Journal of Wood Science

, Volume 53, Issue 3, pp 204–210 | Cite as

Bearing properties of Shorea obtusa beneath a laterally loaded bolt

  • Ali Awaludin
  • Watanachai Smittakorn
  • Takuro Hirai
  • Toshiro Hayashikawa
Original Article

Abstract

Empirical equations to determine the bearing strength have been proposed by many researchers and design standards. Because these equations have been developed mainly based on test results of softwood species, it is a matter of great importance (to ASEAN structural engineers) to verify the applicability of these equations for tropical hardwood species, which are commonly used in many ASEAN countries. In this study, wood specimens of Shorea obtusa (a tropical hardwood species) were used and the bearing test under full-hole confi guration was carried out for fi ve different loading angles to the grain. The bearing stress-embedment curve obtained from the test was approximated by a linear elastic-plastic diagram indicating the initial and fi nal stiffness of the curve. Testing showed that the average bearing strength parallel to the grain was 7.25% lower than the prediction given in Eurocode 5. The bearing strength perpendicular to the grain evaluated based on bearing load at initial cracking was substantially different from any predictions given by previous studies or design standards. It was also found that the bearing strength and initial stiffness from the bearing stress-embedment curve for loading at intermediate angles to the grain could be satisfactorily predicted with Hankinson’s formula.

Key words

Bearing strength Initial stiffness Loading angle to the grain Shorea obtusa 

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Copyright information

© The Japan Wood Research Society 2006

Authors and Affiliations

  • Ali Awaludin
    • 1
  • Watanachai Smittakorn
    • 2
  • Takuro Hirai
    • 3
  • Toshiro Hayashikawa
    • 1
  1. 1.Laboratory of Bridge and Structural Design Engineering, Graduate School of EngineeringHokkaido UniversityKita-ku, SapporoJapan
  2. 2.Graduate School of EngineeringChulalongkorn UniversityBangkokThailand
  3. 3.Graduate School of AgricultureHokkaido UniversitySapporoJapan

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