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ACOUSTIC EMISSION MONITORING OF REINFORCED CONCRETE SYSTEMS RETROFITTED WITH CFRP

Degala, Sandeep (2008) ACOUSTIC EMISSION MONITORING OF REINFORCED CONCRETE SYSTEMS RETROFITTED WITH CFRP. Master's Thesis, University of Pittsburgh. (Unpublished)

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Abstract

Debonding of externally bonded carbon fiber reinforced polymer (CFRP) materials used for repair of reinforced elements is commonly observed and is often the critical limit state for such systems. This thesis presents an acoustic emission (AE) study performed during laboratory tests of concrete slab specimens strengthened with CFRP strips. Several specimens having different CFRP details were monitored. An AE paradigm to monitor damage initiation, progression, and location in the test specimens is demonstrated. An algorithm to classify the cracks in concrete, the disbond of the CFRP strips from the soffit of the slab, and the eventual failure (debonding or concrete shear) is also presented. The proposed general approach can be applied to large scale CFRP-concrete systems. This thesis also presents an AE study carried out to characterize the loading to failure response of steel reinforcing bars of three different sizes (#4, #5, and #6) subjected to quasi-static tensile load.

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Details

Item Type: University of Pittsburgh ETD
Status: Unpublished
Creators/Authors:
CreatorsEmailPitt UsernameORCID
Degala, Sandeepsad40@pitt.edu, sandy16jun@gmail.comSAD40
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Committee ChairRizzo, Piervincenzopir3@pitt.eduPIR3
Committee MemberVandenbossche, Julie Mjmv7@pitt.eduJMV7
Committee MemberHarries, Kent Akharries@pitt.eduKHARRIES
Date: 9 June 2008
Date Type: Completion
Defense Date: 24 March 2008
Approval Date: 9 June 2008
Submission Date: 26 March 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; concrete slabs; intensity analysis; parameter analysis; steel reinforcing bar
Other ID: http://etd.library.pitt.edu/ETD/available/etd-03262008-191006/, etd-03262008-191006
Date Deposited: 10 Nov 2011 19:33
Last Modified: 15 Nov 2016 13:37
URI: http://d-scholarship.pitt.edu/id/eprint/6594

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