Abstract
The effectiveness of using an externally bonded carbon-fiber-reinforced polymer (EB-CFRP) system with mechanical end anchorage to retrofit severely shear-damaged reinforced concrete (RC) beams is examined in this paper. A total of 14 tests were performed on eight RC beams with a T-shaped section and low compressive strength. To represent a severe shear-damage condition, five beams were tested to failure, retrofitted, then retested to failure for a second time. Test parameters included the number of EB-CFRP layers and type of end anchorage system. The results demonstrated that retrofitting of severely shear-damaged RC T-beams with EB-CFRP composites and proper mechanical end anchorage can fully restore the original shear capacity of the beams. The use of a sandwich composite panel in combination with a threaded anchor rod inserted through the entire web width (thru-bolt) as an end anchorage system was more effective than using the panel with side powder-actuated fasteners. Increasing the number of EB-CFRP layers did not result in additional gain in shear capacity. The accuracy and validity of four different international guidelines/standards were examined by comparing their predictions with the experimental results.
Original language | English |
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Pages (from-to) | 693-704 |
Number of pages | 12 |
Journal | Journal of Composites for Construction |
Volume | 16 |
Issue number | 6 |
DOIs | |
Publication status | Published - Dec 1 2012 |
Keywords
- Concrete
- Externally bonded carbon-fiber-reinforced polymer (EB-CFRP)
- Fasteners
- Mechanical anchorage
- Retrofitting
- Shear
ASJC Scopus subject areas
- Ceramics and Composites
- Civil and Structural Engineering
- Building and Construction
- Mechanics of Materials
- Mechanical Engineering