【企画】リスク評価とその応用

[SS02A-05] Basic research on Data-Driven Seismic Response Analysis based on Identification of Temporal Evolution in Dynamics

*Akihiro Shioi¹, Yu Otake¹, Ikumasa Yoshida², Yusuke Fukunaga³, Masafumi Miyata³, Syogo Muramatsu⁴ (1. Tohoku University, 2. Tokyo City University, 3. National Institute for Land and Infrastructure Management , 4. Niigata University)

Keywords:Dynamic Mode Decpmposition, seismic response analysis, time transition matrix

This research is basic research for applying Dynamic Mode Decomposition (DMD) to the seismic response analysis. We propose a data-driven analysis method that utilizes only the seismic motion observation waveforms on the ground surface for one-dimensional seismic response analysis. By formulating an approximation with a single-degree-of-freedom equation of motion, we give physical meaning to the DMD's identification parameters and make future predictions based on the equation of motion.We propose a model that expresses the non-stationarity of input seismic motion by equivalent linearizaton the material nonlinearity and adding a compulsory term to the DMD.