A study of full-field debond behavior of CFRP-reinforced concrete beams

Title: A study of full-field debond behavior of CFRP-reinforced concrete beams
Author(s): W L Lai, K K Lee, S C Kou, C S Poon, W.F. Tsang
Paper category : conference
Book title: International RILEM Conference on Advances in Construction Materials Through Science and Engineering
Editor(s): Christopher Leung and K.T. WAN
ISBN: 978-2-35158-116-2
e-ISBN: 978-2-35158-117-9
Publisher: RILEM Publications SARL
Publication year: 2011
Pages: 392 - 402
Total Pages: 11
Nb references: 15
Language: English

Abstract: The methodologies and results of a study on full-field debond behavior of CFRP-strengthened concrete beam composites under a quasi-static pull-off stress are presented. The methodologies used two approaches carried out simultaneously. The CFRP-strengthened concrete beam specimens were tested destructively with a modified pull-off test applied on the composites, and simultaneously tested with a nondestructive, full-field and non-contact infrared thermography method. The former pull-off stress (destructive test) ruptured the CFRP/concrete interface and initiated propagation of the rupture front from the loaded point. At specific displacement levels, the full-field temperature distributions (to represent and extent of rupture) over the surfaces were captured by an infrared thermo-imager. The extent of rupture, load level and displacement level were cross-plotted. The data showed an elastic-plastic failure model.
The elastic-plastic failure process started from an initial elastic (large load increment, small rupture) state to a plastic (small load increment, large rupture) state after passing a yield point.

Online publication: 2011-10-31
Publication type : full_text
Public price (Euros): 0.00