EXPERIMENTAL INVESTIGATION OF THE FLEXURAL AND SHEAR CAPACITIES OF REINFORCED CONCRETE BEAMS ENHANCED WITH CARBON FIBRE REINFORCED POLYMER (CFRP) LAMINATES
EXPERIMENTAL INVESTIGATION OF THE FLEXURAL AND SHEAR CAPACITIES OF REINFORCED CONCRETE BEAMS ENHANCED WITH CARBON FIBRE REINFORCED POLYMER (CFRP) LAMINATES
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Date
2021-03
Authors
YUSUF, Nurudeen
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Abstract
In this research, experimental research was carried out to assess the flexural and shear capacities
of RC beams strengthened with different amount of carbon fibre reinforced polymer laminates at
the tension face and U-strips. Twelve rectangular RC beams of cross-sectional dimension
150x150x750mm were cast and three were un-strengthened and used as reference beams and the
remaining nine were strengthened with different amount of CFRP varying from single to triple
layers and all were tested to failure under three point bending test. The increase of ultimate
strength provided by the bonded CFRP laminates was assessed and failure modes identified and
compared to the un-strengthened RC beams. The results indicated that the flexural capacity of
the beams were significantly improved as the amount of the laminates increases. The increment
ranges from 20% to 52% for single to triple layers laminates and also the shear capacity of the
strengthened beam increased as compared to the un-strengthened beams. The experimental
CFRP shear strength contribution were also compared with the predicted resultsand the results
obtained closely agreed with the experimental results. It was concluded that the attachment of
CFRP laminates has substantial influence on the performance improvement of CFRP
strengthened RC beams in both shear and flexure but this increase is accompanied with the
reduction in ductility due to the restraining effect offered by the CFRP material to the concrete surface.
Description
A DISSERTATION SUBMITTED TO THE SCHOOL OF POSTGRADUATE STUDIES,
AHMADU BELLO UNIVERSITY, ZARIA
IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE AWARD
OF MASTER OF SCIENCE IN CIVIL ENGINEERING
DEPARTMENT OF CIVIL ENGINEERING,
FACULTY OF ENGINEERING,
AHMADU BELLO UNIVERSITY,
ZARIA, NIGERIA
Keywords
EXPERIMENTAL INVESTIGATION,, FLEXURAL,, SHEAR CAPACITIES,, REINFORCED CONCRETE BEAMS ENHANCED,, CARBON FIBRE REINFORCED POLYMER,, LAMINATES.