Development of seismic structural response analysis method based on the fault-structure system incorporating the inversion analysis

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With aiming to further improve the accuracy of estimate on seismic structural response, we developed a new analysis method which is based on the fault-structure system: the fault mechanism, wave propagation through the crust, amplification near the surface, and soil-structure interaction. To analyze this system at high resolution and accuracy, we developed the forward tool with resolving difficulties: the extremely large computation cost of constructing a three-dimensional numerical model and solving the discretized governing equations. The accuracy of this forward tool is verified by comparing it to a Green's function solution. We demonstrate the potential utility of the method by estimating the seismic response of a large and complex structure in a given earthquake scenario. Further, in order to increase the reliability of this method, we also developed a prototype of the inversion analysis system incorporating the forward tool.