%P 355-364
%T Fatigue behaviour of CFRP concrete joints under shear
%I ICE Publishing Ltd
%A L. Mahmoud
%A N. Shafiq
%A M.F. Nureldin
%A A.M.W. Thanoon
%V 162
%O cited By 3
%J Proceedings of the Institution of Civil Engineers: Structures and Buildings
%L scholars694
%D 2009
%N 5
%R 10.1680/stbu.2009.162.5.355
%K Carbon fiber reinforced plastics; Carbon fibers; Fatigue of materials; Fiber reinforced plastics; Materials testing; Reinforced concrete; Shear stress; Stress analysis, Carbon fibre reinforced polymer; Concrete interface; Cyclic shear loading; Experimental set up; Fatigue behaviour; Mathematical formulation; Strength and testing of materials; Structural concretes, Stiffness, carbon; concrete structure; cyclic loading; fatigue; polymer; reinforced concrete; shear strength; shear stress; stiffness; stress analysis
%X This paper proposes a new methodology for determining stiffness and degradation of stiffness at the interface between externally bonded carbon-fibre-reinforced polymer (CFRP) and structural concrete under cyclic shear loading. In this paper an experimental programme consisting of 14 push-off specimens has been conducted. The CFRP composite strips were used to strengthen concrete externally at a known failure plane to resist shear stresses in shear friction. The test set-up and supports were designed such that there is a direct shear at the CFRP-to-concrete interface. This paper describes the experimental set-up and test parameters. Experimental results for cyclic bond stress-slip behaviour, mathematical formulations for stiffness of interface and its degradation as the number of cycles increased have been obtained and discussed.