Macroscopic Evaluation on Shear Resisting Mechanism of Corroded Reinforced Concrete Beams
By Tomohiro Miki, Nobuo Suzuki and Junichiro Niwa
Concrete Research and Technology
Vol.19, No.3, Sep. 2008 (Issue 48)
- Synopsis:
- This paper presents an analytical study to evaluate the residual structural performance of RC members damaged due to steel corrosion. A lattice model is focused on and developed to evaluate the shear resisting mechanism of corroded RC beams, An interface element is modeled for the bond behavior between corroded reinforcement and concrete and incorporated into the lattice model. The analysis shows that the shear carrying capacity of the RC beams having sufficient anchorage reinforcement increases when the bond between the longitudinal reinforcement and concrete degrades as the steel corrosion proceeds. This behavior of the RC beams can be explained by means of the response of arch elements in the lattice model that represent the formation of the tied arch mechanism in the beam.
- Keywords:
- steel corrosion, lattice model, bond deterioration, shear resisting mechanism, failure mode, macroscopic mechanisms
