Numerical simulation of CFRP strengthened steel plates with edge cracks

Qian Qian Yu, Xianglin Gu, Tao Chen, Xiao Ling Zhao

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

Abstract

Fatigue damage is a major concern for steel structures. Recently, bonding repair technique using carbon fibre reinforced polymer (CFRP) materials has demonstrated its potential for fatigue crack repair of steel members in comparison with traditional retrofitting methods. Extensive research has been carried out to investigate the improved fatigue behaviour of damaged steel elements repaired by CFRP materials. In terms of numerical simulation, limited attempts were performed to simulate the fatigue crack propagation process of defected steel members. This paper presented a boundary element analysis of CFRP strengthened steel plates with edge cracks. Three dimensional boundary element models were established based on the configuration of tested specimens in the literature. A through thickness crack was set at the edge of the steel plate to model the initial slot. Thereafter, the crack propagation was performed with NASGRO 3 law and strain energy density criterion. The numerical results matched well with the test data, including variables of initial crack length, bond configuration and number of bond layers. It was therefore concluded that the boundary element method was reliable to predict the fatigue crack growth life of edge cracked steel plates strengthened with CFRP laminates.
Original languageEnglish
Title of host publicationJoint Conference of the 12th International Symposium on Fiber Reinforced Polymers for Reinforced Concrete Structures (FRPRCS-12) & the 5th Asia-Pacific Conference on Fiber Reinforced Polymers in Structures (APFIS-2015)
EditorsZhishen Wu, Gang Wu, Xin Wang
Place of PublicationNanjing China
PublisherSoutheast University
Pages1 - 6
Number of pages6
Publication statusPublished - 2015
EventInternational Symposium on Fiber Reinforced Polymers for Reinforced Concrete Structures (FRPRCS) & the Asia-Pacific Conference on Fiber Reinforced Polymers in Structures (APFIS) - Nanjing, China
Duration: 14 Dec 201516 Dec 2015
http://www.iifc.org/proceedings/APFIS_2015/Content.pdf

Conference

ConferenceInternational Symposium on Fiber Reinforced Polymers for Reinforced Concrete Structures (FRPRCS) & the Asia-Pacific Conference on Fiber Reinforced Polymers in Structures (APFIS)
Abbreviated titleFRPRCS-12/APFIS-2015
CountryChina
CityNanjing
Period14/12/1516/12/15
OtherJoint Conference of the 12th International Symposium on Fiber Reinforced Polymers for Reinforced Concrete Structures (FRPRCS-12) & the 5th Asia-Pacific Conference on Fiber Reinforced Polymers in Structures (APFIS-2015)
Internet address

Keywords

  • Boundary element method
  • Carbon fibre reinforced polymer (CFRP)
  • Edge crack
  • Fatigue crack growth life
  • Steel plate

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