You are being redirected because this document is part of your ASTM Compass® subscription.
    This document is part of your ASTM Compass® subscription.

    Volume 49, Issue 3

    Comparison of Test Methodologies for Computing Bending and Shear Stiffness of Cross-Laminated Timber

    (Received 3 March 2020; accepted 20 May 2020)

    Published Online: 03 August 2020

    CODEN: JTEVAB

      Format Pages Price  
    PDF (1.66 MB) 17 $25   ADD TO CART

    Cite this document

    X Add email address send
    X
      .RIS For RefWorks, EndNote, ProCite, Reference Manager, Zoteo, and many others.   .DOCX For Microsoft Word



    Abstract

    Current testing methods for evaluating the out-of-plane bending and shear stiffness terms of cross-laminated timber (CLT) materials use a relatively long span panel. When new CLT layups and composites are proposed, especially when manufactured from pilot-scale facilities, the length requirement may be a barrier for material property evaluation. The purpose of this paper was to compare current bending and shear stiffness test methods of CLT with alternative forms, including a simultaneous calculation method and the five-point bending test, which uses a shorter beam than current testing methods. Both experimental evaluation and finite element modeling of the mechanical properties were used to compare the proposed test methods. In general, numerical and experimental results demonstrated that effective bending stiffness (EIeff) values of CLT panels evaluated by different test methods were similar (maximum 12.7 % difference). Effective bending and shear stiffness values from the finite element method (FEM) agreed with experimental results. FEM demonstrated that both the simultaneous solution and the five-point bending test can be used as alternative test methods for evaluation of the bending and shear stiffness for CLTs. However, the effective shear stiffness values of CLTs from current industry standards were at least 450 % less than both the experimental evaluation and FEM prediction.

    Author Information:

    Hematabadi, Hojat
    Sustainable Biomaterials Department, Virginia Tech University, Blacksburg, VA

    Hindman, Daniel P.
    Sustainable Biomaterials Department, Virginia Tech University, Blacksburg, VA


    Stock #: JTE20200121

    ISSN:0090-3973

    DOI: 10.1520/JTE20200121

    Author
    Title Comparison of Test Methodologies for Computing Bending and Shear Stiffness of Cross-Laminated Timber
    Symposium ,
    Committee D07