TY - GEN
T1 - DEM slope-failure analysis of the Minami-Aso / Tateno area during the 2016 Kumamoto earthquakes
AU - Esaki, K.
AU - Akagi, H.
AU - Kiriyama, T.
AU - Sato, K.
N1 - Publisher Copyright:
© 2019 The Authors.
Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.
PY - 2019
Y1 - 2019
N2 - The Kumamoto earthquakes, which occurred on April 16, 2016, included deep large-scale landslides in the Minami-Aso village / Tateno area; the Aso Bridge collapsed completely because of this slope failure. Aso Bridge is considered to have collapsed for various reasons, e.g., fault displacements, earthquake accelerations, and landslide sediment depositions on the bridge. In this study, the possibility of landslide-sediment depositions on the bridge was assessed as a reason for the bridge collapse using the discrete element method (DEM), and the landslides at Aso Bridge were reproduced. An experiment and analysis were conducted on the large deformation of aluminum-bar laminated ground with wall movement, to confirm the applicability of DEM to large ground-deformation problems. Next, the Aso Bridge slope-failure analysis was carried out, based on different analysis conditions, and the sediment distribution was compared with field observation results from qualitative and quantitative viewpoints. It was concluded that sediment deposition on the bridge was not a cause of the Aso Bridge failure.
AB - The Kumamoto earthquakes, which occurred on April 16, 2016, included deep large-scale landslides in the Minami-Aso village / Tateno area; the Aso Bridge collapsed completely because of this slope failure. Aso Bridge is considered to have collapsed for various reasons, e.g., fault displacements, earthquake accelerations, and landslide sediment depositions on the bridge. In this study, the possibility of landslide-sediment depositions on the bridge was assessed as a reason for the bridge collapse using the discrete element method (DEM), and the landslides at Aso Bridge were reproduced. An experiment and analysis were conducted on the large deformation of aluminum-bar laminated ground with wall movement, to confirm the applicability of DEM to large ground-deformation problems. Next, the Aso Bridge slope-failure analysis was carried out, based on different analysis conditions, and the sediment distribution was compared with field observation results from qualitative and quantitative viewpoints. It was concluded that sediment deposition on the bridge was not a cause of the Aso Bridge failure.
KW - Discrete element method
KW - Kumamoto earthquakes
UR - http://www.scopus.com/inward/record.url?scp=85101969062&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85101969062&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:85101969062
T3 - 6th International Conference on Particle-Based Methods. Fundamentals and Applications, PARTICLES 2019
SP - 359
EP - 369
BT - 6th International Conference on Particle-Based Methods. Fundamentals and Applications, PARTICLES 2019
A2 - Onate, Eugenio
A2 - Wriggers, P.
A2 - Zohdi, T.
A2 - Bischoff, M.
A2 - Owen, D.R.J.
PB - International Center for Numerical Methods in Engineering
T2 - 6th International Conference on Particle-Based Methods. Fundamentals and Applications, PARTICLES 2019
Y2 - 28 October 2019 through 30 October 2019
ER -