Lessons from the 2003 Tokachi-oki, Japan, earthquake for prediction of long-period strong ground motions and sloshing damage to oil storage tanks
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The 2003 Tokachi-oki earthquake (M w 8.0) in northern Japan generated large-amplitude long-period (4–8 s) ground motions in the Yufutsu sedimentary basin, causing severe damage to seven large oil storage tanks with floating roof structures because of severe sloshing of oil. The 30,000–40,000-m3 tanks having suffered the severe damage such as fires and sinking of floating roofs experienced the sloshing with large amplitudes exceeding 3 m in which the fundamental mode was predominant. The second mode of sloshing was also excited in the 110,000-m3 tanks in which their floating roofs sank into oil, indicating that the higher modes of sloshing as well as the fundamental mode should be considered in damage prediction. The strong ground motion recordings demonstrated the earthquake dependency of predominant periods and the substantial spatial variation of the long-period shaking observed within the Yufutsu basin, meaning the necessity of source- and site-specific prediction of long-period strong ground motions. The two-dimensional numerical modeling suggested the importance of detailed structures of soft near-surface sediments as well as deep basin structure for accurate prediction of long-period strong ground motions in deep sedimentary basins.
Keywords2003 Tokachi-oki earthquake Long-period strong ground motion Sloshing Oil storage tank
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- Alterman Z, Karal FC Jr (1968) Propagation of elastic waves in layered media by finite difference methods. Bull Seismol Soc Am 58:367–398Google Scholar
- Hatayama K, Zama S, Nishi H, Yamada M, Hirokawa Y, Inoue R (2004) Long-period strong ground motion and damage to oil storage tanks due to the 2003 Tokachi-oki earthquake. Zisin 57:83–103 (in Japanese)Google Scholar
- Japan Meteorological Agency (2003) http://www.seisvol.kishou.go.jp/eq/mech/cmt/fig/cmt20030926045007.html
- Kaita S (2004) The damage of the national oil storage bases by the 2003 Tokachi-oki earthquake. In: Abstracts of PVP—vol. 490, Storage Tank Integrity and Materials Evaluation, San Diego, 25–29 July 2004Google Scholar
- Kanno T, Hatayama K, Tsuno S, Kudo K, Maeda T, Sasatani T, Furumura T, Sakaue M (2005) Estimation of deep underground structures in Yufutsu region by using array observations of microtremors. In: Programme and Abstracts of the 2005 Fall Meeting of the Seismological Society of Japan, Sapporo, 19–21 October 2005 (in Japanese)Google Scholar
- Kawase H, Aki K (1989) A study on the response of a soft basin for incident S, P, and Rayleigh waves with special reference to the long duration observed in Mexico City. Bull Seismol Soc Am 79:1361–1382Google Scholar
- Zama S (1985) Sloshing of liquid in oil storage tanks at Tomakomai in Hokkaido, due to the 1983 Japan Sea earthquake. Report of Fire Research Institute of Japan 60:1–10 (in Japanese)Google Scholar