[Propriétés mécaniques du bois de Hinoki ancien provenant de bâtiments historiques japonais]
Le bois est present dans de nombreux objets du patrimoine en bois du Japon du fait de sa capacité à résister sur de longues durées. Toutefois, l'évolution de ses propriétés en usage demeure insuffisamment connue. La présente étude sur l'effet du vieillissement du bois tire parti du contexte japonais où les traditions constructives ont été maintenues depuis des siècles. Les essais de flexion 3 points ont été réalisés dans les directions longitudinale (L) et radiale (R) sur de petits échantillons de bois issus de 8 prélèvements historiques et d'une référence moderne considérée de la meilleure qualité par des restaurateurs. Bien que le bois âgé semble plus rigide et plus résistant que le bois récent, après correction sur la densité et l'humidité d'équilibre aucune variation significative de rigidité L et R, ni de résistance L n'est observée. Le comportement post-linéaire est par contre fortement influencé par l'âge du bois surtout dans la direction R où résistance et énergie de rupture décroissent fortement avec l'âge du bois, compté depuis l'âge d'abattage estimé. Le bois âgé en bon état de conservation peut être considéré comme sûr tant qu'il n'est pas sollicité perpendiculairement aux fibres.
Wood is present in many cultural heritage objects in Japan thanks to its capacity to resist over a long period of time. However, the evolution of its properties in regular use remains insufficiently known. The present study on the effect of wood aging takes advantage of the Japanese context where building traditions have been maintained for centuries. 3-point bending tests were performed in longitudinal (L) and radial (R) directions on small clear wood specimens cut from 8 historical samples and one modern reference considered of high quality by craftsmen. Although aged wood appeared more rigid and stronger than recent wood, after density and humidity corrections were applied no significant variation of L and R rigidity or L strength was observed. The post-linear behaviour, however, was drastically influenced by wood age especially in R direction where the strength and rupture energy decreased markedly with the time elapsed since the wood was processed. Well preserved aged wood considered as safe as long as it is not loaded perpendicular to grain.
Mot clés : Bois âgé, Hinoki (Chamaecydeparis obtusa), Horyu-ji, Propriétés mécaniques, Masse volumique
Misao Yokoyama 1 ; Joseph Gril 1, 2 ; Miyuki Matsuo 1 ; Hiroyuki Yano 1 ; Junji Sugiyama 1 ; Bruno Clair 2 ; Sigeru Kubodera 3 ; Takumi Mistutani 3 ; Minoru Sakamoto 4 ; Hiromasa Ozaki 4 ; Mineo Imamura 4 ; Shuichi Kawai 1
@article{CRPHYS_2009__10_7_601_0,
author = {Misao Yokoyama and Joseph Gril and Miyuki Matsuo and Hiroyuki Yano and Junji Sugiyama and Bruno Clair and Sigeru Kubodera and Takumi Mistutani and Minoru Sakamoto and Hiromasa Ozaki and Mineo Imamura and Shuichi Kawai},
title = {Mechanical characteristics of aged {Hinoki} wood from {Japanese} historical buildings},
journal = {Comptes Rendus. Physique},
pages = {601--611},
publisher = {Elsevier},
volume = {10},
number = {7},
year = {2009},
doi = {10.1016/j.crhy.2009.08.009},
language = {en},
}
TY - JOUR AU - Misao Yokoyama AU - Joseph Gril AU - Miyuki Matsuo AU - Hiroyuki Yano AU - Junji Sugiyama AU - Bruno Clair AU - Sigeru Kubodera AU - Takumi Mistutani AU - Minoru Sakamoto AU - Hiromasa Ozaki AU - Mineo Imamura AU - Shuichi Kawai TI - Mechanical characteristics of aged Hinoki wood from Japanese historical buildings JO - Comptes Rendus. Physique PY - 2009 SP - 601 EP - 611 VL - 10 IS - 7 PB - Elsevier DO - 10.1016/j.crhy.2009.08.009 LA - en ID - CRPHYS_2009__10_7_601_0 ER -
%0 Journal Article %A Misao Yokoyama %A Joseph Gril %A Miyuki Matsuo %A Hiroyuki Yano %A Junji Sugiyama %A Bruno Clair %A Sigeru Kubodera %A Takumi Mistutani %A Minoru Sakamoto %A Hiromasa Ozaki %A Mineo Imamura %A Shuichi Kawai %T Mechanical characteristics of aged Hinoki wood from Japanese historical buildings %J Comptes Rendus. Physique %D 2009 %P 601-611 %V 10 %N 7 %I Elsevier %R 10.1016/j.crhy.2009.08.009 %G en %F CRPHYS_2009__10_7_601_0
