Influence of Patching on the Shear Failure of Reinforced Concrete Beam without Stirrup
Abstract
:1. Introduction
2. Materials and Methods
2.1. Materials
2.2. Beam Specimens
2.3. Testing Beam Specimens
2.4. Numerical Modelling
3. Results and Discussion
3.1. Load-Deflection Behaviour
3.2. Shear Cracking Failure
3.3. Stress Distribution in Concrete Beam
3.4. Reinforcement Strain
3.5. Shear Strength
4. Conclusions
- It causes the first diagonal crack appearing at a higher load compared to that of normal beam.
- The high tensile strength of UPR is beneficial to hamper the propagation of the diagonal cracks.
- It alters the stress distribution in such a way to cause the stresses in the span between support and UPR mortar decrease. On the other hand, the stresses in the span between UPR mortar and loading point increase.
- UPR mortar can increase the shear strength of the reinforced concrete beam about 15–20% at a variety of reinforcement ratios.
Author Contributions
Funding
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Beam ID | Type of Beam | Tensile Reinforcement | Compressive Reinforcement | Stirrup at Half Shear Span | Concrete Compressive Strength 1 | UPR Mortar Compressive Strength 1 |
---|---|---|---|---|---|---|
BN-19 | Normal | 2D19 | 2D8 | D6-150 | 23.80 MPa | - |
BR-19 | Repair | 2D19 | 2D8 | D6-150 | 23.80 MPa | 73.67 MPa |
BN-22 | Normal | 2D22 | 2D8 | D6-150 | 25.29 MPa | - |
BR-22 | Repair | 2D22 | 2D8 | D6-150 | 25.29 MPa | 73.67 MPa |
Material | Average Compressive Strength (Cylinder) (MPa) | Characteristic Compressive Strength (Cylinder) (MPa) | Characteristic Compressive Strength (Cube) (MPa) | Tensile Strength (MPa) | Yield Stress (MPa) | Elastic Modulus (MPa) | Material Model |
---|---|---|---|---|---|---|---|
Concrete (BN-19 & BR-19) | 23.80 | 15.80 | 18.59 | 1.66 | 24,350 | 3D nonlinear cementitious material 2 | |
Concrete (BN-22 & BR-22) | 25.29 | 17.29 | 20.34 | 1.78 | 25,640 | 3D nonlinear cementitious material 2 | |
UPR-mortar | 73.6 | 21.5 | 12,500 | 3D nonlinear cementitious material 2 | |||
Reinforcement D22 | 452 | 200,000 | Reinforcement-bilinear | ||||
Reinforcement D19 | 475 | 200,000 | Reinforcement-bilinear | ||||
Reinforcement D8 | 462 | 200,000 | Reinforcement-bilinear | ||||
Reinforcement D6 | 395 | 200,000 | Reinforcement-bilinear | ||||
Steel plate | 200,000 | 3D elastic isotropic | |||||
Horizontal support | 10,000 | Linear spring | |||||
Vertical support | Relative displacement −1, Stress 500,000 MPa Relative displacement +1, Stress 330–350 MPa | Nonlinear spring |
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Kristiawan, S.A.; Saifullah, H.A.; Supriyadi, A. Influence of Patching on the Shear Failure of Reinforced Concrete Beam without Stirrup. Infrastructures 2021, 6, 97. https://doi.org/10.3390/infrastructures6070097
Kristiawan SA, Saifullah HA, Supriyadi A. Influence of Patching on the Shear Failure of Reinforced Concrete Beam without Stirrup. Infrastructures. 2021; 6(7):97. https://doi.org/10.3390/infrastructures6070097
Chicago/Turabian StyleKristiawan, Stefanus Adi, Halwan Alfisa Saifullah, and Agus Supriyadi. 2021. "Influence of Patching on the Shear Failure of Reinforced Concrete Beam without Stirrup" Infrastructures 6, no. 7: 97. https://doi.org/10.3390/infrastructures6070097