頁籤選單縮合
題 名 | 孟宗竹集成工字樑之抗彎與剪斷效應=Bending and Shear Performance of I-beam Fabricated with Laminated Moso Bamboo |
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作 者 | 林裕祥; 陳周宏; 蔡崑堭; | 書刊名 | 林產工業 |
卷 期 | 22:2 2003.06[民92.06] |
頁 次 | 頁107-117 |
分類號 | 436.18 |
關鍵詞 | 孟宗竹集成材; 工字樑; 剪斷效能; Laminated Moso bamboo; I-beam; Shear performance; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究以虛宗竹集成材製造工字樑,評估不同樑腹厚度、樑腹型狀、及樑翼與樑腹間的接合型態對其剪斷應力抵抗的影響,並探討不同樑翼寬度對其樑腹剪斷強度的影響。最大破壞載重、靜曲破壞強度均隨著樑腹厚增厚而有顯著性增大的現象,樑腹厚度由2cm增為3cm時,載重、靜曲破壞強度之增量僅為1cm增厚為2cm之增大值的42%、33%。樑腹厚度為2cm之增大值與厚度1cm者的最大破壞載重、靜曲破壞強度僅有5%、4%的差異。而工字樑的樑翼寬度對午平剪斷破壞之彎曲載重的改善效果不顯著。樑翼和樑腹間的鑲入嵌接、木釘接合、側邊接合等接合等接合型態對山字樑最大破壞載重、靜曲破壞強度無顯著影響。樑腹厚度2cm之雙樑腹的最大破壞載重明顯較單樑腹者低25~31%。但厚度3cm者之雙樑腹的最大破壞載重較單樑腹者僅小9~13%。樑腹厚度2cm者有最大的水平剪斷強度110.6 kgf/cm^2,較厚度1cm、3cm者分別明顯高出6.9 kgf/cm^2、17.9 kgf/cm^2。樑翼寬度對其樑腹之水平剪斷應力抵抗並無顯著性影響。樑翼與樑腹間的接合型態對水平剪斷強度(τ xy m以無顯著性差異。樑腹厚度2cm之雙樑腹者的τ xy max較單樑腹者低26.5~35.8 kgf/cm^2。但厚度3 cm之雙樑腹的τ xy ' max較單樑腹者僅低8.0~11.9 kgf/cm^2。 |
英文摘要 | The effects of different web thickness, web pattern as well as joint type between flange and web on shear stress resistance of I-beam fabricated with laminated Moso bamboo, and effects of different flange width on shear strength of the web were evaluated in this paper. Maximum load at failure and modulus of rupture (MOR) significantly increased with web thickness, but amount of increasing load and MOR from web 2 cm increased to 3 cm in thickness was only 42% and 33 %, respectively, of those from web 1 cm increased to web 2 cm in thickness . Which was only 5% and 4% difference as compared to maximum load at failure and MOR of web 1 cm in thickness. And flange width of l-beam has no significant effect on improved bending load at horizontal shearing failure. There was no significant influence on maximum load at failure and MOR of l-beam for tenon" dowel and edge joint type between flange and web. Maximum load at failure of l-beam as double webs for thickness of 2 cm was 25% -31 % significant lower than that as single web. But that as double webs for thickness of 3 cm was only 9% -13% lower than that of single web. Maximum horizontal shearing strength of l-bearn was found as the web of 2 cm in thickness, and the values were 6.9 kgf/cm^2, 17.9 kgf/cm^2 higher than those of the web of 1 cm and 3 cm in thickness respectively. Flange width of l-bearn was no significant influence on the resistance of horizontal shearing stress on web. There was no significant effect in horizontal shearing strength of I-beam subjected to joint type between flange and web. Shearing strengthτ _(xy.max) in horizontal direction of l-beam as double webs for 2 cm in thickness was 26.5 kgf/cm^2 -35.8 kgf/cm^2 significantly lower than that of single web. But double webs for 3 cm in thickness was only 8.0 kgf/cm^2-11.9 kgf/cm^2 lower than single web. |
本系統中英文摘要資訊取自各篇刊載內容。