SCHEDULE: NOV 16-21, 2014

When viewing the Technical Program schedule, on the far righthand side is a column labeled "PLANNER." Use this planner to build your own schedule. Once you select an event and want to add it to your personal schedule, just click on the calendar icon of your choice (outlook calendar, ical calendar or google calendar) and that event will be stored there. As you select events in this manner, you will have your own schedule to guide you through the week.

ENTIRE WEEK SUNDAY MONDAY TUESDAY WEDNESDAY THURSDAY FRIDAY

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