Dynamic Response Analysis of Intake Tower-Hydrodynamic Coupling Boundary Based on SV Wave Spatial Incidence
Abstract
:1. Introduction
2. Artificial Boundary Theory and SV Wave Oblique Incidence Dynamic Equation
2.1. Artificial Boundary Theory
2.2. SV Wave Oblique Incident Dynamic Equation
3. Finite Element Model and Calculation Parameters
3.1. Finite Element Model of Intake Tower
3.2. Incident Wave Parameters and Selection
4. Results and Analysis
4.1. Displacement and Acceleration Response Analysis
4.2. Stress Analysis
4.3. Analysis of SV Wave Oblique Incident Dynamic Water Pressure
4.4. Damage Characteristics Analysis of SV Wave Oblique Incident Water Intake Tower
5. Conclusions
- (1)
- According to the ground motion load condition of the water intake tower in this paper, when the SV wave is vertically incident at an angle of 0°, each dynamic response reaches its maximum value; when its oblique incident is at 9°, each response reaches its minimum value; when its oblique incident is at 35°, each response is slightly less than 0°. The displacement response, acceleration response, and stress state of the intake tower decrease first and then increase as the angle changes. At 0° vertical incidence and 35° oblique incidence, the maximum decrease and increase in the displacement, acceleration response, and stress state of the intake tower appear, which has a great impact on the dam body safety, mainly manifested in the tower position shift response decrease of 82.05% and the maximum acceleration response increase of 55.03%. This indicates that the displacement response of the intake tower is sensitive to the change in SV wave incidence angle.
- (2)
- According to the ground motion load condition of the water intake tower in this paper, when the SV wave incident is at different angles, the dynamic water pressure distribution on each oncoming surface is similar, showing a parabolic distribution law, and increases with the water depth; when SV wave is vertically incident at 0°, the peak pressure of dynamic water reaches the maximum value. When SV wave is oblique incident at 35°, the mean value of dynamic water pressure changes with water depth is the maximum.
- (3)
- According to the ground motion load condition of the water intake tower in this paper, the damage location of the intake tower under the oblique incidence of SV wave is mainly concentrated in the rear of the tower and the interaction surface of the backfill concrete and the interface between the tower body and the tower base. The results of tensile damage show that under the same seismic intensity, the damage diffusion velocity, damage area, and damage degree of SV wave are the most rapid, extensive, and intense under 0° vertical incidence and 35° oblique incidence. Therefore, when designing the stability of hydraulic structure, the dynamic response of SV wave incident at 0° angle and incident at critical angle should be mainly considered.
Author Contributions
Funding
Conflicts of Interest
References
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Material | Density (kg/m3) | Elasticity Modulus (MPa) | Poisson’s Ratio |
---|---|---|---|
Tower body | 2500 | 2.8 × 104 | 0.167 |
Tower base | 2500 | 3.0 × 104 | 0.167 |
Foundation | 2720 | 1.5 × 104 | 0.2 |
Angle (°) | Tensile Stress (MPa) | Compressive Stress (MPa) |
---|---|---|
0° | 3.21 | 4.90 |
9° | 1.98 | 2.27 |
18° | 2.14 | 2.63 |
27° | 2.10 | 2.23 |
35° | 2.70 | 4.26 |
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Zheng, X.; Shen, Y.; Zong, X.; Su, H.; Zhao, X. Dynamic Response Analysis of Intake Tower-Hydrodynamic Coupling Boundary Based on SV Wave Spatial Incidence. Buildings 2023, 13, 1704. https://doi.org/10.3390/buildings13071704
Zheng X, Shen Y, Zong X, Su H, Zhao X. Dynamic Response Analysis of Intake Tower-Hydrodynamic Coupling Boundary Based on SV Wave Spatial Incidence. Buildings. 2023; 13(7):1704. https://doi.org/10.3390/buildings13071704
Chicago/Turabian StyleZheng, Xiaodong, Yiming Shen, Xingguang Zong, Hui Su, and Xun Zhao. 2023. "Dynamic Response Analysis of Intake Tower-Hydrodynamic Coupling Boundary Based on SV Wave Spatial Incidence" Buildings 13, no. 7: 1704. https://doi.org/10.3390/buildings13071704