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A delaying and neutralizing procedure of bending brittle fracture of glulam beam with inserted steel plates

Research Project

Project/Area Number 15560392
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Civil engineering materials/Construction/Construction management
Research InstitutionAkita University

Principal Investigator

USUKI Seizo  Akitauniversity, Faculty of Engineering & Resource Science, Professor, 工学資源学部, 教授 (50006681)

Co-Investigator(Kenkyū-buntansha) GOTOU Fumihiko  Akitauniversity, Faculty of Engineering & Resource Science, Assistant Professor, 工学資源学部, 助手 (10261596)
SASAKI Takanobu  Akita Prefectural University, Institute of Woody Technology, Assistant Professor, 木材高度加工研究所, 講師 (00279514)
Project Period (FY) 2003 – 2005
Project Status Completed (Fiscal Year 2005)
Budget Amount *help
¥3,700,000 (Direct Cost: ¥3,700,000)
Fiscal Year 2005: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 2004: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 2003: ¥2,000,000 (Direct Cost: ¥2,000,000)
Keywordsmaterial / glulam beam / inserted steel plate / epoxy resin / ultimate load / yield point / non-linear / 降伏点 / 脆性破壊 / 衝撃せん断試験 / せん断強度 / エポキシー樹脂 / 衝撃せん断 / 鋼材 / 木材 / 樹脂 / 加速度
Research Abstract

The glulam beams having a cross section of 120mm × 60mm and a span of 216cm (the span by beam height equals 18) are arranged and the steel plates having a section of 40mm × 9mm are inserted to upper slits of beams and are glued with epoxy resin. On the other hand, one steel plate having the same section as upper steel plate is inserted and glued to lower slits of beams (Type-A), two steel plates having a section of 40mm × 4.5mm are inserted and glued to those (Type-B) and finally, three steel plates having a section of 40mm × 3mm are inserted and glued to those (Type-C). As a results, three types of glulam beams having different inserted steel plate layout in tension sides of beams are provided and tested under consentrated load at mid span.
Then, these have same bending rigidity, as they have same cross sectional area of steel plates in tension sides of beams. The average ultimate load of three Type-A beams is 25.9kN, that of Type-B is 27.1kN and that of Type-C is 30.7kN, respectively. The different of these ultimate loads are depending to yield points of steel plates. This is no doubt, as the load-srain curves of Type-A, B, C reveal non-linearity at different loading points of the curves. The ductile capacity is also follow the order of Type-C, Type-B and Type-A.
As a conclusion, if the glulam beams have same bending rigidity, the type having multiple inserted steel plates in tension side are superior in engineering ability.

Report

(4 results)
  • 2005 Annual Research Report   Final Research Report Summary
  • 2004 Annual Research Report
  • 2003 Annual Research Report
  • Research Products

    (2 results)

All 2005 Other

All Journal Article (1 results) Publications (1 results)

  • [Journal Article] Experimental and analytical study on steel deck-glulam beam hybrid bridge behavior2005

    • Author(s)
      薄木征三, 佐々木貴信, 他1名
    • Journal Title

      構造工学論文集 Vol.50A

      Pages: 1211-1218

    • Related Report
      2004 Annual Research Report
  • [Publications] 照井美貴夫, 薄木征三他1名: "鋼材と木材の接着に関する衝撃せん断試験"平成15年度東北支部技術研究発表会講演概要. 64-65 (2004)

    • Related Report
      2003 Annual Research Report

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Published: 2003-04-01   Modified: 2016-04-21  

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