Experimental Research of Effect on Carrying Capacity of Normal Section of CFRP-Strengthened Beams for CFRP Debonding

Abstract:

By the experiment of 13 RC beam strengthened with CFRP, the paper mainly study the effect on the load carrying capacity of normal section of CFRP-strengthened beams for CFRP debonding. The results show that for the strengthened beams without any anchorage at plate-end, they lost load carrying capacity soon after CFRP debonded and quitted working, or went on carrying load like an ordinary RC beam. Besides, the formula for the effective CFRP strain when CFRP end debonded was proposed. For the strengthened beams with sufficient anchorage at plate-end, the strengthened beams should be simplified as simply supported unbonded concrete member after CFRP debonded. A reduction factor was adopted to modify the ultimate tension strain derived from the planar section assumption. The calculated results of ultimate carrying capacity were in reasonable agreement between the suggested formula and the test results.

• Periodical: Applied Mechanics and Materials (Volumes 193-194)
• Pages: 1192-1196
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.193-194.1192
• Online since: August 2012
• Authors: Ze Jun Liu, Hai Ping Meng
• Keywords: Bending Member, Carbon Fiber Reinforced Polymer/Plastic (CFRP), Carrying Capacity, Debonding

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