Analysis of Interfacial Debonding of RC Beams Strengthened with CFL |
| Journal |
Advanced Materials Research (Volumes 33 - 37) |
| Volume |
Advances in Fracture and Materials Behavior |
| Edited by |
Wei Yang, Mamtimin Geni, Tiejun Wang and Zhuo Zhuang |
| Pages |
47-54 |
| DOI |
10.4028/www.scientific.net/AMR.33-37.47 |
| Online since |
March, 2008 |
| Authors |
Jiang Dong Deng,
Pei Yan Huang,
Xin Yan Guo,
Jun Deng
|
| Keywords |
Carbon Fiber Laminate (CFL), Failure Mode, Fracture Mechanics, Interface, RC Beams |
| Abstract |
The interfacial bonding property between carbon fiber laminate (CFL) and concrete is a
key issue in the application of RC beams strengthened with CFL. In this paper, fracture mechanics
method is used to develop a calculation formula of stress intensity factor for the CFL-concrete
interfacial crack. In combination with a series of tests, the interfacial fracture toughness is discussed,
and the influencing factors and process of the intermediate crack-induced debonding (IC debonding)
are also analyzed. The tests results show that IC debonding is generally induced by the flexural or
flexural-shear cracks in the bottom of RC beams around the mid-span, and develop along the
interface towards the end of the beam. A method to determine IC debonding derived from theoretic
analysis and the tests results demonstrates that the interfacial failure can be effectively avoided by
limiting CFL strain in the range of the debonding strain. |
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