Misao Yokoyama; Joseph Gril; Miyuki Matsuo; Hiroyuki Yano; Junji Sugiyama; Bruno Clair; Sigeru Kubodera; Takumi Mistutani; Minoru Sakamoto; Hiromasa Ozaki; Mineo Imamura; Shuichi Kawai. Mechanical characteristics of aged Hinoki wood from Japanese historical buildings. Comptes Rendus. Physique, Volume 10 (2009) no. 7, pp. 601-611. doi : 10.1016/j.crhy.2009.08.009. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/j.crhy.2009.08.009/
[1] Aging and fossilization of wood and its components, Wood Sci. Technol., Volume 25 (1991), pp. 153-177
[2] J. Kohara, Study on the old timber, Research Report of the Faculty of Engineering, Chiba University 9 (15) (1958) 1–55 (in Japanese)
[3] Dendrochronology in Japan, Dohosya Press, Nara, 1990 Bulletin 48 (in Japanese)
[4] et al. Radiocarbon wiggle-matching of Japanese historical materials with a possible systematic age offset, Radiocarbon, Volume 49 (2007) no. 2, pp. 331-337
[5] M. Matsuo, et al., Evaluation of the aging wood from historical buildings as compared with the accelerated aging wood, analysis of colour properties (2009), submitted for publication
[6] Theory of X-ray measurement of microfibril angle in wood, For. Prod. J., Volume 16 (1966) no. 10, pp. 37-42
[7] et al. Method of determining the mean microfibril angle of wood over a wide range by the improved Cave's method, Mokuzai Gakkaishi, Volume 39 (1993) no. 4, pp. 375-381
[8] Mokuzai Kogyou Handbook, Maruzen Press, 2004 (in Japanese)
[9] et al. Mokuzai riyou-no kagaku, Kyoritsu Press, 1983 p. 38 (in Japanese)
[10] Predicting the effect of specific gravity, moisture content, temperature and strain rate on the elastic properties of softwood, Wood Sci. Technol., Volume 7 (1973), pp. 127-141
[11] Mécanique du Matériau Bois et Composites, Cépaduès-Editions, Toulouse, France, 1987
[12] Effect of moisture content and temperature on the mechanical properties of wood: An analysis of immediate effects, Wood Fiber, Volume 14 (1982) no. 1, pp. 4-36
[13] Studies on rheological properties of wood and structure of cell wall, Mokuzai Gakkaishi, Volume 17 (1971) no. 2, pp. 36-43 (in Japanese)
[14] et al. Studies on rheological properties of wood II – Effect of heat treating condition on the hygroscopicity and dynamic Young's modulus of wood, Mokuzai Gakkaishi (1962), pp. 29-33 (in Japanese)
[15] et al. Young's modulus of cell wall in soft wood, Nihon Reol. Gakkaishi, Volume 9 (1981) no. 4, pp. 169-175 (in Japanese)
[16] On the mechanical properties of Japanese Hinoki-wood, Mokuzai Gakkaishi, Volume 8 (1962) no. 1, pp. 7-12 (in Japanese)
[17] Cellular Solids, Structure and Properties, Cambridge University Press, 1997
[18] et al. Wood Structure, Buneido Press, 1985 p. 29 (in Japanese)
[19] Cell wall features with regard to mechanical performance. A review COST Action E35 2004–2008: Wood machining – Micromechanics and fracture, Holzforschung, Volume 63 (2009) no. 2, pp. 121-129
[20] Study on the old timber – Changes in chemical component, Mokuzai Gakkaishi, Volume 2 (1956) no. 5, pp. 191-195
[21] W. Ragil, et al., Evaluation of aged wood from historical Japanese buildings II – Changes in chemical component, in: Proceedings of the 57th Annual Meeting of the Japanese Wood Research Society, 2007
[22] M. Yokoyama, et al., Evaluation of aged wood from historical Japanese buildings I – Changes in mechanical properties of Hinoki wood, in: Proceedings of the 57th Annual Meeting of the Japanese Wood Research Society, 2007
[23] et al. Fourier transform infrared spectroscopic analysis of the degradation of structural lumber in Horyu-ji temple, Mokuzai Gakkaishi, Volume 43 (1997) no. 3, pp. 285-294 (in Japanese)
[24] Near-infrared spectroscopic comparison of antique and modern wood, Appl. Spectrosc., Volume 57 (2008) no. 11, pp. 1451-1453
[25] et al. The effect of aging on the ultrastructure of wood, Wood Sci. Technol., Volume 9 (1975), pp. 87-98
[26] Study on the old timber – Increasement in Young's modulus of heat-treated wood, Mokuzai Gakkaishi, Volume 1 (1955) no. 2, pp. 80-84 (in Japanese)
[27] M. Matsuo, et al., Colour changes in wood during heating: Kinetic analysis by applying time–temperature superposition method (2009), in preparation
Cité par Sources :
Commentaires - Politique