離散型波数有限要素法を用いた地震動のシミュレーション

概要

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In this study, the discrete wavenumber/finite element (DWFE) method (Olson, 1982) and the fault dislocation theory were applied to the case of the Izu-Hanto-Toho-Oki earthquake (M=6.7) of 1980. Ground motions were computed at the sites of Kawana and Takada near the source region.The displacement seismograms synthesized from the theoretical method were compared with the actual strong-motion records. We were able to reproduce the recorded waveforms, particularly of body waves and the first portion of surface waves, by the theoretical synthesis method with a realistic crustal structure. The best agreement between the observed and synthesized waveforms was obtained for relatively long-period components with periods of 0.5-6 sec. The acceleration response spectra calculated at the two stations gave a good estimate of those observed over the period range from 0.5 to about 10 sec.
日本自然災害学会の論文
1986-09-30