Multi-scale model updating for the mechanical properties of cross-laminated timber. (December 2016)

• Record Type: Journal Article
• Authors: Saavedra Flores, E.I.; Ajaj, R.M.; Dayyani, I.; Chandra, Y.; Das, R.
• Is Part Of: Computers & structures. Volume 177(2016)
• Page Start: 83
• Page End: 90
• Publication Date: 2016-12
• Subjects: Cross-laminated timber -- Multi-scale modelling -- Finite elements -- Genetic Algorithm; Structural engineering -- Data processing -- Periodicals; Electronic data processing -- Structures, Theory of -- Periodicals; 624.171
• DOI: 10.1016/j.compstruc.2016.08.009
• Languages: English
• ISSNs: 0045-7949

Abstract

Highlights: A homogenisation-based four-scale model is proposed for cross-laminated timber. An optimisation strategy is adopted to calibrate the micro-mechanical parameters. The influence of wood density is investigated on the mechanical properties of CLT. Variations of the longitudinal and rolling shear moduli are also investigated. Our numerical predictions are compared successfully with experimental results. Abstract: In this paper we propose a homogenisation-based four-scale model for the mechanical properties of cross-laminated timber. The spatial scales considered in this study are the wood cell-wall, the wood fibres, growth rings and the structural scale. The computational homogenisation scheme is solved sequently from the lowest to the highest level in order to determine the effective mechanical properties of each material scale. As we are interested in improving the predictions of our computational simulations, we propose an optimisation strategy to calibrate the micro-mechanical parameters. Our numerical predictions are compared with experimental results and are validated successfully.