Enhanced Ultimate Shear Capacity of Concave Square Frustum-Shaped Wet Joint in Precast Steel–Concrete Composite Bridges
Abstract
:1. Introduction
2. Experimental Program
2.1. Specimen Details
2.2. Compression and Splitting Tests of Concrete Cubes
2.3. Tests of S-SWJ and S-CWJ
3. Nonlinear FE Analysis
3.1. General Description
3.2. Constitutive Model of Concrete
3.2.1. Uniaxial Compressive Stress–Strain Curve
3.2.2. Uniaxial Tensile Stress–Strain Curve
3.3. Constitutive Model of Steel Bars
3.4. Concrete–Concrete Interface Behavior
3.5. Validation of FE Model
4. Results and Discussion
4.1. Failure Modes
4.2. Influence of Concrete Strength
4.3. Influence of Shear Key Angle
5. Conclusions
- (1)
- It was found that the ultimate shear capacity of S-SWJ was 73.2% higher than that of S-CWJ, which was caused by changing the wet joint into a concave square frustum shape. This indicates that the shear resistance of wet joints can be significantly influenced by their shape.
- (2)
- The ultimate shear capacity of S-SWJ increases almost linearly with increasing concrete strength, while it first increases quickly and then decreases slowly with increasing shear key angle. The recommended shear key angle range is 45° to 55° because higher ultimate shear capacity can be achieved within this range.
- (3)
- In terms of improving the ultimate shear capacity of S-SWJ, increasing the concrete strength is more effective compared with changing the shear key angle, as the increase of concrete strength is associated with a significantly greater improvement in ultimate shear capacity.
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Ordinary Portland Cement | Gravel | River Sand | Water |
---|---|---|---|
450 kg/m3 | 1092 kg/m3 | 735 kg/m3 | 118 kg/m3 |
Young’s | ||||
---|---|---|---|---|
2500 kg/m3 | 25.8 GPa | 0.2 | 1.64 MPa | 19.21 MPa |
Density | Young’s Modulus | |||
---|---|---|---|---|
2500 kg/m3 | 25.8 GPa | 0.2 | 1.73 MPa | 22.52 MPa |
Parameter | ψ | ε | K | μ | |
---|---|---|---|---|---|
Value | 38° | 0.1 | 1.16 | 0.67 | 0.001 |
Young’s | |||
---|---|---|---|
7900 kg/m3 | 206 GPa | 0.3 | 400 MPa |
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Feng, F.; Huang, F.; Wen, W.; Ge, P.; Tao, Y. Enhanced Ultimate Shear Capacity of Concave Square Frustum-Shaped Wet Joint in Precast Steel–Concrete Composite Bridges. Appl. Sci. 2021, 11, 1915. https://doi.org/10.3390/app11041915
Feng F, Huang F, Wen W, Ge P, Tao Y. Enhanced Ultimate Shear Capacity of Concave Square Frustum-Shaped Wet Joint in Precast Steel–Concrete Composite Bridges. Applied Sciences. 2021; 11(4):1915. https://doi.org/10.3390/app11041915
Chicago/Turabian StyleFeng, Fan, Fanglin Huang, Weibin Wen, Peng Ge, and Yong Tao. 2021. "Enhanced Ultimate Shear Capacity of Concave Square Frustum-Shaped Wet Joint in Precast Steel–Concrete Composite Bridges" Applied Sciences 11, no. 4: 1915. https://doi.org/10.3390/app11041915
APA StyleFeng, F., Huang, F., Wen, W., Ge, P., & Tao, Y. (2021). Enhanced Ultimate Shear Capacity of Concave Square Frustum-Shaped Wet Joint in Precast Steel–Concrete Composite Bridges. Applied Sciences, 11(4), 1915. https://doi.org/10.3390/app11041915