Stress–Strain Field in an Innovative Metallic Dam Gate Used to Control the Water Flow
Abstract
:1. Introduction
2. Description of the Dam Gates
- own weight, including the weight of the piles, screed, dams, bridge, and other mechanical equipment;
- horizontal and vertical hydrostatic pressure;
- static and dynamic under-pressure;
- ice pressure (if applicable);
- the pressure of the alluvium;
- wave pressure;
- earthquake loads—inertial component and hydrodynamic component;
- loads due to temperature variations;
- wind action;
- forces caused by traction or braking on the tracks.
3. FEA Model Used to Analyze Different Load Design Scenarios
4. Results
- ❑
- The maximum stress for both cases analyzed exceeds the stress limit. In this situation, the design must be improved until this criterion is accomplished. The place of occurrence of the maximum stress is on the structure of bars. The values obtained on cases are the following:
- -
- Case 1: Stress = 390.54 [MPa]
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- Case 2: Stress = 661.61 [MPa].
- ❑
- Solutions proposed to reduce the stress in the assembly:
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- Strengthening the reinforcing bar system by increasing the thickness of the bars or their cross sections.
- -
- Application of a honeycomb plate system especially in the area close to the pole where the highest displacements obtained stresses in the structure.
- -
- Use of lighter materials (aluminum alloys or composite) to reduce the weight of the gate assembly (on the current design, a subassembly located on one side or the other of the column has 77.5 tons). By reducing the weight, lower inertias of the system will be obtained, especially for the situations of shock closing of the gates.
- -
- It is recommended to continue the static analysis scenarios with a dynamic analysis to take into account the average speed of a water stream.
- ❑
- The maximum resultant stress on the second case analyzed (the worst case) is reduced from 661 MPa to 352 MPa, which is 50%.
- ❑
- The global displacement magnitude is also reduced from 77 mm to 20 mm.
- -
- Strengthening the reinforcing bar system by increasing the thickness of the bars or their cross sections, especially for the bars that have a level of stress that exceeds the yield.
- -
- Application of a honeycomb plate system especially in the area close to the pole to increase the stiffness and reduce the global displacement.
5. Conclusions
- ❑
- The principal target was to minimize the maximum stress in the gate structure as much as possible using some of the hypothetical scenarios considered and described above.
- ❑
- The local maximum resultant stress close to the pole zone, in the second case analyzed (the worst case), was reduced from 352 Mpa to 263 Mpa, which is 25%.
- ❑
- The maximum stress moved to the other zone faraway from the polem and the maximum value was 426.7 MPa.
- -
- Strengthening the reinforcing bar system by increasing the thickness of the bars or their cross sections, especially for the bars that have a level of stress that exceed the yield.
- -
- In the zone with max stress, some additional short bars with a reinforcement role in the local zone can be applied.
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Itu, C.; Vlase, S. Stress–Strain Field in an Innovative Metallic Dam Gate Used to Control the Water Flow. Materials 2022, 15, 2689. https://doi.org/10.3390/ma15072689
Itu C, Vlase S. Stress–Strain Field in an Innovative Metallic Dam Gate Used to Control the Water Flow. Materials. 2022; 15(7):2689. https://doi.org/10.3390/ma15072689
Chicago/Turabian StyleItu, Calin, and Sorin Vlase. 2022. "Stress–Strain Field in an Innovative Metallic Dam Gate Used to Control the Water Flow" Materials 15, no. 7: 2689. https://doi.org/10.3390/ma15072689
APA StyleItu, C., & Vlase, S. (2022). Stress–Strain Field in an Innovative Metallic Dam Gate Used to Control the Water Flow. Materials, 15(7), 2689. https://doi.org/10.3390/ma15072689