the phenomenon of adhesion (concrete-reinforcement) because it allows to explore how the interaction forces between matrix and reinforced bars are distributed along the bar as a result of this phenomenon.