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Reliability estimation on dynamic responses of offshore structures

Research Project

Project/Area Number 08650555
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 構造工学・地震工学
Research InstitutionKagoshima University

Principal Investigator

KAWANO Kenji  Kagoshima University, Department of ocean civil engineering, Professor, 工学部, 教授 (10026297)

Co-Investigator(Kenkyū-buntansha) VENKATARAMANA Katta  Kagoshima university, Department of ocean civil engineering Associate Professor, 工学部, 助教授 (30244263)
Project Period (FY) 1996 – 1997
Project Status Completed (Fiscal Year 1997)
Budget Amount *help
¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 1997: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 1996: ¥1,300,000 (Direct Cost: ¥1,300,000)
Keywordsoffshore structure / reliability / dynamic response / wave force / earthquake force / buoyancy type member / current force / 海洋構造物 / 回流水槽実験 / 波力 / 地震力 / 信頼性
Research Abstract

Offshore platform with large deck area may provide great possibilities to develop ocean spaces which may be used as resident areas, airport, power stations, etc.. Since these structures have very heavy dead loads, reaction forces on the base foundation become severe and necessitate very firm foundation system. If thses reaction forces can be reduced by some method such as large diameter members of buoyancy-type, the concept of large offshore platforms with the buoyancy type large diameter member may become popular in the offshore industry. In this study, emphasis is placed on examining the dynamic response of such a structure under the action of sea waves, currents and earthquakes. The main results are summarized as follows :
(1)The wave forces and the corresponding responses are amaller for the structure which has the buoyancy type member near the sea bottom. On the other hand, the current force gives significant effects on the response evaluations for the offshore structure with buoyancytype member and it is important to evaluate these effects.
(2)The dynamic responses of the offshore structure are influenced by the variation of parameters which are related to the wave force evaluation and structural characteristics. Since these random parameters also influence the response values, it is necessary to examine their effects on the responses and the reliability evaluation.
(3)It is necessary to develop rational methods to evaluate the reliability of offshore structures subjected to wave and earthquake forces which have entirely different characteristics in terms of excitation duration. One of the methods may be to compute the earthquake response first and then correlate it to the equivalent wave response and the wave loading conditions.

Report

(3 results)
  • 1997 Annual Research Report   Final Research Report Summary
  • 1996 Annual Research Report

Research Products

(22 results)

All Other

All Publications

  • [Publications] K.Kawano, K.Venkataramana: "Dynamic response approximation of offshore structures" Seronth international Confen.on Computing in cioil and Building eng.Vol.3. 1637-1642 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K.Kawano, K.Venkataramana: "Dyromic response analysis of semi float tybe oggshore" Prsc.of Seventh interna.offsh ore and polar eng.Vol.4. 485-492 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K.Kawano: "Dynamic response analyese of offchore platform with bucyancy type lerge membons" Prsc.of Sixth interna.offshor e and polar eng.Vol.1. 176-186 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K.Kawano, K.Venkataramana: "Reduction effects on seismic responses of offshore structores" Proc.of the 11th World confer.Earthquake Eng.No.284. 1-8 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K.Venkataramana, K.Kawano: "Parametric uncertainties for dynamic responce eraleation of offsbore structures" Computational mechanics. Vol.18. 454-463 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 河野 健二: "大型の浮力部材を有する海洋構造物の動的変容解析" 構造工学論文集. Vol.42A. 873-880 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K.Kawano, K.Venkataramana: "Dynamic response approximation of offshore structures" Seventh intern. confer. on computing in civil and building eng.1637-1642 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K.Kawano, K.Venkataramana: "Dynamic response analysis of semi float type offshore platform" Proc. of the seventh interna. offshore and polar eng.Vol.1.4. 485-492 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K.Kawano: "Dynamic response analyzes of offshore platform with buoyancy type large members" Proc. of the seventh interna. offshore and polar eng.Vol.1. (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K.Kawano, K.Venkataramana: "Reduction effects on seismic responses of offshore structures" Proc.of the 11^<th> world conf.Earthq.Eng., Mexico. No.284. (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K.Venkataramana, K.Kawano: "Dynamic respones characteristics of offshore structures to sea waves, current and earthquake excitations" Seventh intern. confer. on computing in civil and building eng.1631-1636 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K.Venkataramana, K.Kawano: "Parametric uncertainties for dynamic response evaluation of offshore structures" Computational mechanics. Vol.18. 454-463 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K.Kawano, K.Venkataramana: "Dynamic response approximation of offshore structures" Seventh international Confer.on Computing in civil and Building eng.Vol.3. 1637-1642 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] K.Kawano, K.Venkataramana: "Dynamic response analysis of Semi float type offshore pletform" Proc.of Seventh interna.offshore and Polar eng.Vol.4. 485-492 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] K.Kawano: "Dynamic response analyses of offshore platform with buoyancy type lange members" Proc.of Sixth interna.offshore and Polar eng.Vol.1. 176-186 (1996)

    • Related Report
      1997 Annual Research Report
  • [Publications] K.Kawano, K.Venkataramana: "Reduction effects on Seismic responses of offshore structures" Proc.of the 11th world Confer.Eanthquake Eng.NO.284. 1-8 (1996)

    • Related Report
      1997 Annual Research Report
  • [Publications] K.Venkataramana K.Kawano: "Parametric uncertain ties for dynamic response evaluation of offshore structures" Computational mechanics. Vol.18. 454-463 (1996)

    • Related Report
      1997 Annual Research Report
  • [Publications] 河野 健二: "大型の浮力部材を有する海洋構造物の動的応答解析" 構造工学論文集. Vol.42A. 873-880 (1996)

    • Related Report
      1997 Annual Research Report
  • [Publications] 河野健二 Venkataramana K.: "Reduction Effects on Seismic Responses of off shore" World Confenence on Earthguake Fiopinesring. ISBN008042822. 1-8 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 河野健二: "Dynamic Response Analyses of offshore platform with Buoyancy Type Large Members" Proc.of Sixth Inter.offshere and polar Eng.Conf. vol.I. 176-181 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Venkataramana K.河野健二: "Parametric uncertainties for dynamic response evalmetion of offshere structures" Computational Mechanics. 18. 454-463 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Venkataramana K.河野健二: "On the Sebection of Ground Acceleration spectran for Respense Evaluation of offehore Structures" Proc.of Sixth Inter.offshore and polar Eng.Conf.Vol.I,. 182-189 (1996)

    • Related Report
      1996 Annual Research Report

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Published: 1996-03-31   Modified: 2016-04-21  

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