Evaluating the Bond Characteristics of Intermediate and Ultra-High Modulus CFRP Laminates Adhered to Steel

Akram Jawdhari; Abheetha Peiris; Issam Harik

doi:10.1007/978-3-030-88166-5_14

Evaluating the Bond Characteristics of Intermediate and Ultra-High Modulus CFRP Laminates Adhered to Steel

Akram Jawdhari, Abheetha Peiris, Issam Harik

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

Externally bonding Carbon Fiber Reinforced Polymer (CFRP) to steel, as a means of increasing the load carrying capacity of steel and concrete-steel composite beams, has become popular over the last couple of decades. When compared with traditional Intermediate Modulus (IM) CFRP, and due to the elastic modulus being higher than that of steel, high modulus (HM) and ultra-high modulus (UHM) CFRP laminates provide substantial load transfer in steel beams prior to yielding of steel. Several studies have been conducted on the bond between steel and CFRP, addressing the different failure mechanisms. Several bond-slip relations have been proposed, primarily for IM CFRP, based on cohesive failure within the bonding epoxy adhesive. This study aims to develop bond-slip models for both IM and UHM CFRP laminates bonded to steel, focusing on failure due to debonding at the steel-adhesive interface. Double lap shear tests were carried out using both IM and UHM CFRP laminates and the behavior of the specimens are compared with the finite element model results based on the developed bond-slip models. The double-lap shear joint stiffness was found to be higher for the UHM CFRP-steel bond, while the interfacial fracture energy was found to be higher for the IM CFRP-steel bond.

Original language	English
Title of host publication	10th International Conference on FRP Composites in Civil Engineering - Proceedings of CICE 2020/2021
Editors	Alper Ilki, Medine Ispir, Pinar Inci
Pages	181-192
Number of pages	12
DOIs	https://doi.org/10.1007/978-3-030-88166-5_14
State	Published - 2022
Event	10th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering, CICE 2021 - Virtual, Online Duration: Dec 8 2021 → Dec 10 2021

Publication series

Name	Lecture Notes in Civil Engineering
Volume	198 LNCE
ISSN (Print)	2366-2557
ISSN (Electronic)	2366-2565

Conference

Conference	10th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering, CICE 2021
City	Virtual, Online
Period	12/8/21 → 12/10/21

Bibliographical note

Publisher Copyright:
© 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.

Keywords

Bond-slip relation
CFRP strips
Double-lap shear joint
Finite element
Ultra-high modulus

ASJC Scopus subject areas

Civil and Structural Engineering

Access to Document

10.1007/978-3-030-88166-5_14

Cite this

Jawdhari, A., Peiris, A., & Harik, I. (2022). Evaluating the Bond Characteristics of Intermediate and Ultra-High Modulus CFRP Laminates Adhered to Steel. In A. Ilki, M. Ispir, & P. Inci (Eds.), 10th International Conference on FRP Composites in Civil Engineering - Proceedings of CICE 2020/2021 (pp. 181-192). (Lecture Notes in Civil Engineering; Vol. 198 LNCE). https://doi.org/10.1007/978-3-030-88166-5_14

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author = "Akram Jawdhari and Abheetha Peiris and Issam Harik",

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Jawdhari, A, Peiris, A & Harik, I 2022, Evaluating the Bond Characteristics of Intermediate and Ultra-High Modulus CFRP Laminates Adhered to Steel. in A Ilki, M Ispir & P Inci (eds), 10th International Conference on FRP Composites in Civil Engineering - Proceedings of CICE 2020/2021. Lecture Notes in Civil Engineering, vol. 198 LNCE, pp. 181-192, 10th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering, CICE 2021, Virtual, Online, 12/8/21. https://doi.org/10.1007/978-3-030-88166-5_14

Evaluating the Bond Characteristics of Intermediate and Ultra-High Modulus CFRP Laminates Adhered to Steel. / Jawdhari, Akram; Peiris, Abheetha ; Harik, Issam.
10th International Conference on FRP Composites in Civil Engineering - Proceedings of CICE 2020/2021. ed. / Alper Ilki; Medine Ispir; Pinar Inci. 2022. p. 181-192 (Lecture Notes in Civil Engineering; Vol. 198 LNCE).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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AB - Externally bonding Carbon Fiber Reinforced Polymer (CFRP) to steel, as a means of increasing the load carrying capacity of steel and concrete-steel composite beams, has become popular over the last couple of decades. When compared with traditional Intermediate Modulus (IM) CFRP, and due to the elastic modulus being higher than that of steel, high modulus (HM) and ultra-high modulus (UHM) CFRP laminates provide substantial load transfer in steel beams prior to yielding of steel. Several studies have been conducted on the bond between steel and CFRP, addressing the different failure mechanisms. Several bond-slip relations have been proposed, primarily for IM CFRP, based on cohesive failure within the bonding epoxy adhesive. This study aims to develop bond-slip models for both IM and UHM CFRP laminates bonded to steel, focusing on failure due to debonding at the steel-adhesive interface. Double lap shear tests were carried out using both IM and UHM CFRP laminates and the behavior of the specimens are compared with the finite element model results based on the developed bond-slip models. The double-lap shear joint stiffness was found to be higher for the UHM CFRP-steel bond, while the interfacial fracture energy was found to be higher for the IM CFRP-steel bond.

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Evaluating the Bond Characteristics of Intermediate and Ultra-High Modulus CFRP Laminates Adhered to Steel

Abstract

Publication series

Conference

Bibliographical note

Keywords

ASJC Scopus subject areas

Access to Document

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