Shear Strengthening of RC Beams with Externally Bonded CFRP Sheets
Publication: Journal of Structural Engineering
Volume 127, Issue 4
Abstract
The technique of strengthening or repairing reinforced concrete (RC) structures with externally bonded steel plates or composite sheets has been successfully applied in civil engineering. The RC structure is often strengthened in flexure. This work studies the effect of the shear strengthening of RC beams on the stress distribution, initial cracks, crack propagation, and ultimate strength. Five types of beams with different strengthening carbon-fiber–reinforced plastic sheets are used. The experimental results show that it is not necessary to strengthen the entire concrete beam surface. The general and regional behaviors of concrete beams with bonded carbon-fiber–reinforced plastic sheets are studied with the help of strain gauges. The appearance of the first cracks and the crack propagation in the structure up to the failure is monitored and discussed for five different strengthened beams. In particular, for one of the strengthened RC beams, the failure mode and the failure mechanism are fully analyzed.
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Information & Authors
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Published In
Journal of Structural Engineering
Volume 127 • Issue 4 • April 2001
Pages: 374 - 380
History
Received: Mar 19, 1999
Published online: Apr 1, 2001
Published in print: Apr 2001
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