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Strengthening of circular hollow steel tubular sections using high modulus CFRP sheets |
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| Affiliation: | 1. Department of Civil Engineering, Monash University, Clayton, Vic. 3800, Australia;2. North Carolina State University, Raleigh, NC, USA;1. School of Civil and Environmental Engineering, The University of Adelaide, Australia;2. School of Engineering and Electronics, Institute for Intrastructure and Environment, Edinburgh University, Alexander Graham Bell Building, The King’s Buildings, Edinburgh EH9 3JN, UK;3. School of Engineering – Civil Engineering, Surrey University, UK |
| Abstract: | This paper describes the behaviour of very high strength (VHS) circular steel tubes strengthened by carbon fibre reinforced polymer (CFRP) and subjected to axial tension. A series of tests were conducted with different bond lengths and number of layers. The distribution of strain through the thickness of CFRP layers and along the CFRP bond length was studied. The strain was found to generally decrease along the CFRP bond length far from the joint. The strain through the thickness of the CFRP layers was also found to decrease from the bottom to top layer. The effective bond length for high modulus CFRP was established. Finally empirical models were developed to estimate the maximum load for a given CFRP arrangement. |
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