Flexural Properties of Structural Laminated Bamboo/Solid Wood Composite Box Hollow Beams

結構用層積竹木複合箱型空心梁之抗彎性質

葉民權(Min-Chyuan Yeh) ； 洪偉誠(Wei-Chen Hong) ； 林玉麗(Yu-Li Lin)

《台灣林業科學》 24卷1期 (2009/03) Pp. 41-49

https://doi.org/10.7075/TJFS.200903.0041

摘要

本研究利用不同之配置方式層積孟宗竹構材，並作為結構用層積竹木箱型空心複合梁之梁翼材，同時採用柳杉材作為梁腹材，進行木材箱型空心複合梁之抗彎性質評估。結果顯示竹集成元分別採用水平或垂直層積組合之梁構材，透過抗彎試驗其指接效率為64.3及53.2%。在箱型空心複合梁方面，梁翼之集成竹構材分別以水平或垂直配置時，其最大抗彎承載力較柳杉梁翼箱型空心梁高31.3及49.7%。同時竹木箱型空心複合梁分別以10 d箱用釘或木螺釘在梁翼及梁腹介面補強時，將能優於實木箱型空心梁69.1及74.2%。基於撓度限制之設計，以集成竹作為梁翼之箱型空心梁具有1.85~2.09 kN m^(-1)之等效均布載重性能，且優於實木梁30.9~47.5%。

關鍵字

複合梁 ； 竹木箱型空心梁 ； 機械性質 ； 孟宗竹

並列摘要

Laminated Moso bamboo members were fabricated with different alignments and used as flanges with Japanese cedar lumber as web members to investigate the flexural performance of laminated bamboo/wood box hollow beams. The results showed that the efficiencies of finger joints in the bending tests were 64.3 and 53.2% for beams respectively laminated horizontally and vertically with bamboo laminae. The maximum bending capacities of the box hollow beams using laminated bamboo members either horizontally or vertically as flanges were 31.3 and 49.7%, respectively, higher than those of beams with Japanese cedar flanges. Furthermore, improved maximum bending capacities, of 69.1 and 74.2%, were respectively found for laminated bamboo/wood box hollow beams further reinforced with 10 d box nails and wood screws between the interface of the bamboo flange and solid wood web compared to that of solid wood box hollow beams. Based on the design deflection limitations, box hollow beams fabricated with laminated bamboo flanges can provide equivalent distributed loads of 1.85~2.09 KN m^(-1), corresponding to loads 30.9 to 47.5% higher than those of solid beams.

並列關鍵字

composite beam ； bamboo/wood box hollow beam ； mechanical property ； Moso bamboo