PSI - Issue 37

Available online at www.sciencedirect.com Structural Integrity Procedia 00 (2019) 000 – 000 Available online at www.sciencedirect.com ScienceDirect

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Procedia Structural Integrity 37 (2022) 321–329

ICSI 2021 The 4th International Conference on Structural Integrity NLFEA based design optimization of GFRP strips in partially confined concrete

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Sonia Djenad a, *, Souad Ait Taleb b , Abelmadjid Si Salem a and M. Amin Bouzidi a

a Laboratory of Construction Engineering and Architecture (LGCA), Faculty of Technology, University of Bejaia, 06000 Bejaia, Algeria b Civil Engineering Department, University Mouloud Mammeri of Tizi Ouzou, 15000, Algeria

© 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of Pedro Miguel Guimaraes Pires Moreira Abstract The present study aims to introduce a nonlinear finite element approach (NLFEA) carried out on repaired concrete members under axially compressive loading. The main objective is to assess the effect of design parameters of FRP stirrups based on various confinement rate. The constitutive materials were modeled according to numerical models embedded in ABAQUS software namely: Concrete Damaged Plasticity model to take into account the nonlinear behavior of compressive and strained concrete, coupled with damage theory to represent the cracks evolution. An orthotropic-elastic model to predict FRP behavior with Tsai-Wu failure criteria is used. Indeed, the proposed approach is validated by experimental models available in the literature. In conclusion, the predicted numerical results for various design of FRP stirrups and damage configurations highlight the promising of used FRP composites in the repair of concrete members in terms of mechanical performances enhancement. © 2022 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) This is an open access article under the CC BY

Peer-review under responsibility of Pedro Miguel Guimaraes Pires Moreira Keywords: FRP Stirrups ; Confined concrete ; Damages; NLFE-Analysis, Optimization

1. Introduction The use of composite materials in civil engineering field has made an effective progress, since they have attractive performances/ecological ratio compared to traditional ones. Due to their reduced own weight, currently, these innovative materials are widely used in concrete members to improve mechanical performances.

* Corresponding author. Tel.: +213-762-700-650; +213-665-738-841. E-mail address: abdelmadjid.sisalem@univ-bejaia.dz ; sonia.djenad@univ-bejaia.dz

2452-3216 © 2022 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of Pedro Miguel Guimaraes Pires Moreira

2452-3216 © 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of Pedro Miguel Guimaraes Pires Moreira 10.1016/j.prostr.2022.01.091