著者

松島 信一 川瀬 博

出版者

日本建築学会

雑誌

日本建築学会構造系論文集 (ISSN:13404202)

巻号頁・発行日

vol.65, no.534, pp.33-40, 2000

被引用文献数

15 12

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We simulate strong motions in Kobe during the Hyogo-ken Nanbu (Kobe) earthquake of 1995 using a multiple asperity source model and a three-dimensional (3-D) basin structure. We derive a relatively simple rupture process, which consists of four asperities, using theoretical synthetics so that it matches the deconvolved bedrock motion at JMA Kobe. A realistic 3-D basin structure is constructed based on the exploration data. A 3-D finite difference method with fourth ordered staggered-grid scheme developed by Graves (1996) is used. The results show that with the combination of a relatively simple four asperity model and a 3-D basin structure, it is possible to reproduce strong ground motions in a wide area quite accurately. Peak velocity distribution is very similar to the JMA intensity distribution. From these results we confirm that we can reproduce strong ground motion in Kobe quite quantitatively by using a relatively simple source model that efficiently generate 1 second velocity pulses, together with a realistic 3-D basin structure.