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[1] Chaplain, M. & Valentin, G., Effects of relative humidity conditions on crack propagation in timber: Experiments and modeling. World conference Timber Engineering, pp. 1–8, 2010.
[2] EN 1995, EUROCODE 5: Design of timber structures – Part 1-1: General – commons rules and rules for buildings, 2004.
[3] Pambou Nziengui, C.F., Moutou Pitti, R., Fournely, E., Godi, G. & Dubois, F., Mechanical characterization of European species: Picea Alba mill and Douglas fir, SEMC, Cap-Town, September 2016.
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Open Access
Research article

Impacts of Climatic Changes and Creep Loadings on the Cracked Douglas (Pseudotsuga Menziesii) Timber Beam in Outdoor Conditions

Claude Feldman Pambou Nziengui1,2,
Rostand Moutou Pitti2,3,
Eric Fournely2,
Gaël Godi2
1
Laboratory for Research and Development of Wood Materials (LaReVa Bois) ENEF, Libreville, Gabon
2
Université Clermont Auvergne, CNRS, Institut Pascal, Clermont-Ferrand, France
3
CENAREST, IRT, Libreville, Gabon
International Journal of Computational Methods and Experimental Measurements
|
Volume 5, Issue 6, 2017
|
Pages 979-984
Received: N/A,
Revised: N/A,
Accepted: N/A,
Available online: N/A
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Abstract:

The Douglas is one of the most used species in France, especially in the Auvergne-Rhone Alpes Regions. This species found in unprotected outdoor environment is a major resource for the wood industry. However, variations in moisture content (MC), relative humidity (HR) and temperature (T) coupled with creep, can weaken its mechanical resistance. The main objective of this work is to study the mechanical behaviour of cracked wood beams under climate changes (T, HR and MC), the long-term loadings and the defects of wood (cracks, knots, orientation of annual rings etc). In this study, the evolutions of the crack length and the crack opening are presented. The results show the influence of climatic changes on the sustainability of timber structures of Douglas beams.

Keywords: climatic changes, crack propagations, douglas
References
[1] Chaplain, M. & Valentin, G., Effects of relative humidity conditions on crack propagation in timber: Experiments and modeling. World conference Timber Engineering, pp. 1–8, 2010.
[2] EN 1995, EUROCODE 5: Design of timber structures – Part 1-1: General – commons rules and rules for buildings, 2004.
[3] Pambou Nziengui, C.F., Moutou Pitti, R., Fournely, E., Godi, G. & Dubois, F., Mechanical characterization of European species: Picea Alba mill and Douglas fir, SEMC, Cap-Town, September 2016.
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Nziengui, C. F. P., Pitti, R. M., Fournely, E., & Godi, G. (2017). Impacts of Climatic Changes and Creep Loadings on the Cracked Douglas (Pseudotsuga Menziesii) Timber Beam in Outdoor Conditions. Int. J. Comput. Methods Exp. Meas., 5(6), 979-984. https://doi.org/10.2495/CMEM-V5-N6-979-984
C. F. P. Nziengui, R. M. Pitti, E. Fournely, and G. Godi, "Impacts of Climatic Changes and Creep Loadings on the Cracked Douglas (Pseudotsuga Menziesii) Timber Beam in Outdoor Conditions," Int. J. Comput. Methods Exp. Meas., vol. 5, no. 6, pp. 979-984, 2017. https://doi.org/10.2495/CMEM-V5-N6-979-984
@research-article{Nziengui2017ImpactsOC,
title={Impacts of Climatic Changes and Creep Loadings on the Cracked Douglas (Pseudotsuga Menziesii) Timber Beam in Outdoor Conditions},
author={Claude Feldman Pambou Nziengui and Rostand Moutou Pitti and Eric Fournely and GaëL Godi},
journal={International Journal of Computational Methods and Experimental Measurements},
year={2017},
page={979-984},
doi={https://doi.org/10.2495/CMEM-V5-N6-979-984}
}
Claude Feldman Pambou Nziengui, et al. "Impacts of Climatic Changes and Creep Loadings on the Cracked Douglas (Pseudotsuga Menziesii) Timber Beam in Outdoor Conditions." International Journal of Computational Methods and Experimental Measurements, v 5, pp 979-984. doi: https://doi.org/10.2495/CMEM-V5-N6-979-984
Claude Feldman Pambou Nziengui, Rostand Moutou Pitti, Eric Fournely and GaëL Godi. "Impacts of Climatic Changes and Creep Loadings on the Cracked Douglas (Pseudotsuga Menziesii) Timber Beam in Outdoor Conditions." International Journal of Computational Methods and Experimental Measurements, 5, (2017): 979-984. doi: https://doi.org/10.2495/CMEM-V5-N6-979-984
NZIENGUI C F P， PITTI R M， FOURNELY E， et al. Impacts of Climatic Changes and Creep Loadings on the Cracked Douglas (Pseudotsuga Menziesii) Timber Beam in Outdoor Conditions[J]. International Journal of Computational Methods and Experimental Measurements， 2017， 5(6)： 979-984. https://doi.org/10.2495/CMEM-V5-N6-979-984