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1989 Fiscal Year Final Research Report Summary

Structural Application of Sealant to Make Flexible Joint System and Behavior of Joint

Research Project

Project/Area Number 62550414
Research Category

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

Allocation TypeSingle-year Grants
Research Field Building structures/materials
Research InstitutionTokyo Institute of Technology

Principal Investigator

TANAKA Kyoji  Tokyo Institute of Technology, Research Lab. of Engineering Materials, Associate Professor, 工業材料研究所, 助教授 (40016829)

Co-Investigator(Kenkyū-buntansha) OKAMOTO Hajime  Takenaka Komuten Co., Ltd., Takenaka Technical Research Laboratory, Researcher, 技術研究所, 研究員
HASHIDA Hiroshi  Tokyo Institute of Technology, Research Lab. of Engineering Materials, Research, 工業材料研究所, 助手 (20175532)
Project Period (FY) 1987 – 1989
KeywordsSealant / Structural sealant / Joint / Connection / Deformation / Load / Shape of bead / Dimension of joint
Research Abstract

Flexible joints made of sealants with various rectangular cross sections were investigated, and the results obtained are as follows.
(1) Mechanical behavior of a joint with various cross sections Mechanical behavior of a joint was mainly affected by modulus of a joint material and the shape of a bead. As for the latter, stress induced in a bead is depend on the ratio such as depth(D)/width(W) in tensile and compressive deformation, D^2/W in bending deformation. But, no dependence to the shape was observed in shearing deformation.
(2) Stress distribution in a bead deformed Stress in cross sectional area of a bead is gradually increasing from the center to the corner.
(3) Fatigue resistance of joint materials Cracks appeared at the both ends, near substrate, on the surfaces of a bead during fatigue operation, and the number of cycles till cracking (N) can be expressed the next equation , log N = -A log ( D^n/W ) + B :where A and B are constants.
(4) Load-deformation relation of a two dimensional structure with flexible joints Rigidity of a structure is much affected by the shape of a bead in addition to the modulus of a joint material. The structure becomes more rigid according to an increase of D or a decrease of W.
(5) Development of a new flexible joint system Based on the knowledge studied above, a new flexible joint system with higher degree of freedom was developed, and the behavior of the system was investigated.

  • Research Products

    (6 results)

All Other

All Publications (6 results)

  • [Publications] 小池迪夫、田中享二、橋田浩、林文秀: "シ-リングジョイントの耐疲労性に及ぼす断面形状の影響" 日本建築学会大会学術講演梗概集. A. 553-554 (1987)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Michio Koike: "Photo-Elastic Measurement of Surface Stresses on Sealing Beads Induced by Joint Expansion and Contraction" Report of the Research Laboratory of Engineering Materials,Tokyo Institute of Technology. 12. 197-203 (1987)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 田中享二、小池迪夫、橋田浩、岡本肇、林文秀: "矩形断面をもつシ-リングジョイントの耐疲労性に及ぼす形状・寸法の影響" 日本建築学会構造系論文報告集. 390. 10-16 (1988)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Michio KOIKE: "Durable Cross Sections of Sealing Beads against Joint Movement" Summaries of Technical Papers of Annual Meeting, Architectural Institute of Japan. A. 553-554 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Michio KOIKE: "Photo-Elastic Measurement of Surface Stresses on Selling Beads Induced by Joint Expansion and Contraction" Report of Research Lab. of Engineering Materials, Tokyo Institute of Technology. 12. 197-203 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kyoji TANAKA: "Fatigue Resistance of a Polysulfide Sealant Injected in Various Rectangular Cross Sections" Journal of Structural and Construction Engineering. 390. 10-18 (1988)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1993-03-26  

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