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Development of Scalable Three-Dimensional Elasto-Plastic Nonlinear Wave Propagation Analysis Method for Earthquake Damage Estimation of Soft Grounds

  • Atsushi Yoshiyuki
  • Kohei Fujita
  • Tsuyoshi Ichimura
  • Muneo Hori
  • Lalith Wijerathne
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 10861)

Abstract

In soft complex grounds, earthquakes cause damages with large deformation such as landslides and subsidence. Use of elasto-plastic models as the constitutive equation of soils is suitable for evaluation of nonlinear wave propagation with large ground deformation. However, there is no example of elasto-plastic nonlinear wave propagation analysis method capable of simulating a large-scale soil deformation problem. In this study, we developed a scalable elasto-plastic nonlinear wave propagation analysis program based on three-dimensional nonlinear finite-element method. The program attains 86.2% strong scaling efficiency from 240 CPU cores to 3840 CPU cores of PRIMEHPC FX10 based Oakleaf-FX [1], with 8.85 TFLOPS (15.6% of peak) performance on 3840 CPU cores. We verified the elasto-plastic nonlinear wave propagation program through convergence analysis, and conducted an analysis with large deformation for an actual soft ground modeled using 47,813,250 degrees-of-freedom.

Notes

Acknowledgment

We thank Dr. Takemine Yamada, Dr. Shintaro Ohno and Dr. Ichizo Kobayashi from Kajima Corporation for comments concerning the soil constitutive model.

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Copyright information

© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  • Atsushi Yoshiyuki
    • 1
  • Kohei Fujita
    • 1
  • Tsuyoshi Ichimura
    • 1
  • Muneo Hori
    • 1
  • Lalith Wijerathne
    • 1
  1. 1.Earthquake Research Institute and Department of Civil EngineeringThe University of TokyoBunkyōJapan

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