頁籤選單縮合
題名 | 臺灣杉、杉木、柳杉單株內木材強度變異性= |
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作者 | 唐讓雷; |
期刊 | 林產工業 |
出版日期 | 19891200 |
卷期 | 8:4 1989.12[民78.12] |
頁次 | 頁85-97 |
分類號 | 436.18 |
語文 | chi |
關鍵詞 | 木材; 杉木; 柳杉; 強度; 臺灣杉; |
中文摘要 | 本研究討論台灣杉、杉木與柳杉材之各強度性質,在單株內隨樹高及斷面部位之變異。各樹種異株間強度略有差異,但樹高及斷面變異之模式大致相同。台灣杉材強度隨樹高增加而增加,亦有資料顯示最大值在2/4樹高處,而基部值最低。杉木與柳杉材之差異顯著性分析顯示其材質較台灣杉為均勻,而一般而言,其強度亦隨樹高而漸增之趨勢。三樹種間,除剪力強度外,柳杉均較另二樹種具有較高測值,而剪力以杉木為最低。台灣杉與杉木均顯示強度隨髓心向邊材方向漸增之變異,而柳杉材則有相反之結果,試驗資料亦說明剪力強度在斷面變異上之極度不規則性。 |
英文摘要 | The main purpose of the study is to investigate the within trunk variation in the strength properties of wood from Taiwana, China fir, and Japanese fir. For the same species, the strength properties varied between tree but the variation patterns within trunk were similiar, however. The strength properties of Taiwania wood increased with the increase in the height position a trunk. The results also showed that the highest strength was found from the wood taken at the 2/4 height position. Both China fir and Japanese fir wood samples gave essentially the same trend of strength variation with height; i.e., increasing strength of wood with increasing the height of a tree.Besides shear strength, Japanese fir wood showed higher strengthes of wood than those of China fir and Taiwania. China fir had the lowest value among the three wood species studied.The results from both China fir and Taiwania indicated that the wood strength increased from the pith outwards. The reverse results were found from the test results the wood from Japanese wood. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。