Abstract
This paper presents numerical simulation of the tension behaviour of reinforced concrete (RC) members strengthened with externally bonded carbon fiber sheets (CFS) by using two dimensional (2D) rigid body spring model (RBSM). A non-linear RC model strengthened with CFS with bond-slip relations to model the concrete, steel reinforcement interface and concrete, externally bonded CFS interface, and simple models for bond deterioration due to cracking was embedded in the RBSM code that was developed by the authors. Comparison between the RBSM prediction and experimental results shows good agreement. The CFS has shown significant change in the bond stress and average stress of steel reinforcing bar and concrete. In addition the CFS has reduced the crack spacing and gave good crack width control.
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