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

Akram Jawdhari, Nisal Peiris, Issam Harik

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-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 languageEnglish
Title of host publication10th International Conference on FRP Composites in Civil Engineering - Proceedings of CICE 2020/2021
EditorsAlper Ilki, Medine Ispir, Pinar Inci
Pages181-192
Number of pages12
DOIs
StatePublished - 2022
Event10th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering, CICE 2021 - Virtual, Online
Duration: Dec 8 2021Dec 10 2021

Publication series

NameLecture Notes in Civil Engineering
Volume198 LNCE
ISSN (Print)2366-2557
ISSN (Electronic)2366-2565

Conference

Conference10th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering, CICE 2021
CityVirtual, Online
Period12/8/2112/10/21

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

Fingerprint

Dive into the research topics of 'Evaluating the Bond Characteristics of Intermediate and Ultra-High Modulus CFRP Laminates Adhered to Steel'. Together they form a unique fingerprint.

Cite this