Journal of Wood Science

, Volume 56, Issue 3, pp 262–266 | Cite as

Simultaneous determination of shear strength and shear modulus in glued-laminated timber using a full-scale shear block specimen

  • Seiichiro Ukyo
  • Hirofumi Ido
  • Hirofumi Nagao
  • Hideo Kato
Note

Abstract

A newly developed full-scale shear block specimen was used to simultaneously determine the shear strength and shear modulus of glued-laminated timber. The shear modulus was calculated using the shear strain distribution measured by means of digital image correlation. To obtain the exact relationship between shear modulus and shear strength, the shear strain in the intended shear plane was measured. A relatively high correlation coefficient of 0.75 was found between the shear modulus and nominal shear strength in two types of glued-laminated timber tested: sugi (Cryptomeria japonica) and Douglas-fir (Pseudotsuga menziesii). Good correlation was also found between the density of middle lamina and shear strength. However, the relationships to density showed species dependence, which was not observed in the relationship between shear modulus and shear strength.

Key words

Full-scale shear block specimen Digital image correlation Shear modulus Shear strength Gluedlaminated timber 

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References

  1. 1.
    Okkonen EA, River BH (1989) Factors affecting the strength of block-shear specimens. For Prod J 39:43–50Google Scholar
  2. 2.
    Soltis LA, Rammer DR (1994) Shear strength of unchecked glued-laminated beams. For Prod J 44:51–57Google Scholar
  3. 3.
    Ido H, Nagao H, Kato H (2004) Evaluation of shear strength of sugi (Cryptomeria japonica) lumber using a full-scale block-shear test jig (in Japanese). Mokuzai Gakkaishi 50:220–227Google Scholar
  4. 4.
    Müller U, Sretenovic A, Gindl W, Teischinger A (2004) Longitudinal shear properties of European larch wood related to cell-wall structure. Wood Fiber Sci 36:143–151Google Scholar
  5. 5.
    Sretenovic A, Müller U, Gindl W, Teishinger A (2004) New shear assay for the simultaneous determination of shear strength and shear modulus in solid wood: finite element modeling and experimental results. Wood Fiber Sci 36:302–310Google Scholar
  6. 6.
    Divos F, Tanaka T, Nagao H, Kato H (1998) Determination of shear modulus on construction size timber. Wood Sci Technol 32:393–402Google Scholar
  7. 7.
    Ukyo S, Karube M, Harada M, Hayashi T, Murata K (2008) Determination of the shear modulus of wood with standard shear block specimen (in Japanese). J Soc Mater Sci 57:317–321CrossRefGoogle Scholar
  8. 8.
    Murata K, Masuda M, Ukyo S (2005) Analysis of strain distribution of wood using digital image correlation method: four-point bend test of timber including knots (in Japanese). Trans Visualiz Soc Jpn 25:57–63CrossRefGoogle Scholar
  9. 9.
    Popov EP (1998) Engineering mechanics of solids. Prentice-Hall, Englewood Cliffs, NJGoogle Scholar

Copyright information

© The Japan Wood Research Society 2009

Authors and Affiliations

  • Seiichiro Ukyo
    • 1
  • Hirofumi Ido
    • 1
  • Hirofumi Nagao
    • 1
  • Hideo Kato
    • 1
  1. 1.Forestry and Forest Products Research InstituteTsukubaJapan

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