TY - GEN
T1 - Effects of Particle Characteristics on Impact Force from a Granular Sliding Mass on a Rigid Obstruction
AU - Grant, Andrew
AU - Ahmadipur, Amir
AU - Qiu, Tong
N1 - Funding Information:
Support of this study is provided by the U.S. National Science Foundation (NSF) under Award #CMMI-1453103. This support is gratefully acknowledged.
Publisher Copyright:
© 2019 American Society of Civil Engineers.
PY - 2019
Y1 - 2019
N2 - Understanding the behavior and quantifying the impact force of a granular sliding mass are crucial to landslide hazard assessment and designing protective structures against landslide debris. The study of a granular sliding mass provides useful insight into the characteristics of sudden onset, rapid granular flow. There are several factors, such as inclination angle, basal friction between the granular flow and the flow bed, particle size and shape, and distance to a rigid obstruction, which influence the impact force and behavior of granular flow. In order to systematically investigate the effects of these factors on the impact force from granular flow, a two-dimensional sand flume was designed and constructed. This sand flume included a load measurement device consisting of six dynamic load cells, which served as the rigid obstruction. In this study, the effects of particle characteristics on the impact force were studied by using two different granular materials with mean particle sizes of 0.25 and 1.98 mm. Impact forces and flow front velocities were measured and compared. The results indicate that the different basal friction angles for the two materials result in different flow velocities and final static forces. Moreover, the different flow velocities, densities, depths, and stiffness result in different dynamic force components.
AB - Understanding the behavior and quantifying the impact force of a granular sliding mass are crucial to landslide hazard assessment and designing protective structures against landslide debris. The study of a granular sliding mass provides useful insight into the characteristics of sudden onset, rapid granular flow. There are several factors, such as inclination angle, basal friction between the granular flow and the flow bed, particle size and shape, and distance to a rigid obstruction, which influence the impact force and behavior of granular flow. In order to systematically investigate the effects of these factors on the impact force from granular flow, a two-dimensional sand flume was designed and constructed. This sand flume included a load measurement device consisting of six dynamic load cells, which served as the rigid obstruction. In this study, the effects of particle characteristics on the impact force were studied by using two different granular materials with mean particle sizes of 0.25 and 1.98 mm. Impact forces and flow front velocities were measured and compared. The results indicate that the different basal friction angles for the two materials result in different flow velocities and final static forces. Moreover, the different flow velocities, densities, depths, and stiffness result in different dynamic force components.
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U2 - 10.1061/9780784482070.020
DO - 10.1061/9780784482070.020
M3 - Conference contribution
AN - SCOPUS:85063608049
SN - 9780784482070
T3 - Geotechnical Special Publication
SP - 205
EP - 212
BT - Geotechnical Special Publication
A2 - Meehan, Christopher L.
A2 - Kumar, Sanjeev
A2 - Pando, Miguel A.
A2 - Coe, Joseph T.
PB - American Society of Civil Engineers (ASCE)
T2 - 8th International Conference on Case Histories in Geotechnical Engineering: Embankments, Dams, and Slopes, Geo-Congress 2019
Y2 - 24 March 2019 through 27 March 2019
ER -