合板の割裂強さを担う二軸配向と接着層の役割:- 鉄骨木質構造の研究 その8 - ALTERNATE PLIES AND ADHESIVE BONDS IN THE SPLITTING RESISTANCE OF PLYWOOD:— Study on steel-framed timber structures Part 8 —

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Author(s)

    • 桑村 仁 KUWAMURA Hitoshi
    • 東京大学大学院工学系研究科建築学専攻 教授・Ph. D. Prof., Dept. of Architecture, School of Engineering, The University of Tokyo, Ph. D.

Abstract

Strengths of plywood subjected to in-plane tension, bending, and interior pressure in a hole were experimentally investigated. The tested plywood is composed of nine plies of lauan veneer, and the plies are bonded together with melamine-urea-formaldehyde cocondensate adhesives. These tests, when the axis of tensile or bending specimen is inclined to the face grain, reveal the reason why plywood is so resistant against splitting failure is owing to the alternate perpendicular plies of veneer as well as the sufficient shear strength of adhesive bond. In such a case, the crack of veneer is interrupted by neighborhood veneer, and then the fracture path is associated with shear failure of the bond. In other words, either tensile or bending strength of such an inclined plywood member is substantially elevated by the shear strength of the bond. For the same reason, the holed plate under interior pressure does not split but experiences compressive yielding only if the edge distance is greater than double the diameter of the hole.

Journal

  • Journal of Structural and Construction Engineering (Transactions of AIJ)

    Journal of Structural and Construction Engineering (Transactions of AIJ) 76(663), 969-978, 2011

    Architectural Institute of Japan

Codes

  • NII Article ID (NAID)
    130004752446
  • NII NACSIS-CAT ID (NCID)
    AN10438559
  • Text Lang
    UNK
  • ISSN
    1340-4202
  • NDL Article ID
    11111230
  • NDL Source Classification
    ZN1(科学技術--建設工学・建設業)
  • NDL Call No.
    Z16-1419
  • Data Source
    NDL  J-STAGE 
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