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Influence of FRP width-to-spacing ratio on bond performance of externally bonded FRP systems on one way concrete slabs

Ramanathan, Karthik Narayan (2008) Influence of FRP width-to-spacing ratio on bond performance of externally bonded FRP systems on one way concrete slabs. Master's Thesis, University of Pittsburgh. (Unpublished)

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Abstract

Debonding of externally bonded fiber reinforced polymer (FRP) composite materials used for repair of reinforced concrete elements is commonly observed and is often the critical limit state for such systems. The FRP geometry, as quantified by the ratio of FRP width-to-substrate width, bf/b, (or FRP width-to-FRP spacing, bf/s, for slabs) is expected to affect the ultimate bond performance. Factors accounting for this effect are included in many design guides. An experimental program using concrete slab specimens having identical reinforcement ratios, strengthened with CFRP strips having different bf/s ratios is reported. The focus of the study is the strain in the CFRP and its eventual debonding. Thinner (lower bf/s) CFRP strip are observed to have greater strains at a given load level and to have a higher strain at debonding. The effect of the transverse strain gradient in the CFRP - the CFRP "edge effect" - is also investigated.

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Details

Item Type: University of Pittsburgh ETD
Status: Unpublished
Creators/Authors:
CreatorsEmailPitt UsernameORCID
Ramanathan, Karthik Narayankar81@pitt.edu, karthikthegr8@gmail.comKAR81
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Committee ChairHarries, Kent A.kharries@pitt.eduKHARRIES
Committee MemberOyler, John F.oyler@engr.pitt.eduOYLER1
Committee MemberRizzo, Piervincenzopir3@pitt.eduPIR3
Date: 9 June 2008
Date Type: Completion
Defense Date: 15 February 2008
Approval Date: 9 June 2008
Submission Date: 19 February 2008
Access Restriction: No restriction; Release the ETD for access worldwide immediately.
Institution: University of Pittsburgh
Schools and Programs: Swanson School of Engineering > Civil and Environmental Engineering
Degree: MSCE - Master of Science in Civil Engineering
Thesis Type: Master's Thesis
Refereed: Yes
Uncontrolled Keywords: CFRP systems; one way concrete slabs; shear lag effects; transverse stress distribution
Other ID: http://etd.library.pitt.edu/ETD/available/etd-02192008-155540/, etd-02192008-155540
Date Deposited: 10 Nov 2011 19:31
Last Modified: 15 Nov 2016 13:36
URI: http://d-scholarship.pitt.edu/id/eprint/6377

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