Keenan, Patrick
(2013)
Investigation of the Behavior of External CFRP-to-Internal Reinforcing Bar Splices.
Master's Thesis, University of Pittsburgh.
(Unpublished)
Abstract
The reported study investigates the feasibility and behavior of CFRP-to-reinforcing steel splices in medium-scale reinforced concrete beams. Six reinforced concrete beams were cast. The dimensions of the beams tested were 8 x 6 x 84 in. (203 x 152 x 2134 mm), reinforced with a single #4 bar (12.7 mm) as primary flexural reinforcement. Control specimens having a continuous bar and a conventional 18 in. (457 mm) contact lap splice serve to define the ‘target capacity’ for the CFRP-to-reinforcing steel splices. For the CFRP-to-reinforcing steel spliced beams, the reinforcing bar is terminated near midspan. A CFRP strip, designed to have a capacity equal to or greater than the bar is applied, lapped with the terminated bar and developed to the unreinforced end of the beam. The beams are tested in flexure under monotonically increasing loads to failure. Thus, after cracking, the beam capacity is entirely dependent on the force redistribution between the reinforcing steel in one half of the span and the CFRP strip in the other. This transfer occurs over the provided splice. Conventional lap splices between steel reinforcement are designed to provide enough development length to yield the bars. Therefore yielding of the primary reinforcing steel in the test specimens is an indication that the CFRP-to-reinforcing steel lap splice has sufficiently reached its design capacity. The test beams that were designed to have sufficient development lengths displayed the ability to yield the reinforcing steel; an indication that CFRP-to-reinforcing steel lap splices are a viable option. The test beams that were designed to have insufficient development length failed prior to the steel yielding. This was the anticipated result, since the purpose of these beams was to investigate the behavior and probable failure modes of under-designed CFRP-to-reinforcing steel splices.
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Details
| Item Type: |
University of Pittsburgh ETD
|
| Status: |
Unpublished |
| Creators/Authors: |
|
| ETD Committee: |
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| Date: |
27 June 2013 |
| Date Type: |
Publication |
| Defense Date: |
28 April 2013 |
| Approval Date: |
27 June 2013 |
| Submission Date: |
1 April 2013 |
| Access Restriction: |
No restriction; Release the ETD for access worldwide immediately. |
| Number of Pages: |
84 |
| Institution: |
University of Pittsburgh |
| Schools and Programs: |
Swanson School of Engineering > Civil and Environmental Engineering |
| Degree: |
MS - Master of Science |
| Thesis Type: |
Master's Thesis |
| Refereed: |
Yes |
| Uncontrolled Keywords: |
Reinforced Concrete, CFRP, Lap Splice, Developement Length |
| Date Deposited: |
27 Jun 2013 14:28 |
| Last Modified: |
15 Nov 2016 14:11 |
| URI: |
http://d-scholarship.pitt.edu/id/eprint/18023 |
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