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Fatigue testing of defected steel beams repaired using medium and high modulus CFRP strand sheets
conference contribution
posted on 2023-05-23, 08:07 authored by Jiao, H, Zhao, XL, Kobayashi, A, Wood, DCFRP sheets are extensively used to strengthen defected steel members through a wet layup process. Different techniques were used to control the quality of bonding, such as vacuum bags and rollers. However, air bubbles and excessive epoxy resin might still exist between CFRP layers, causing the reduction in bonding strength. To address this issue, strand CFRP sheets were recently applied in the strengthening of steel elements by some researchers. The advantage of strand CFRP sheets is that CFRP fibre was impregnated with resin to form hardened strands at factory conditions. As a result, the bonding quality during the wet layup can be improved. In this study, two types of strand CFRP sheets, with Young’s moduli of 430GPa and 690GPa, were applied on defected steel beams. Eight specimens were tested under four point bending. The failure modes and fatigue life of the specimens were compared with those of specimens strengthened with normal CFRP sheets and CFRP plates. Results showed that the fatigue life of defected steel beams strengthened with high and medium strand CFRP sheets is comparable to that of beams strengthened with CFRP plates and other high modulus CFRP sheets.
History
Publication title
Proceedings of the Fourth Asia-Pacific Conference on FRP in Structures (APFIS 2013)Editors
R Al-MahaidiPagination
1-6Department/School
School of EngineeringPublisher
International Institute for FRP in ConstructionPlace of publication
Ontario, CanadaEvent title
Fourth Asia-Pacific Conference on FRP in Structures (APFIS 2013)Event Venue
Melbourne, AustraliaDate of Event (Start Date)
2013-12-11Date of Event (End Date)
2013-12-13Rights statement
Copyright 2013 International Institute for FRP in ConstructionRepository Status
- Restricted