Near-Crack Debonding in an FRP-Overlaid Steel Plate

B. T. Zheng, J. G. Teng

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

Adhesively bonded fiber-reinforced polymer (FRP) reinforcement has been experimentally proven to be effective in extending the fatigue life of cracked structural steel members. While the effectiveness of such repairs depends on the bond behavior between the FRP and the target steel member, debonding of the FRP near the crack from the steel substrate has been observed in most of the reported laboratory tests. Although this debonding is generally expected to reduce the effectiveness of the repair significantly, a method for the accurate assessment of the reduction effect has not been developed. This paper introduces an analytical model recently developed by the authors, which can accurately predict the effect of near-crack debonding on the stress intensity factor as well as other behavioral aspects, such as the crack opening displacement profile and the interfacial response. Numerical results obtained from the analytical model for two series of examples are presented in the paper, which demonstrate that near-crack debonding is not inevitable in the presence of an underlying crack, and, if it occurs, its effect may still be benign. These insights are radically different from the widely accepted understanding.

Original languageEnglish
Title of host publicationProceedings of the 6th International Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures
EditorsXiang-Lin Gu, Masoud Motavalli, Alper Ilki, Qian-Qian Yu
PublisherSpringer Science and Business Media Deutschland GmbH
Pages261-267
Number of pages7
ISBN (Print)9789819933617
DOIs
Publication statusPublished - 21 Jan 2024
Event6th International Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures, SMAR 2022 - Shanghai, China
Duration: 7 Sept 20219 Sept 2021

Publication series

NameLecture Notes in Civil Engineering
Volume259
ISSN (Print)2366-2557
ISSN (Electronic)2366-2565

Conference

Conference6th International Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures, SMAR 2022
Country/TerritoryChina
CityShanghai
Period7/09/219/09/21

Keywords

  • Analytical model
  • fatigue crack
  • FRP
  • Interfacial debonding
  • Strengthening

ASJC Scopus subject areas

  • Civil and Structural Engineering

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