TRANSVERSE ISOTROPY MODELING OF 3-D GLULAM TIMBER BEAMS

The study establishes the validity of transverse isotropy, in the plane normal to the longitudinal fibers, for southern pine beams; and shows that Saint Venant's isotropic torsion solution accurately predicts the linear torsional responses of southern pine glulam (glued-laminated) beams, and that it can be used to compute the shear moduli of glulam beams. The experimental torsion program presented in this paper outlines a detailed procedure that can be used to determine the shear moduli in the radial (G sub LR) and tangential (G sub LT) directions for orthotropic wood samples of various species. It is shown that solid-sawn and glulam southern pine beams can be modeled as transversely isotropic. This assumption permits computing the shear modulus of timber beams from torsion test and Saint-Venant's isotropic torsion solution. By establishihg the applicability of the assumption to other wood species, the design shear moduli data, which are not available for most species, can be obtained from torsion tests of full size samples and statistical analyses.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/08991561
• Corporate Authors:

  American Society of Civil Engineers

  345 East 47th Street
  New York, NY  United States  10017-2398
• Authors:
  • Davalos, J F
  • Loferski, J R
  • Holzer, S M
  • Yadama, V
• Publication Date: 1991-5

Media Info

• Features: Appendices; Figures; References;
• Pagination: p. 125-139
• Serial:
  • Journal of Materials in Civil Engineering
  • Volume: 3
  • Issue Number: 2
  • Publisher: American Society of Civil Engineers
  • ISSN: 0899-1561
  • EISSN: 1943-5533
  • Serial URL: http://ascelibrary.org/journal/jmcee7

Subject/Index Terms

• TRT Terms: Beams; Gluing; Isotropy; Laminated wood; Mathematical models; Torsion
• Uncontrolled Terms: Models; Pine
• Subject Areas: Geotechnology; Highways; Materials; I35: Miscellaneous Materials;

Filing Info

• Accession Number: 00608015
• Record Type: Publication
• Files: TRIS
• Created Date: May 31 1991 12:00AM