Impact Pressure Influence of Flood on Bridge Deck under Sediment Deposition Conditions: An Experimental Study

Zhipan Niu, Yi Long, Chuke Meng, Hang Yang, Yihan Luo and Weiyang Zhao ()
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Zhipan Niu: Institute for Disaster Management and Reconstruction, Sichuan University, Chengdu 610207, China
Yi Long: Institute for Disaster Management and Reconstruction, Sichuan University, Chengdu 610207, China
Chuke Meng: Institute for Disaster Management and Reconstruction, Sichuan University, Chengdu 610207, China
Hang Yang: Institute for Disaster Management and Reconstruction, Sichuan University, Chengdu 610207, China
Yihan Luo: Institute for Disaster Management and Reconstruction, Sichuan University, Chengdu 610207, China
Weiyang Zhao: Institute for Disaster Management and Reconstruction, Sichuan University, Chengdu 610207, China

Sustainability, 2023, vol. 15, issue 18, 1-12

Abstract: This paper investigates the impact of sediment deposition and inflow conditions on horizontal impact pressure and frequency analysis of bridge deck vibrations during flooding. Flooding-induced pressure and vibrations contribute to bridge collapse, and sediment deposition influences water flow and impact pressure. The study explores the relationship between sediment deposition height and impact pressure, revealing a significant increase as sediment approaches 50% of bridge deck clearance. Sediment amplifies impact pressure response to flow velocity changes. The dimensionless sediment deposition height has a greater influence on impact pressure compared to the inflow Froude number. Two distinct frequencies, dominant and secondary, are identified for impact pressure and water level fluctuations. Dominant frequencies positively correlate with sediment deposition height and Froude number, indicating an increasing trend. Secondary frequencies remain stable (0.31–0.58 Hz). These findings enhance understanding of flow dynamics and bridge–flow interaction in sediment-deposited channels, providing theoretical support for evaluating and managing disasters related to bridges in such environments. Overall, this research contributes to the field of bridge engineering and supports improved design and maintenance practices for bridges exposed to sediment-deposited channels.

Keywords: flood; sediment deposition; bridge deck; impact pressure; fluctuation; model experiment (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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