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SCHEDULE: NOV 16-21, 2014

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Physics-Based Urban Earthquake Simulation Enhanced by 10.7 BlnDOF x 30 K Time-Step Unstructured FE Non-Linear Seismic Wave Simulation

SESSION: ACM Gordon Bell Finalist I

EVENT TYPE: Award Presentations & Award Talks, ACM Gordon Bell Finalists

TIME: 2:00PM - 2:30PM

SESSION CHAIR: Taisuke Boku

AUTHOR(S):Tsuyoshi Ichimura, Kohei Fujita, Seizo Tanaka, Muneo Hori, Maddegedara Lalith, Yoshihisa Shizawa, Hiroshi Kobayashi

ROOM:New Orleans Theater

ABSTRACT:

With the aim of dramatically improving the reliability of urban earthquake response analyses, we developed an unstructured 3-D finite-element-based MPI-OpenMP hybrid seismic wave amplification simulation code, GAMERA. On the K computer, GAMERA was able to achieve a size-up efficiency of 87.1% up to the full K computer. Next, we applied GAMERA to a physics-based urban earthquake response analysis for Tokyo. Using 294,912 CPU cores of the K computer for 11 h, 32 min, we analyzed the 3-D non-linear ground motion of a 10.7 BlnDOF problem with 30 K time steps. Finally, we analyzed the stochastic response of 13,275 building structures in the domain considering uncertainty in structural parameters using 3 h, 56 min of 80,000 CPU cores of the K computer. Although a large amount of computer resources is needed presently, such analyses can change the quality of disaster estimations and are expected to become standard in the future.

Chair/Author Details:

Taisuke Boku (Chair) - University of Tsukuba

Tsuyoshi Ichimura - University of Tokyo

Kohei Fujita - RIKEN and Japan Society for the Promotion of Science

Seizo Tanaka - University of Tokyo

Muneo Hori - University of Tokyo and RIKEN Advanced Institute for Computational Scince

Maddegedara Lalith - University of Tokyo

Yoshihisa Shizawa - Research Organization for Information Science and Technology

Hiroshi Kobayashi - Research Organization for Information Science and Technology

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Paper provided by the ACM Digital Library

Paper also available from IEEE Computer Society