極めて柔軟かつ厚いコアを有するパイプインパイプ断面の静水圧による局部座屈特性

書誌事項

タイトル別名
  • Local Buckling Characteristics of Structural Pipe-in-Pipe Cross-Sections with Very Soft and Thick Cores under External Fluid Pressure
  • キワメテ ジュウナン カツ アツイ コア オ ユウスル パイプインパイプ ダンメン ノ セイスイアツ ニ ヨル キョクブザクツトクセイ

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説明

This paper presents an analysis of local collapse mechanisms of a structural pipe-in-pipe cross-section with very soft and thick core when subjected to external hydrostatic pressure. It formulates and solves the elastic collapse problem using the variational principle of minimum potential energy. Effects of therelative stiffness between the outer/inner pipes and the core, and the core thickness on the critical external pressures and the collapse modes are investigated. The paper also proposes a simplified formulation of the localbuckling problem where the outer pipe and its contact with the filler material is considered as a ‘ringon an elastic foundation’.

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