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Study on Dynamic Interaction problems of Seabed-Structure Systems under Waves

Research Project

Project/Area Number 07650577
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Geotechnical engineering
Research InstitutionTokai University

Principal Investigator

FUKUE Masaharu (1996)  Tokai University, School of Marine Science and Technology, Professor, 海洋学部, 教授 (40119699)

川上 哲太郎 (1995)  東海大学, 海洋学部, 講師 (40204680)

Co-Investigator(Kenkyū-buntansha) KITAHARA Michihiro  Tokai University, School of Marine Science and Technology, Professor, 海洋学部, 教授 (60135522)
Project Period (FY) 1995 – 1996
Project Status Completed (Fiscal Year 1996)
Budget Amount *help
¥1,800,000 (Direct Cost: ¥1,800,000)
Fiscal Year 1996: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1995: ¥1,100,000 (Direct Cost: ¥1,100,000)
KeywordsSeabed / Offshore structure / Dynamic interaction / Pore water pressure / Numerical analysis / BEM / Water wave / Stability
Research Abstract

The dynamic response of seabed is one of the important subjects for the design of gravity type of offshore structures. The dynamic response of seabed results from the dynamic interactions of the seabed-structure-fluid systems.
In this study, an experimental study and a numerical analysis were carried out to evaluate the dynamic response of seabed in terms of a dynamic interaction problem of the seabed-structure-fluid system under water waves.
Two dimensional model experiments with the gravity type structure were carried out to determine the response characteristics of the excess pore water pressure under the water waves. From the theoretical point of view, the boundary integral equations were formulated to solve the dynamic interaction problems of the seabed-structure-fluid system. In this analysis, the seabed is assumed as a fluid-saturated poroelastic material. The fluid is assumed to be a perfect fluid and the structure is to be a linear elastic body.
The main results of this study are as follows :
1) The pore water pressure decreases exponentially as the seabed depth increases.
2) As the soil depth increase, the phase time of pore water presure becomes longer.
3) It was found that from the numerical analysis, the deformation, principal stresses and pore water pressure in a model seabed were influenced by the motion of a structure associated with wave length.

Report

(3 results)
  • 1996 Annual Research Report   Final Research Report Summary
  • 1995 Annual Research Report
  • Research Products

    (19 results)

All Other

All Publications (19 results)

  • [Publications] Utsumi,H.,Kawakami,T.and Kitahara,M.: "Effect of Fluid Saturated Porosity of the Seabed for Interaction Problems of the Fluid-Structure-Seabed System" Proceedings of the International Conference on Computational Engineering Science,Springer. 2957-2962 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 内海秀幸,川上哲太朗,北原道弘: "地震時における海洋構造物の根入れ効果の検討" 境界要素法論文集. 12. 133-138 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Utsumi,H.,Kawakami,T.and Kitahara,M.: "Stress distribution in the foundation of offshore structure during earthquake and water wave" Proceedings of 7th Japan-China Symposium on Boundary Element Methods,Elsevier. 103-112 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 内海秀幸,川上哲太朗,北原道弘: "多孔質海底地盤内の動的応力に及ぼす間隙率の影響" 境界要素法論文集. 13. 137-142 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Fukue,M,Nakamura T.: "Effects of carbonate on cementation of marine soils" Marine Georesources and Geotechnology. 14. 37-45 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Fukue,M.and Nakamura,T.,Kato,Y.and Naoe,K: "Correlation among carbonate content,accumulation rate and topography of seabed" Soils and Foundations. 36. 51-60 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Utsumi, H., Kawakami, T.and Kitahara, M: "Effect of fluid saturated porosity of the seabed for interaction problems of the fluid-structure-seabed system." Proceeding of the international Conference on Computational Engineering Science, Springer. 2957-2962 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Utsumi, H., Kawakami, T.and Kitahara, M: "Effect of depth for marine structure during earthquake." Proceeding of 12th Symposium on BEM's JASCOME. 133-138 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Utsumi, H., Kawakami, T.and Kitahara, M: "Stress in the foundation of offshore structure during earthquake and water wave." Proceeding of 7th Japan-China Symposium on Boundary Element Methods, Elsevier. 103-112 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Utsumi, H., Kawakami, T.and Kitahara, M: "Effects of porosity on Dynamic stress distribution in fluid saturated poroelastic." Proceeding of 13th Symposium on BEM's, JASCOME. 137-142 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Fukue, M.and Nakamura, T.: "Effects of carbonate on cementation of marine soils." Marine Georesources and Geotechnology. 14. 37-45 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Fukue, M.Nakamura, T., Kato, Y.and Naoe, K.: "Correlation among carbonate content, accumulation rate and topography of seabed." Soils and Foundations. 36. 51-60 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Utsumi,H.,Kawakami,T.and Kitahara,M.: "Effect of Fluid Saturated Porosity of the Seabed for Interaction Problems of the Fluid-Structure-Seabed System" Proceedings of the International Conference on Computational Engineering Science,Springer. 2957-2962 (1995)

    • Related Report
      1996 Annual Research Report
  • [Publications] 内海秀幸,三上哲太朗,北原道弘: "地震時における海洋構造物の根入れ効果の検討" 境界要素法論文集. 12. 133-138 (1995)

    • Related Report
      1996 Annual Research Report
  • [Publications] Utsumi,H.,Kawakami,T.and Kitahara,M.: "Stress distribution in the foundation of offshore structure during earthquake and water wave" Proceedings of 7th Japan-China Symposium on Boundary Element Methods,Elsevier. 103-112 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 内海秀幸,三上哲太朗,北原道弘: "多孔質海底地盤内の動的応力に及ぼす間隙率の影響" 境界要素法論文集. 13. 137-142 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Fukue,M.and Nakamura,T.: "Effects of carbonate on cementation of marine soils" Marine Georesources and Geotechnology. 14. 37-45 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Fukue,M,and Nakamura,T.,Kato,Y.and Naoe,K: "Correlation among carbonate content,accumulation rate and topography of seabed" Soils and Foundations. 36. 51-60 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] H. Utsumi: "Effect of Fluid Saturated Porosity of the Seabed for Interation Problems of the Fluid-Structure-Seabed System" Proceedings of the International Conference on Computational Engineering Science, Springer.2957-1962 (1995)

    • Related Report
      1995 Annual Research Report

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Published: 1995-04-01   Modified: 2016-04-21  

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