柳杉集成元之配置對結構用集成材抗彎性質之影響

Effect of Lamina Configuration on the Bending Properties of Japanese Cedar Structural Glue-laminated Timber

李佳如(Chia-Ju Lee) ； 林蘭東(Lang-Dong Lin) ； 林志憲(Chih-Hsien Lin) ； 楊德新(Te-Hsin Yang)

《林產工業》 35卷1期 (2016/03) Pp. 11-19

https://doi.org/10.6561/FPI.2016.35(1).2

摘要

本研究以國產柳杉（Japanese cedar, Cryptomeria japonica）造林木作為結構用集成材之集成元，並經CNS14630針葉樹結構用製材分等標準進行集成元分等後，進行同等級與異等級結構用集成材之設計，並探討其集成元之構成對結構用集成材之性質影響。結果指出，以彈性模數分等方式或以非破壞試驗方式進行集成元等級區分，較目視分等為佳。此外，以E50級集成元以上等級所研製之同等級集成材均能符合E55-F225之最低強度要求；透過集成設計將高等級集成元配置於集成材之外側，研製成異等級集成材，則可有效提升國產柳杉中低等級材之應用性，本研究所設計之異等級集成材均可符合E55-F200之最低要求。

關鍵字

柳杉 ； 集成元 ； 結構用集成材

並列摘要

In this study, domestic Japanese cedar plantation wood was used as laminae of structural glue-laminated timber (glulam), after grading in accordance with CNS14630 standard, to construct homogeneous and heterogeneous-grade structural glued laminated timber, and the effect of laminae configuration on the bending properties of structural glulam was investigated. The experimental results indicated that grading by E-grading method or non-destructive method would distinct grades more effectively than visual grading did. Furthermore, homogeneous-grade glulam constructed using E-50 grade laminae could meet the minimum requirement of E55-F225 grade. Placing the laminae of higher grades near the two outer sides to develop heterogeneous-grade glulam would improve the efficiency of utilization for domestic Japanese cedar of medium-to-low grades. Those heterogeneous-grade glulam developed in this study could meet the minimum requirement of E55-F200 grade.

並列關鍵字

Japanese cedar (Cryptomeria japonica) ； Lamina ； Structural glue-laminated timber