Multiscale variability of stiffness properties of timber boards
Abstract
In the present paper the variability of strength and stiffness related properties of timber is analyzed and described. Thereby it is particularly focused on the influence of knots and knot clusters on the timber stiffness. The analysis takes basis in material property assessments of a sample of 30 timber board specimen. Each board is subdivided into sections with and without knot clusters. For each of these sections the stress-strain relationship is measured and the stiffness is estimated. Based on the stiffness estimates a hierarchical model for the multi-scale variability of stiffness is developed that includes an explicit representation of the stiffness variability between boards and the stiffness variability within boards. The parameters of the model are presented together with the corresponding uncertainties. The presented model can be used e.g. as an input for a more refined probabilistic representation of the load bearing capacity of glued laminated timber. in previous studies to describe the within member variability of strength (Czmoch et al. 1991, Isaksson 1999, Kohler 2006).
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Due to the large natural variability of the mechanical properties of timber and the duration of load effect, quantification of aging phenomena is difficult, and results of studies on the subject vary largely.
“Due to the large natural variability of the mechanical properties of timber [19,20] and the DOL effect, the quantification of the aging phenomena is difficult, and therefore, the results of the studies on the subject vary largely.”
From Bending Properties and Vibration Characteristics of Dowel-Laminated Timber Panels Made with Short Salvaged Timber Elements (2023) · cites this paper as [20]
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Design for adaptability, disassembly and reuse – A review of reversible timber connection systems
Ottenhaus, L.-M., Yan, Z., Brandner, R., Leardini, P., Fink, G., & Jockwer, R. (2023) · Construction and Building Materials · doi:10.1016/j.conbuildmat.2023.132823 · Cited by 100 · see citing works
Self-citationGiordano, L., Derikvand, M., & Fink, G. (2023) · Buildings · doi:10.3390/buildings13010199 · Cited by 28 · see citing works
“Due to the large natural variability of the mechanical properties of timber [19,20] and the DOL effect, the quantification of the aging phenomena is difficult, and therefore, the results of the studies on the subject vary largely.”
Self-citationSousa, H. S., Machado, J. S., Branco, J. M., & Lourenço, P. B. (2015) · Construction and Building Materials · doi:10.1016/j.conbuildmat.2015.05.127 · Cited by 16 · see citing works
- Authors
- Fink, G., & Kohler, J.
- ORCID
- Fink, G
- Venue
- Applications of Statistics and Probability in Civil Engineering
- Publisher
- CRC Press
- Published
- 2011-07-19
- Pages
- 1369-1376
- OpenAlex
- W2505943510
- Cited by
- 17
- References
- 0
- Citations by year
- 2026: 1 · 2024: 1 · 2023: 3 · 2022: 1 · 2021: 3 · 2018: 1 · 2015: 4 · 2014: 3
- FWCI
- 3.93
- Type
- book chapter
- Language
- en
- Open access
- closed
- Locations
- CRC Press eBooks (publishedVersion)
- Topics
- Physical Sciences › Engineering › Building and Construction › Wood Treatment and Properties
- Social Sciences › Decision Sciences › Statistics, Probability and Uncertainty › Probabilistic and Robust Engineering Design
- Life Sciences › Agricultural and Biological Sciences › Plant Science › Bamboo properties and applications
- Keywords
- multi-scale variability, knots, stress-strain behavior, hierarchical models, bearing capacity, glued laminated timber, uncertainty quantification
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