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Buildings 2018, 8(10), 146; https://doi.org/10.3390/buildings8100146

Comparison of Theoretical and Laboratory Out-of-Plane Shear Stiffness Values of Cross Laminated Timber Panels

1
Department of Civil and Environmental Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada
2
Integrated Wood Engineering, University of Northern British Columbia, Prince George, BC V2L 1R6, Canada
*
Author to whom correspondence should be addressed.
Received: 21 September 2018 / Revised: 16 October 2018 / Accepted: 19 October 2018 / Published: 22 October 2018
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Abstract

The lay-up of cross laminated timber (CLT) leads to significant differences in properties over its cross-section. Particularly the out-of-plane shear behavior of CLT is affected by the changes in shear moduli over the cross-section. Results from laboratory shear tests are used to evaluate the shear stiffness of 3- and 5-layer CLT panels in their major and minor strength direction. The results are compared to calculated shear stiffness values on evaluated single-layer properties as well as commonly used property ratios using the Timoshenko beam theory and the shear analogy method. Differences between the two calculation approaches are pointed out. The shear stiffness is highly sensitive to the ratio of the shear modulus parallel to the grain to the shear modulus perpendicular to the grain. The stiffness values determined from two test measurements are compared with the calculated results. The level of agreement is dependent on the number of layers in CLT and the property axis of the CLT panels. View Full-Text
Keywords: cross-laminated timber (CLT); out-of-plane shear stiffness; Timoshenko beam theory; shear analogy method; rolling shear modulus cross-laminated timber (CLT); out-of-plane shear stiffness; Timoshenko beam theory; shear analogy method; rolling shear modulus
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Niederwestberg, J.; Zhou, J.; Chui, Y.-H. Comparison of Theoretical and Laboratory Out-of-Plane Shear Stiffness Values of Cross Laminated Timber Panels. Buildings 2018, 8, 146.

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