Analysis of cross-laminated timber by computational homogenisation and experimental validation

Published Date
March 2015, Vol.121:386–394, doi:10.1016/j.compstruct.2014.11.042

Author 

E.I. Saavedra Flores ^a,,

I. Dayyani ^b

R.M. Ajaj ^c

R. Castro-Triguero ^d

F.A. DiazDelaO ^e

R. Das ^f

P. González Soto ^a

aDepartamento de Ingeniería en Obras Civiles, Universidad de Santiago de Chile, Av. Ecuador 3659, Estación Central, Santiago, Chile

bCollege of Engineering, Swansea University, Singleton Park, Swansea SA2 8PP, United Kingdom

cAeronautics and Astronautics, University of Southampton, Southampton SO171BJ, United Kingdom

dDepartment of Mechanics, University of Cordoba, Campus de Rabanales, Cordoba CP 14071, Spain

eInstitute for Risk and Uncertainty, School of Engineering, University of Liverpool, Brownlow Hill, Liverpool L69 3GH, United Kingdom

fDepartment of Mechanical Engineering, University of Auckland, Auckland 1010, New Zealand

Available online 22 November 2014.

Abstract

In this paper we investigate the mechanical behaviour of cross-laminated timber panels by a computational homogenisation approach. A finite element procedure is adopted within a multi-scale modelling framework to determine the constitutive response of timber. As some of the microstructural parameters of wood are either not well-known or susceptible to considerable variation, we introduce uncertainty in the definition of the material. In order to validate the present multi-scale model, we measure experimentally the longitudinal Young’s modulus and density of sawn wood beams made of radiata pine. In addition, we carry out several experimental tests on cross-laminated timber panels subject to bending, shear and compression loads. Our numerical predictions are compared with the experiments and are validated successfully, revealing the potential predictive capabilities of the present multi-scale modelling for the analysis of wood materials and timber structures.

Keywords

Cross-laminated timber

Homogenisation

Multi-scale modelling

Finite element method

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