著者

源栄 正人 永野 正行

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.61, no.488, pp.39-48, 1996

参考文献数

25

被引用文献数

18 2

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To estimate the amplification characteristics of the ground motions in the heavily damaged belt zone in Kobe City during the 1995 Hyogo-ken Nanbu earthquake, 3-D wave propagation analyses of a 2-D deep irregular underground structure model with vertical discontinuity were performed using the hyperelement method for incident plane waves expected from the wavefields due to the source mechanism. The incident waveform at bedrock is evaluated by deconvolution analysis using the observation record at Kobe University. The ground motion at the surface of the Osaka group layers and at ground surface are calculated. The effects of the deep irregular underground structure and shallow surface layers on the ground motion amplification are discussed. The analytical results show that the ground motions in the heavily damaged belt zone were amplified due to the focusing effect in the deep irregular underground structure as well as the shallow surface layers, and that the calculated maximum acceleration distributions coincide closely with the distribution of structural damage.