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Seismic response analysis of double-trough aqueduct considering fluid-structure interaction effect
Liang Huang1, Haotian Li1, Mwansa Andrew Lupunga1
1School of Water Conservancy and Civil Engineering, Zhengzhou University, Zhengzhou, China.
Plos One
|August 4, 2023
Summary
Seismic analysis of double-tank aqueducts reveals that liquid movement is consistent across tanks during earthquakes. Increasing water levels enhance the liquid tuning damper (TLD) effect, significantly improving shock absorption and reducing seismic response.
Area of Science:
- Civil Engineering
- Structural Engineering
- Fluid Dynamics
Background:
- Current fluid-structure interaction models inadequately represent aqueduct-water dynamics during seismic events.
- Accurate seismic response analysis is crucial for the safety and resilience of aqueduct infrastructure.
Purpose of the Study:
- To analyze the seismic response of a double-tank aqueduct using fluid-solid bidirectional coupling.
- To investigate the influence of water levels on the shock absorption effectiveness and liquid movement within the tanks.
- To explore the sloshing amplitude and dynamic pressure changes related to liquid tuning dampers (TLDs).
Main Methods:
- Shaker tests were conducted to simulate earthquake actions.
- Volume of Fluid (VOF) method was employed for numerical simulations, incorporating free liquid levels.
- Fluid-solid bidirectional coupling was considered throughout the analysis.
Main Results:
- Liquid movement within the two tanks of the aqueduct was found to be largely consistent under seismic loading.
- The shock absorption effect, attributed to the TLD mechanism, increased with higher water levels, reaching a maximum peak absorption rate of 63.4%.
- Numerical simulations indicated a peak shock absorption rate of 50.4%, with liquid sloshing amplitude positively correlating with water level height.
Conclusions:
- The study validates the effectiveness of water within aqueduct tanks as a passive damping system.
- Optimizing water levels can significantly enhance seismic resilience in double-tank aqueduct structures.
- The findings provide valuable insights for the design and retrofitting of aqueducts subjected to seismic hazards.
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