Abstract
This study presents an analysis of carbon fiber reinforced polymers (CFRP)-to-parent material interfaces based on 40 single-lap shear tests intended to highlight the strength of the interfaces under fracture mode II. Three different substrates are analyzed: timber; concrete, and steel, using the same CFRP laminates and adhesive agent. The externally bonded reinforcement (EBR) technique was used throughout the study. The results show that the CFRP-to-timber interfaces had the highest strength but also showed that these interfaces need a longer bonded length in order to reach maximum strength, i.e., CFRP-to-timber interfaces had the longest effective bond length. The local nonlinear bond-slip curve of CFRP-to-concrete can be approximated to exponential curves, whereas the CFRP-to-timber or steel interfaces showed trilinear and bilinear bond-slip relations, respectively. Also, the CFRP-to-timber interfaces revealed the highest fracture energy. (C) 2015 American Society of Civil Engineers.
Original language | English |
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Article number | 04015070 |
Number of pages | 15 |
Journal | Journal of composites for construction |
Volume | 20 |
Issue number | 3 |
DOIs | |
Publication status | Published - Jun 2016 |
Keywords
- Carbon fiber reinforced polymers (CFRP)
- Bond-slip
- Concrete
- Steel
- Timber
- Debonding
- Mechanical testing
- TO-CONCRETE INTERFACES
- MATERIAL BONDED JOINTS
- NUMERICAL-ANALYSIS
- ANCHORAGE SYSTEMS
- SLIP MODELS
- SHEAR TESTS
- FRP
- BEHAVIOR
- DELAMINATION
- FRACTURE