設計工学・システム部門講演会講演論文集
Online ISSN : 2424-3078
セッションID: 3201
会議情報
3201 高レベル地震時における大型石油タンクの局部腐食減肉側板の弾塑性ひずみ(OS13 貯槽の防災と設計II)
袁 海河野 和間坂上 隆英吉田 聖一光田 司
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会議録・要旨集 フリー

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The shell plate of oil storage tank is an important evaluating component in the Fitness-For Service Assessment, because it is required to have a sufficient strength against to the static and dynamic pressure in case of operation and an earthquake. This paper reported the analysis results of elastic-plastic strain occurred at the local thin areas (LTAs) of shell plate obtained by using a nonlinear isotropic/kinematic hardening model. The strain tendency has been investigated when LTA is assumed as a rectangular area or a ring area and its size as study parameters. The investigation results show that there is a tendency for elasto-plastic strain to be going up when the longitudinal length of LTA lengthens gradually and the thickness of side plate is decreased. But there is not any ratcheting behavior in LTA because of small strain range although subjected to cyclic loading.
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© 2005 一般社団法人 日本機械学会
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