円孔内圧による木材の割裂:-鉄骨木質構造の研究 その5- SPLITTING OF WOOD BY PRESSURE IN A CIRCULAR HOLE:—Study on steel-framed timber structures Part 5—

Access this Article

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

A new test method for wood splitting was invented, in that hydrostatic pressure is introduced into a circular hole of a wood plate until splitting fracture takes place. Water pressure is applied to the wall of the hole through a soft balloon made of rubber, which generates uniform radial compression on the circumferential wall without friction. The splitting occurred at the coordinate where the tangent of the circle is right-angled to the grain of the wood, which was observed in the all specimens of Japanese cedar and SPF. The stresses around the hole were analyzed by means of Ikeda's formula in consideration of orthotropic elasticity of the woods, which revealed that the stress distribution around the circular hole is nearly equal to that of an isotropic plate. The stress criteria of fracture by Norris, Tsai-Hill, and Hoffman were examined, which demonstrated that the Hoffman equation incorporating tensile and compressive strengths is most favorable to predict the splitting strength of the holed wood plates subjected to the interior pressure.

Journal

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

    Journal of Structural and Construction Engineering (Transactions of AIJ) 75(647), 175-184, 2010

    Architectural Institute of Japan

Codes

  • NII Article ID (NAID)
    130004507759
  • Text Lang
    UNK
  • ISSN
    1340-4202
  • Data Source
    J-STAGE 
Page Top