Effects of the thickness of cross-laminated timber (CLT) panels made from Irish Sitka spruce on mechanical performance in bending and shear

Published Date
30 July 2016, Vol.116:141–150, doi:10.1016/j.conbuildmat.2016.04.145

Author 

Karol S. Sikora ^a,

Daniel O. McPolin ^b,

Annette M. Harte ^a,,

aNational University of Ireland, Galway, University Road, Galway, Ireland

bQueen’s University Belfast, University Road, Belfast BT7 1NN, UK

Received 3 February 2016. Revised 20 April 2016. Accepted 26 April 2016. Available online 4 May 2016. 

Highlights

• The thicker the CLT panel is, the lower its bending and rolling shear strength.
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  Rolling shear strength values for Sitka spruce of 1.0–2.0 N/mm².
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  ‘Global’ deformation results closely match theoretical stiffness.
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  Cross-lamination provides no strengthening effect for in-plane bending behaviour.

Abstrac 

An investigation was carried out on CLT panels made from Sitka spruce in order to establish the effect of the thickness of CLT panels on the bending stiffness and strength and the rolling shear. Bending and shear tests on 3-layer and 5-layer panels were performed with loading in the out-of-plane and in-plane directions. ‘Global’ stiffness measurements were found to correlate well with theoretical values. Based on the results, there was a general tendency that both the bending strength and rolling shear decreased with panel thickness. Mean values for rolling shear ranged from 1.0 N/mm² to 2.0 N/mm².

Keywords

Cross-laminated timber (CLT)

Engineered wood

Mechanical performance

Modulus of elasticity

Strength

Sitka spruce

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  Corresponding author.
  
  

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