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


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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  1. 1.
    Faherty KF, Williamson TG (1999) Wood engineering and construction. McGraw-Hill, New YorkGoogle Scholar
  2. 2.
    Rammer DR (2001) Effect of moisture content on nail bearing strength. Research Paper FPL-RP-591. Forest Products Laboratory, Forest Service, US Department of Agriculture, Madison, WIGoogle Scholar
  3. 3.
    Johansen KW (1949) Theory of timber connections. Int Assoc Bridge Struct Eng 9:249–262Google Scholar
  4. 4.
    Whale LRS, Smith I (1986) The derivation of design values for nailed and bolted joints in EUROCODE 5. Working Commission 18, Timber Structures, Meeting 19, International Council for Building Research Studies and DocumentationGoogle Scholar
  5. 5.
    Ehlbeck J, Werner H (1992) Softwood and hardwood embedding strength for dowel type fasteners. Working Commission 18, Timber Structures, Meeting 25, International Council for Building Research Studies and DocumentationGoogle Scholar
  6. 6.
    Soltis AL, Wilkinson TL (1991) United States adaptation of European yield model to large diameter dowel fastener specification. Proc Int Timber Eng Conf 3:43–49Google Scholar
  7. 7.
    Wilkinson TL (1991) Dowel bearing strength. Research Paper FPL-RP-505, Forest Products Laboratory, Forest Service, US Department of Agriculture, Madison, WIGoogle Scholar
  8. 8.
    Hirai T (1989) Basic properties of mechanical wood-joints II: bearing properties of wood under a bolt. Res Bull Coll Exp Forest Fac Agric Hokkaido Univ 46:967–988Google Scholar
  9. 9.
    Hirai T (1989) Rational testing methods for determination of basic lateral resistance of bolted wood-joints. Res Bull Coll Exp Forest Fac Agric Hokkaido Univ 46:959–966Google Scholar
  10. 10.
    European Committee for Standardization (1995) Eurocode 5. Design of timber structures European pre-standard ENV 1995-1-1: general rules and rules for building. CEN, European Committee for Standardization, BrusselsGoogle Scholar
  11. 11.
    American Society of Civil Engineers (1997) National design and specification for timber construction of US. American Society of Civil Engineers, New YorkGoogle Scholar
  12. 12.
    Soerianegara I, Lemmens RHMJ (eds) (1993) Timber trees: major commercial timbers. Plant resources of South-East Asia, vol. 5. Pudoc Scientific, Wageningen, p 432Google Scholar
  13. 13.
    Hirai T, Sawada M (1982) Some considerations on nail-wood bearing test. Mokuzai Gakkaishi 28:39–44Google Scholar
  14. 14.
    Harada M, Hayashi T, Karube M, Komatsu K (2000) Dowelbearing properties of glue laminated timber with a drift pin. Proceedings of World Conference on Timber Engineering, July 2000, British ColumbiaGoogle Scholar
  15. 15.
    Yasumura M, Daudeville L (1996) Fracture analysis of bolted timber joints under lateral force perpendicular to the grain. Mokuzai Gakkaishi 42:225–233Google Scholar
  16. 16.
    Reiterer A, Sinn G, Stanzl-Tschegg SE (2002) Fracture characteristics of different wood species under mode I loading perpendicular to the grain. J Mater Sci Eng A332:29–36CrossRefGoogle Scholar
  17. 17.
    Gattesco N (1998) Strength and local deformability of wood beneath bolted connectors. J Struct Eng 124:195–202CrossRefGoogle Scholar
  18. 18.
    Hirai T (1985) Nonlinear load-slip relationship of bolted woodjoints with steel side-members III. Advanced numerical analysis based on the generalized theory of beam on an elastic foundation. Mokuzai Gakkaishi 31:165–170Google Scholar
  19. 19.
    Foschi RO (1974) Load-slip characteristics of nails. J Wood Sci 7:69–74Google Scholar
  20. 20.
    Jensen JL (2005) Quasi-non-linear fracture analysis of the double cantilever beam specimen. J Wood Sci 51:566–571CrossRefGoogle Scholar

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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