Abstract
We conduct an urban earthquake simulation with city-block scale 3D nonlinear ground motion analysis and multiscenario analysis of building structure response by utilizing the large and fast compute capability of the K computer. Here, we model a 1.25 km x 1.25 km city block of Shinjuku, Tokyo with temporal resolution of 15 Hz, and compute its response under the 1995 Kobe wave and 1968 Hachinohe wave. In order to reflect the uncertainty of building structure models to the simulation results, we generate many models with varying structural parameters, and compute their response under the Kobe wave input. By increasing the number of samples to 10,000, we were able to obtain convergence of the response distribution. By combining 3D ground motion analysis and multi-scenario analysis of structures, we can improve the scientific rationality of disaster estimations, and can evaluate the damage of structures in terms of probability distributions.
