Uniaxial Tension Behavior of Reinforced Concrete Members Strengthened with Carbon Fiber Sheets
Publication: Journal of Composites for Construction
Volume 15, Issue 2
Abstract
A two-dimensional (2D) nonlinear numerical analysis code by using the rigid body spring method (RBSM) was developed by the writers at Hokkaido University to simulate the behavior of reinforced concrete (RC) members strengthened with fiber-reinforced polymer (FRP) sheets. The code supports the nonlinear constitutive laws for the different materials and nonlinear bond stress-slip relationships for steel-concrete and FRP sheet-concrete interfaces. This study uses the aforementioned code to examine the uniaxial tension behavior of RC members strengthened with carbon fiber sheets (CFS). Experimental results are compared with relevant numerical outputs to validate the model and confirm its ability to simulate the experimental observations. This study also assesses the influence of the amount of CFS strengthening on the tension-stiffening behavior of strengthened members. Finally, this research also suggests new analytical expressions for the average stress-strain relationships of concrete and steel in tension in the presence of stiffening contributions from internal steel reinforcement bars and externally bonded CFS reinforcement.
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Information
Published In
Journal of Composites for Construction
Volume 15 • Issue 2 • April 2011
Pages: 215 - 228
Copyright
© 2011 American Society of Civil Engineers.
History
Received: Nov 13, 2009
Accepted: Sep 8, 2010
Published online: Mar 15, 2011
Published in print: Apr 1, 2011
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