Experimental Investigation on Effective Bond Length of Flexurally CFRP-Strengthened RC Beams Failed by Intermediate Crack Debonding

Abstract:

The models to calculate the effective bond length determined by single-lap or double-lap shear tests are more suitable for the end-debonding failure; and the improved models based on the simply shear test models to calculate the effective bond length of flexural CFRP-strengthened beams failed by intermediate crack debonding (IC debonding) are also lack of the support of experimental data. To investigate the effective bond length of flexural CFRP-strengthened beams, a total of 9 flexurally CFRP-strengthened beams were tested. The experimental results show that the existing models are very conservative for calculating the effective bond length in flexural FRP-strengthened RC beams failed by IC debonding. Based on the experimental results, this paper presents a model to calculate the effective bond length of flexural FRP-strengthened RC beams failed by IC debonding, and a model to calculate the plastic hinge length at the shear-flexure span.

• Periodical: Advanced Materials Research (Volumes 163-167)
• Pages: 977-980
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.163-167.977
• Online since: December 2010
• Authors: Gui Bing Li, Ai Hui Zhang, Wei Liang Jin
• Keywords: Debonding, Effective Bond Length, FRP-Strengthened, Intermediate Crack, Reinforced Concrete (RC) Beam

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