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Effects of Barrier Stiffness on Debris Flow Dynamic Impact—I: Laboratory Flume Test
Article

Effects of Barrier Stiffness on Debris Flow Dynamic Impact—II: Numerical Simulation

by 1,2,*, 1 and 1
1
Department of Geotechnical Engineering, College of Civil Engineering, Tongji University, Shanghai 200092, China
2
Key Laboratory of Geotechnical and Underground Engineering of the Ministry of Education, Tongji University, Shanghai 200092, China
*
Author to whom correspondence should be addressed.
Academic Editor: Maria Mimikou 
Water 2022, 14(2), 182; https://doi.org/10.3390/w14020182
Received: 23 November 2021 / Revised: 30 December 2021 / Accepted: 5 January 2022 / Published: 10 January 2022
(This article belongs to the Special Issue Mechanism and Prevention of Debris Flow Disaster)
The destructive and impactful forces of debris flow commonly causes local damage to engineering structures. The effect of a deformable barrier on the impact dynamics is important in engineering design. In this study, a flow–structure coupled with Smoothed Particle Hydrodynamics model was presented to investigate the effects of barrier stiffness on the debris impact. A comparison of the results of physical tests and simulation results revealed that the proposed smoothed particle hydrodynamics model effectively reproduces the flow kinematics and time history of the impact force. Even slight deflections of the deformable barrier lead to obvious attenuation of the peak impact pressure. Additionally, deformable barriers with lower stiffness tend to deform more downstream upon loading, shifting the deposited sand toward the active failure mode and generating less static earth pressure. When the debris flow has a higher frontal velocity, the impact force on the barrier is dominated by the dynamic component and there is an appreciable effect of the stiffness of the deformable barrier on load attenuation. View Full-Text
Keywords: debris flow; impact pressure; smoothed particle hydrodynamics; fluid–structure interaction; regularized Bingham model debris flow; impact pressure; smoothed particle hydrodynamics; fluid–structure interaction; regularized Bingham model
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MDPI and ACS Style

Huang, Y.; Jin, X.; Ji, J. Effects of Barrier Stiffness on Debris Flow Dynamic Impact—II: Numerical Simulation. Water 2022, 14, 182. https://doi.org/10.3390/w14020182

AMA Style

Huang Y, Jin X, Ji J. Effects of Barrier Stiffness on Debris Flow Dynamic Impact—II: Numerical Simulation. Water. 2022; 14(2):182. https://doi.org/10.3390/w14020182

Chicago/Turabian Style

Huang, Yu, Xiaoyan Jin, and Junji Ji. 2022. "Effects of Barrier Stiffness on Debris Flow Dynamic Impact—II: Numerical Simulation" Water 14, no. 2: 182. https://doi.org/10.3390/w14020182

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