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Structural Design of Connections in Precast Reinforced Concrete Structures

Research Project

Project/Area Number 14550579
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Building structures/materials
Research InstitutionTokyo University of Science

Principal Investigator

MATSUZAKI Yasuhiro  Tokyo University of Science, Faculty of Eng., Professor, 工学部, 教授 (30138979)

Co-Investigator(Kenkyū-buntansha) NAKANO Katsuhiko  Niigata Institute of Technology, Faculty of Eng., Associate Professor, 工学部, 助教授 (80188995)
Project Period (FY) 2002 – 2003
Project Status Completed (Fiscal Year 2003)
Budget Amount *help
¥3,000,000 (Direct Cost: ¥3,000,000)
Fiscal Year 2003: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 2002: ¥2,400,000 (Direct Cost: ¥2,400,000)
KeywordsPrecast Reinforced Concrete / Connection / Shear transfer strength / Shear slipping displacement / Dowel action / Shear-key / Friction / Adherence / PCa接合部 / 接合筋のダボ抵抗 / シヤキーの直接せん断抵抗 / 圧縮軸力下の摩擦抵抗 / コンクリート面の固着抵抗 / せん断ズレ変形量 / 構成則 / あと施工アンカー
Research Abstract

Shear transfer across a definite interface must frequently be considered in the design of precast concrete connections. As the following various resistances in the effecting shear transfer strength are given : (1) dowel action, (2) shear-key, (3) friction with axial force, (4) adherence on the concrete surface. The purpose of this paper is to reveal the compound effects of the various resistance elements.
Basic experiments on the interface shear transfer at the precast joint faces were carried out. Fifteen panel type specimens with the same dimensions were tested.
The specimens used for investigation of the shear transfer mechanism consisted of two concrete blocks. The dimensions and reinforcement details of all the specimens were identical : the width of 900 mm, the height of 1400 mm, the thickness of 225 mm with an interface of 860 mm × 225 mm at the height of 700 mm from the base. The following parameters were investigated : (a) the kind of shear resistance in concrete connections [fr … More iction with axial force, dowel bar, shear-key, and compound of various elements], (b) the direct force acting transverse to the concrete interface [N=0,1500,-220 kN].
The friction with axial force can roughly be evaluated from the hysteresis loop as follows : (a) Friction can be estimated from the first positive maximum strengths of the specimens under different axial force levels, and the force is proportional to the axial force. (b) Friction with axial force under cyclic loading may be taken at the flat level during reloading to the opposite direction until it meets the original displacement.
The dowel action can roughly be evaluated from the hysteresis loop as follows : (a) Substantial stiffness decreases gradually. (b) The maximum shear displacement with cycling increases. (c) The pinching effect is very pronounced, and the area of hysteresis loops with cycling decreases.
The stiffness of the hysteresis loop is high and the displacement of that is minimal until the compressive failure of shear-key. The resistance after compressive failure is constant.
Research results lead to the following : (a) Total shear resistance can be evaluated as the sum total of each shear transfer element at the same shear displacement. (b) Dowel action is not influenced by compressive axial force. (c) Structural performance (resistance and stiffness) of shear-key increases by the compressive axial force.
Basic experiments on concrete connections were conducted on the shear transfer and the shear displacement behavior in concrete connections under shear and axial force. The following conclusions may be drawn.
(a) The shear transfer mechanism and shear slipping displacement behavior in concrete connections is clarified. And the shear transfer mechanism is verified by the structural experiments.
(b) The shear transfer strength can be evaluated as the sum total of each shear transfer element at the same shear displacement. The evaluation equation is also proposed. Less

Report

(3 results)
  • 2003 Annual Research Report   Final Research Report Summary
  • 2002 Annual Research Report
  • Research Products

    (8 results)

All 2004 2003 Other

All Journal Article (6 results) Publications (2 results)

  • [Journal Article] Design Method and Compound Effect Considering Deformation of Shear Transfer Elements in Precast Concrete Structure2004

    • Author(s)
      中野克彦, 松崎育弘
    • Journal Title

      13th World Conference on Earthquake Engineering, Vancouver, Canada

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Journal Article] 鉛直接合部を有するプレキャスト梁部材の曲げ・せん断性状に関する研究2004

    • Author(s)
      中野克彦, 岡野大志, 鈴木麻悠美, 杉山智昭, 松崎育弘
    • Journal Title

      日本建築学会大会学術講演梗概集 C-2

      Pages: 211-212

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Journal Article] Design Method and Compound Effect Considering Deformation of Shear Transfer Elements in Precast Concrete Structure2004

    • Author(s)
      Katsuhiko NAKANO, Yasuhiro MATSUZAKI
    • Journal Title

      13th World Conference on Earthquake Engineering, Vancouver, Canada

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Journal Article] Study on Flexural and Shear Performance of Precast RC Beams with Vertical Joint2004

    • Author(s)
      Katsuhiko NAKANO, Hiroshi OKANO, Ayumi SUZUKI, Tomoaki SUGIYAMA, Yasuhiro MATSUZAKI
    • Journal Title

      Summaries of Technical papers of Annual meeting Architectural Institute of Japan C-2

      Pages: 211-212

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Journal Article] 鉛直接合部を有するプレキャスト梁部材のせん断性状に関する研究2003

    • Author(s)
      鈴木麻悠美, 山口浩一郎, 中野克彦, 松崎育弘
    • Journal Title

      日本建築学会大会学術講演梗概集 C-2

      Pages: 55-56

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Journal Article] Study on Shear Transfer in Precast RC Beams with Vertical Joint2003

    • Author(s)
      Ayumi SUZUKI, Koichiro YAMAGUCHI, Katsuhiko NAKANO, Yasuhiro MATSUZAKI
    • Journal Title

      Summaries of Technical papers of Annual meeting Architectural Institute of Japan C-2

      Pages: 55-56

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] 中野克彦, 松崎育弘: "構造用接着系あと施工アンカーのせん断設計法に関する考察"日本建築学会大会学術講演梗概集. C-2. 653-654 (2002)

    • Related Report
      2003 Annual Research Report
  • [Publications] 松崎育弘, 中野克彦, 他2名: "プレキャストRC部材接合面におけるせん断力の伝達性状に関する研究"日本建築学会大会学術講演梗概集. C-2. 655-656 (2002)

    • Related Report
      2003 Annual Research Report

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Published: 2002-04-01   Modified: 2016-04-21  

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