DEM slope-failure analysis of the Minami-Aso / Tateno area during the 2016 Kumamoto earthquakes

K. Esaki, H. Akagi, T. Kiriyama, K. Sato

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

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.

Original languageEnglish
Title of host publication6th International Conference on Particle-Based Methods. Fundamentals and Applications, PARTICLES 2019
EditorsEugenio Onate, P. Wriggers, T. Zohdi, M. Bischoff, D.R.J. Owen
PublisherInternational Center for Numerical Methods in Engineering
Pages359-369
Number of pages11
ISBN (Electronic)9788412110111
Publication statusPublished - 2019
Event6th International Conference on Particle-Based Methods. Fundamentals and Applications, PARTICLES 2019 - Barcelona, Spain
Duration: 2019 Oct 282019 Oct 30

Publication series

Name6th International Conference on Particle-Based Methods. Fundamentals and Applications, PARTICLES 2019

Conference

Conference6th International Conference on Particle-Based Methods. Fundamentals and Applications, PARTICLES 2019
CountrySpain
CityBarcelona
Period19/10/2819/10/30

Keywords

  • Discrete element method
  • Kumamoto earthquakes

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Atomic and Molecular Physics, and Optics

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