本研究以國產柳杉作為結構用集成材為對象，主要探討非膠合之集成梁構件的靜曲行為，此構法以施工容易、可回收利用、減低對環境衝擊且具有結構性能。集成梁試體斷面尺寸為150 x 304 mm，跨距3600 mm，依據CNS 11031 集成12組對稱異等級結構用集成材之梁構件，配置等級分為E85-F255與E95-F270。集成材分別採用不同的集成工法，膠合構件之黏著劑作為集成元間的緊固機制，而非膠合構件則以橫貫緊固件提供集成元間的抗剪強度，本研究選用自攻螺絲與硬木榫作為橫貫緊固件，並以間距100 mm、150 mm與200 mm為配置參數；其中，硬木榫直徑為20 mm且鎖入間距為100 mm、150 mm與200 mm；自攻螺絲採用直徑8 mm且鎖入間距為100 mm、150 mm。接著藉由足尺的四點抗彎試驗獲得集成梁之剛度，並和歐洲規範5之有效抗彎剛度公式計算出理論值與實驗值相互比較。
實驗結果顯示膠連接能有效束制梁的彎曲變形，非膠合集成梁之剛度是膠合集成梁約13%。在相同緊固件的參數下，緊固件間距越小剛度增加，非膠合集成梁約提升二至三成的剛度值。緊固件之型式影響剛度值，硬木榫-非膠合集成梁之剛度平均高於約兩成自攻螺絲-非膠合集成梁試體。本研究主要討論荷載-撓度圖比例限度內之第一線性段，12組集成梁試體未達到極限破壞，僅有少數有明顯的劈裂情形，依木纖維方向並不屬於受拉側纖維破壞，說明梁未形成彎矩破壞。最後經由歐洲規範5之有效彎曲剛度公式計算的理論值以評估剪力連接機制的效益，其理論值高估於本研究之實驗值。本研究所獲得的實驗結果可作為未來開發與優化非膠合構件之參考數據。

The paper is focused on the composite behaviour of laminated wooden beams with different shear connections. According to CNS 11031, this study configures symmetric composition of heterogeneous-grade laminated beam, labelled as E95-F270 and E85-F255. The 12 laminated beams apply Taiwanese domestic wood, which is named Japanese cedar, and possess the cross-section of 150 mm x 308 mm and length of 3.6 m. Each beam is composed of eight laminas with thickness of 8 mm. The 12 specimens comprise three types of shear connections, i.e. adhesive, hardwood dowel and self-tapping screw (STS). Among the 12 beams, 6 of them are laminated by means of hardwood dowel whose diameter is 20 mm. The dowels are inserted 90-degree in one row with spacing of 10, 15 and 20 cm. Four beams are transversally laminated by STS whose diameter is 8 mm. The STS is drilled 90-degree to the laminas and its spacing is 10 cm and 15 cm. Two beams are bonded by resin as reference glulam. A four-point bending test rig is intended for estimating the flexural behaviour of the 12 beams. The deflection, load and relative displacement between laminas are recorded and collected simultaneously by data-logging system. These data are used to appraise the bending behaviour, particularly stiffness, of the beams with diverse laminating techniques. Besides the testing, an analytic verification is carried out based on Eurocode 5. The effective bending stiffness formula contributes to evaluate the EI values of each beam. Then, the testing results and theoretaicl values are compared to each other. The testing results indicate that, with the same grade, the stiffness can be achieved. Both non-glue laminated timber reveals the same trend. With the same spacing, the hardwood dowel provides higher stiffness than the STS does.

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