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Design method for steel framed members with variable cross-section considering inelastic earthquake response

Research Project

Project/Area Number 07555442
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section試験
Research Field 構造工学・地震工学
Research InstitutionDaido Institute of Technology

Principal Investigator

KOTOGUCHI Hisao  Daido Institute of Technology, Civil Engineering Dept., Professor, 工学部, 教授 (60047305)

Co-Investigator(Kenkyū-buntansha) HATANO Hideaki  Naka-Nihon Kensetsu Consultant Co, Ltd., Engineering Division, Head of Section, 設計部, 課長
MIZUSAWA Tomisaku  Daido Institute of Technology, Civil Engineering Dept., Professor, 工学部, 教授 (60113081)
MIKI Toshihiro  Daido Institute of Technology, Civil Engineering Dept., Associate Professor, 工学部, 助教授 (90137175)
波田野 英明  中日本建設コンサルタント(株), 設計部, 課長
Project Period (FY) 1995 – 1996
Project Status Completed (Fiscal Year 1996)
Budget Amount *help
¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 1996: ¥1,100,000 (Direct Cost: ¥1,100,000)
Keywordsframe / earthquake response / variable cross-section / connection / collapse modes / design method / 断面構造 / 断面構成 / 鋼製ラーメン / 非弾性地震応答
Research Abstract

This project studies the inelastic earthquake response of steel portal frames with variable cross-section numerically and experimentally. The conclusions can be summarized as follows :
(1) Experimental study
1) Six test specimens for variable cross-section frames were tested up to failure under the condition of constant vertical and alternating horizontal loads.
2) The three different collapse modes appeared due to the variable cross-section.
3) These test results were arranged to compare with the numerical results.
(2) Numerical study
1) Transformation matrix of web plates in shear is derived in order to consider the elasto-plastic behavior of beam-to-column connections as well as the vicinity of the center of beam.
2) Some appropriate parameters with respect to yielding of beam, columns and connections are defined to classify the collapse modes of frames.
3) The collapse mode with the plastic deformation only within the middle cross-section of columns is unfavorable, because the significant cumulative plastic strain leads to the local buckling.
4) The center part of beam cannot aid in energy dissipation without heavy damage due to the small resistance force.
5) The plasticity of the center of beam depends on the beam span-column depth ratio.
6) the damage at the center of beams of steel framed piers in Hyogoken-Nanbu Earthquake is highly related to the difference between the resistance forces of beams with variable cross-section and panel zones.
7) The favorable collapse pattern of portal frames is to restrict the plastic deformation within the column base part and panel zones of beam-to-column connections.
8) The fundamental idea for designing the variable cross-section is to dissipate energy in the cross-section with large resistant stress-resultants such as column base barts and panel zones.

Report

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

    (20 results)

All Other

All Publications (20 results)

  • [Publications] 酒造敏廣,事口壽男,長田好夫: "鋼変断面ラーメンの非弾性地震応答性状と崩壊モードに関する研究" 構造工学論文集,土木学会. 43. (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Miki,T.Kotoguchi,H.and Osada,Y.: "Inelastic Earthquake Response of Steel Portal Frames with Shear Collapse at Center of Beam" Proc.of Second Intermational Conference,Stessa '97,August,1997,Kyoto,Japan (to be published). (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 酒造敏廣,長田好夫: "鋼変断面ラーメンの非弾性地震応答性状と断面構成法に関する研究" 第23回地震工学研究発表会・講演概要,土木学会. 469-472 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 長田好夫,西澤功典,酒造敏廣,事口壽男,水澤富作: "はりのせん断崩壊を伴った門形ラーメンの非弾性地震応答に関する研究" 土木学会中部支部 平成7年度研究発表会・講演概要集,I-55. (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 長田好夫,酒造敏廣,事口壽男: "はり中央腹板の塑性せん断変形を伴う鋼変断面ラーメンの地震応答と損傷メカニズム" 土木学会第51回土木学会年次学術講演会・講演概要集,I-A67. (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 酒造敏廣,事口壽男,長田好夫: "繰り返し水平力を受ける鋼変断面ラーメンの非弾性応答実験" 土木学会中部支部,平成8年度研究発表会・講演概要集. (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Miki, T., Kotoguchi, H.and Osada, Y.: "Inelastic earthquake response and collapse modes of steel portal frames with variable cross-section" Proc.of JSCE Stuructural Engineering. Vol.43A. (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Miki, T., Kotoguchi, H.and Osada, Y.: "Inelastic earthquake response of steel portal frames with shear collapse at center of beam" Proc.of 2nd International Conference, Stessa. '97. (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Miki, T.and Osada, Y.: "Inelastic earthquake response and design method of steel portal frames with variable cross-section" Proc.of the 23rd JSCE Earthquake Engineering Symposium, Earthquake Engineering Committee, JSCE. 469-472 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Osada, Y., Nishizawa, K., Miki, T., Kotoguchi, H.and Mizusawa T.: "Inelastic earthquake response of portal frames with shear collapse in beam" Proc.of Annual Conference of JSCE Chubu Branch. I-55. (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Osada, Y., Miki, T., Kotoguchi : H: "Damage mechanism and Inelastic earthquake response of variable cross-section frames with shear collapse in beam" Proc.of JSCE Annual Conference. I-A67. (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Miki, T., Kotoguchi H.and Osada Y.: "An experimental study on Inelastic response of portal frames with variable cross-section sub-jected to horizontal cyslic load" Proc.of Annual Conference of JSCE Chubu Branch. (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 酒造敏廣,事口壽男,長田好夫: "鋼変断面ラーメンの非弾性地震応答性状と崩壊モードに関する研究" 構造工学論文集,土木学会. 43. (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] Miki,T.Kotoguchi,H.and Osada,Y.: "Inelastic Earthquake Resoponse of Steel Portal Frames with Shear Collapes at Center of Beam" Proc.of Second International Conference,'97,August,1997,Kyoto,Jaon (to be published).

    • Related Report
      1996 Annual Research Report
  • [Publications] 酒造敏廣,長田好夫: "鋼変断面ラーメンの非弾性地震応答性状と断面構成法に関する研究" 第23回地震工学研究発表会・講演概要,土木学会. 469-472 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 長田好夫,西澤功典,酒造敏廣,事口壽男,水澤富作: "はりのせん断崩壊を伴った門形弾性地震応答に関する研究" 土木学会中央支部 平成7年度研究発表会・講演概要集,I-55. (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 長田好夫,酒造敏廣,事口壽男: "はり中央腹部の塑性せん断変形を伴う鋼変断面ラーメンの地震応答と損傷メカニズム" 土木学会第51回土木学会年次学術講演会・講演概要集,I-A67. (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 酒造敏廣,事口壽男,長田好夫: "繰り返し水平力を受ける鋼変断面ラーメンの非弾性応答実験" 土木学会中央支部,平成8年度研究発表会・講演概要集. (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] 事口壽男,酒造敏廣,水澤富作,長田好夫,西澤功典: "はりのせん断崩壊を伴った門形ラーメンの非弾性地震応答に関する研究" 平成7年度土木学会中部支部・研究発表講演概要集. 53-54 (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] 事口壽男,酒造敏廣,長田好夫: "はり中央付近腹板の塑性せん断変形を伴う鋼製ラーメンの地震応答と損傷メカニズム" 土木学会・第51回年次学術講演会・講演概要集. (1996)

    • Related Report
      1995 Annual Research Report

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Published: 1996-04-01   Modified: 2016-04-21  

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