Enhancement of fatigue life of steel members by use of prestressed CFRP patches

Mohammad Reza Emdad, Riadh Saleh Hassan Al-Mahaidi, Xiao Ling Zhao

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


Due to the requirement of retrofitting and repair for a large number of structures worldwide, research has been directed to innovative techniques of rehabilitation utilizing new materials. One of the most important reasons for upgrading structures is to increase fatigue life in order to preserve and maintain the structure beyond its design life. Carbon fibre reinforced polymers (CFRPs) have been used extensively in civil engineering applications. Many researchers have shown the effectiveness of CFRP strengthening on concrete structures. The effect of CFRP strengthening of steel structures has also shown promising results for fatigue life enhancement. Research proves that this method has more advantages than the traditional methods of strengthening for slowing or stopping crack propagation.
Moreover, based on experiments performed by the authors, it has been concluded that various patch
configurations have different effects on the fatigue life of steel plates. One of the techniques of
strengthening utilizing CFRP patches is prestressing. This technique was introduced in the early days
when CFRP materials were introduced for applications in aeronautical, mechanical and structural
engineering. Unfortunately, little research has been performed in the area of strengthening steel
structures with prestressed CFRP patches. This paper reports on the effect of CFRP strengthening with
focus on prestressing CFRP patches. Results for prestressed-CFRP strengthened steel elements show a
considerable extension in the fatigue life of these members.
Original languageEnglish
Title of host publicationThe 7th International Conference on FRP Composites in Civil Engineering (CICE 2014)
Subtitle of host publicationVancouver, British Columbia, Canada, August 20-22, 2014 [proceedings]
EditorsRaafat El-Hacha
Place of PublicationCanada
PublisherInternational Institute for FRP in Construction
Number of pages6
ISBN (Print)9781771363082
Publication statusPublished - 2014
EventInternational Conference on FRP Composites in Civil Engineering (CICE) 2014 - University of British Columbia, Vancouver, Canada
Duration: 20 Aug 201422 Aug 2014
Conference number: 7th


ConferenceInternational Conference on FRP Composites in Civil Engineering (CICE) 2014
Abbreviated titleCICE 2014
Internet address

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