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Vortex-induced oscillations of reinforced concrete chimneys and its wind tunnel studies using elastic models.

Research Project

Project/Area Number 63550424
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field Building structures/materials
Research InstitutionTokyo Polytechnic University

Principal Investigator

TAMURA Yukio  Tokyo Institute of Polytechnics. Architecture Professor, 工学部, 教授 (70163699)

Project Period (FY) 1988 – 1990
Project Status Completed (Fiscal Year 1991)
Budget Amount *help
¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 1990: ¥300,000 (Direct Cost: ¥300,000)
Fiscal Year 1989: ¥900,000 (Direct Cost: ¥900,000)
Keywordswind tunnel testing / elastic model / similarity law / reinforced concrete / vortex excitation / Reynolds number / Strouhal number / drag coefficient / レイノズル数 / 鉄筋コンクリート / 煙突 / 渦励動振 / ストローハル数
Research Abstract

When the dynamic behavior of buildings or structures is simulated in the wind tunnel testings, the dynamic similarity requirements both of the wind characteristics and the structures should be satisfied. The model air density is usually equal to the full-scale air density. Therefore, in order to make the mass ratio identical, the material density of the model should be equal to that of the full-scale structure. When attention is paid on some particular reduced frequencies, e. g. the vortex resonance, the value of the elastic modulus of the material of the model restricts the windspeed of testings as well as the size of the model. The interested reduced frequency of the phenomena should be realized in the available windspeed range inherent to the wind tunnel and its facilities or instruments.
The new material for the wind tunnel simulations of reinforced concrete structures is investigated and composed. The Epoxy resin was selected as the stuff of the material of the model. The density of the reinforced concrete is about 2.4g/cm^3 while the density of the Epoxy resin is 1.2g/cm^3. As the density of the Epoxy resin is smaller than that of the reinforced concrete, in order to make the mass parameter identical, the iron powder is added into the solvent.
Then, the wind tunnel testings on the vortex-induced oscillations of a reinforced concrete chimney are carried out using a model made of this material. The dynamic behavior of the model is compared with the full-scale data, and it is confirmed that the material is available to the wind tunnel testings.
Finally, the method for wind resistant design of the reinforced concrete structures with a circular section are proposed.

Report

(4 results)
  • 1991 Final Research Report Summary
  • 1990 Annual Research Report
  • 1989 Annual Research Report
  • 1988 Annual Research Report
  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] Yukio TAMURA,Isao NiSHIMURA: "Elastic Model of Reinforced Concrete Chimney for Wind Tunnel Testing" Journal of Wind Engineering(日本風工学会誌). No.37. 395-400 (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Yukio TAMURA,Isao NISHIMURA: "Elastic Model of Reinforced Concrete Chimney for Wind Tunnel Testing" Proceedings of the International Colloquium on Bluff Body Aerodynamics and Its Applications(Elsevier). 231-236 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 田村 幸雄,片桐 純治,丸川 比佐夫,藤井 邦雄,後藤 周平: "超高RC煙突の弾性相似模型と渦励振応答予測について" 日本風工学会誌. No.49. (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Yukio Tamura, Isao Nisimura: "Elastic model of reinforced concrete chimney for wind tunnel testing." Journal of Wind Engineering. No. 37. 395-400 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Yukio Tamura, Isao Nisimura: "Elastic model of reinforced concrete chimney for wind tunnel testing." Bluff Body Aerodymanics and Its Applications. Elsevier. 231-236 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Yukio Tamura, Junji Katagiri, Hisao Marukawa, Kunio Fujii, Shuhei Goto: "Elastic model of High-rise RC chimney and prediction of vortex-excited motions" Journal of Wind Engineering. No. 49. (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Yukio TAMURA,Isao NISHIMURA: "Elastic Model of Reinforced Concrete Chimney for Wind Tunnel Testing" Journal of Wind Engineering (日本風工学会誌). No.37. 395-400 (1988)

    • Related Report
      1990 Annual Research Report
  • [Publications] Yukio TAMURA,Isao NISHIMURA: "Elastic Model of Reinforced Concrete Chimney for Wind Tunnel Testing" Proceedings of the International Colloguium on Bluff Body Aerodynamics and Its Applications(Elsevier). (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] 田村 幸雄,丸川 比佐夫,片桐 純治,後藤 周平: "煙突の渦励振応答の予測と設計式" 日本風工学会誌. 49. (1991)

    • Related Report
      1990 Annual Research Report
  • [Publications] Yukio TAMURA,Isao NISHIMURA: "Elastic Model fo Reinforced Concrete Chimney for Wind Tunnel Testing" Jouranal of Wind Engineering(日本風工学会誌). No.37. 395-400 (1988)

    • Related Report
      1989 Annual Research Report
  • [Publications] Yukio TAMURA,Isao NISHIMURA: "Elastic Model fo Reinforced Concrete Chimney for Wind Tunnel Testing" Proceedings of the International Colloquium on Bluff Body Aerodynamics and Its Applications(Elsevier). (1990)

    • Related Report
      1989 Annual Research Report
  • [Publications] Yukio Tamura.: Journal of Wind Engineering(日本風工学会誌). No.37. 395-400 (1988)

    • Related Report
      1988 Annual Research Report

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Published: 1989-04-01   Modified: 2016-04-21  

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