Volume 3, Issue 1

    Torsional Shear Strength and Size Effect in Laminated Veneer Lumber

    (Received 15 October 2013; accepted 16 January 2014)

    Published Online: 2014

    CODEN: ACEMOAD

      Format Pages Price  
    PDF 12 $25   ADD TO CART


    Abstract

    This study investigates the effect that specimen depth has on the torsional shear strength of full-size Eastern Species Laminated Veneer Lumber (LVL). Characterization of this effect is valuable for structural design purposes as well as for use in constitutive modeling when predicting member strength of one depth based on member strength of a different depth derived from testing. To this end, torsion tests were carried out on three depths (140, 184, and 235 mm) of 1.98 m long by 44 mm thick 1.9E Eastern Species LVL. The shear strength of each depth was determined based on homogeneous, orthotropic theory for beams of rectangular cross-section. Despite a perceptible trend of slightly decreasing shear strength with increasing depth, an analysis of variance test indicated that no statistically significant depth effect exists as it relates to torsional shear strength. Further, a three dimensional finite element model of the 44 mm by 140 mm specimen indicated that stresses are uniform within the shear span of 2 times the depth plus the grip distance away from each end of the specimen. The predicted average maximum shear stress in this region compared well to the maximum shear stresses obtained experimentally.


    Author Information:

    Yang, Bonnie (Zhuo)
    Mississippi State University, Department of Forest Products, Mississipi State, MS

    Clouston, Peggi L.
    University of Massachusetts, Environmental Conservation, Amherst, MA

    Arwade, Sanjay R.
    University of Massachusetts, Civil and Environmental Engineering, Amherst, MA


    Stock #: ACEM20130108

    ISSN: 2165-3984

    DOI: 10.1520/ACEM20130108

    ASTM International is a member of CrossRef.

    Author
    Title Torsional Shear Strength and Size Effect in Laminated Veneer Lumber
    Symposium , 0000-00-00
    Committee D07