Meso-scale simulation of the post-cracking behavior of hybrid industrial/recycled steel fiber-reinforced concrete
| Main Authors: | Caggiano, Antonio, Said Schicchi, Diego, Martinelli, Enzo, Etse, Guillermo |
|---|---|
| Format: | Proceeding |
| Terbitan: |
, 2016
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| Online Access: |
https://zenodo.org/record/3497344 |
Daftar Isi:
- This paper aims at investigating the mechanical behavior of concrete reinforced with Recycled Steel Fibers (RSFs) recovered from waste tires. The results of an experimental activity carried out on Fiber-Reinforced Concretes (FRCs), obtained by mixing Industrial Steel Fibers (ISFs) and RSFs are briefly presented. After this, the paper focuses on the formulation of a numerical model capable to simulate the stress-crack opening displacement of FRC. Particularly, FRC is assumed as a multi-phase material, where the nonlinear material behavior of the concrete matrix is modelled by means of a discrete-crack approach for meso-scale analysis. ISFs and RSFs are assumed as embedded short beams randomly distributed within the meso-scale matrix. The internal forces in the steel fibers are obtained from both the bond-slip and dowel actions reproduced by fiber effects crossing cracks. Comparisons between experimental results and numerical predictions are discussed and analyzed. 1