Bond Behavior of Auxetic Bars in Reinforced Concrete – A Numerical Study

Jesús Antonio García Sánchez; Carolina Quintero Ramirez; Paulo Cesar Gonçalves; Oscar Javier Begambre

doi:10.1590/1679-78257917

Bond Behavior of Auxetic Bars in Reinforced Concrete – A Numerical Study

Authors

Jesús Antonio García Sánchez Universidade Federal de Itajubá, Campus Prof. José Rodrigues Seabra – Sede, Av. BPS, 1303, Itajubá – MG, Brasil https://orcid.org/0000-0003-0806-1660
Carolina Quintero Ramirez Universidade Federal de Itajubá, Campus Prof. José Rodrigues Seabra – Sede, Av. BPS, 1303, Itajubá – MG, Brasil https://orcid.org/0000-0002-1993-2305
Paulo Cesar Gonçalves Universidade Federal de Itajubá, Campus Prof. José Rodrigues Seabra – Sede, Av. BPS, 1303, Itajubá – MG, Brasil https://orcid.org/0000-0001-7391-9972
Oscar Javier Begambre Universidad Industrial de Santander -UIS, Campus central, Bucaramanga, Colombia https://orcid.org/0000-0002-2895-9374

DOI:

https://doi.org/10.1590/1679-78257917

Abstract

The study aims to enhance the bonding strength in reinforced concrete using a novel Auxetic Tubular Deformed Rebar (ATDR). A high-resolution non-linear finite element model was developed to perform numerical analysis of pull-out tests (PoT). Two sets of numerical simulations were conducted: one to replicate the concrete behavior under compression and tension tests, and the other for PoT, validated with experimental and numerical data. Numerical tests utilized a microplane model with plasticity–damage, regularized by an implicit gradient. Auxetic geometry involves adding ellipsoidal orifices to the rebar surface. Comparing the behavior of ATDR with the conventional rebar, we observed an increase in the negative value of Poisson's ratio, resulting in higher normal and shear forces, enhancing adherence. This study presents the first comprehensive simulation of Auxetic Metamaterial Rebar in concrete, offering a promising approach to enhance bond strength. Further research, both numerical and experimental, is essential to assess Auxetic Reinforcement's mechanical behavior in diverse structural elements and load scenarios.

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Published

2024-03-01

Issue

Vol. 21 No. 3 (2024)

Section

Articles

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