Quantitative analysis reveals pipeline damage from liquefaction in the 1983 earthquake, suggesting significant impact from ground conditions.
The 1983 Middle Japan Sea Earthquake (M=7.7) which occurred off the west coast AKita Prefecture caused extensive damage to lifeline systems. The authors already reported the results of field investigations. The present paper discusses the damage to the buried pipelines due to liquefaction. The purposes of the present study are to analyze the damage of pipelines quantitatively employing a statistical method and to make clear the failure mode of the buried pipeline. It became evident from the present study that the damage to pipeline was strongly influenced by the state of ground, especially soil liquefaction.
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北浦 et al. (1985) studied this question.
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