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In this paper, a total of eight medium-scale RC beams with the dimensions of 150x200x1100 mm were fabricated without shear reinforcements. These beams were subjected to an accelerated corrosion test and then to a four-point loading shear test. The key test variables were various degrees of corrosion introduced in the tension reinforcements (0 %, 3.13 %, 4.11 %, and 4.93 % by mass loss). Even though all tested beams collapsed in shear failure, corroded beams exposed to 3 % and 4 % corrosion degrees showed a clear upward trend of approximately 7 % of maximum capacity compared to control beams. In contrast, corroded beams having a 5 % corrosion degree showed a 10 % decrease in shear strength with distinguished cracking patterns and load-carrying mechanism because of the significant loss of bond strength due to corrosion. Furthermore, a finite element model (FEM) for the prediction of structural performance in tested beams was produced using DIANA software. This model was verified by the experimental results (e.g. load-deflection curves, cracking patterns) with good agreement. Lastly, the parametric study of different shear span-to-depth ratios was also conducted to examine the FEM capability in simulating different behavior associated with beam and tie-arched mechanisms.
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Table of Contents
- Structural performance of corroded RC beams without shear reinforcement
- 1. Introduction
- 2. Methods
- 2.1. Experimental method
- 2.2. Finite element modeling method
- 3. Results and Discussion
- 3.1. Experimental results of shear behavior
- 3.2. FEM results of shear behavior
- 3.3. Parametric study
- 4. Conclusions
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