Study of the Shear Performance of Glulam Joints Using Mechanical Connectors and Self-Tapping Screws

集成材以金屬連結件及自攻螺絲扣件接合之剪斷性能

葉民權(Min-Chyuan Yeh) ； 林玉麗(Yu-Li Lin) ； 黃健評(Gien-Ping Huang)

《台灣林業科學》 31卷2期 (2016/06) Pp. 119-133

https://doi.org/10.7075/TJFS.201606_31(2).0004

摘要

本研究開發鋼製及鋁製之兩種連結件，並應用自攻螺絲為扣件於柳杉集成材之接合，在剪斷試驗中採用H型結構，以不同數量之自攻螺絲組合成梁柱接合，用以探討其強度特性。在π型連結件方面，採用9或12支自攻螺絲接合之最大剪斷載重容量較6支試驗條件略有增進，以鳩尾型連結件組成之接合則較π型連結件接合有較大之初始剛性及延展性，但有較低之最大載重容量及降伏強度，以鋁製鳩尾型連結件組成之接合較鋼製鳩尾型連結件有其3倍之能量散逸。以強度極限法所推導之容許剪斷容量值，低於以降伏強度準則所決定之數值，約為平均最大剪斷載重值之2.85~32.5%，以π型接合之容許剪斷載重容量則高於鳩尾型接合42.4%。

關鍵字

接合強度 ； 集成材 ； 自攻螺絲 ； 柳杉

並列摘要

Two types of mechanical connectors, of either steel or aluminum, were developed with the application of self-tapping screws for Japanese cedar glulam member connections. The characteristic strength properties of a beam-column joint assembled using different numbers of self-tapping screws in an H-type structure were studied using a shear test. For the π-type connector, connections that used 9 and 12 self-tapping screws showed a slight improvement in the maximum shear loading capacity over the use of 6 screws. Connections assembled using a dovetail-type connector exhibited greater initial stiffness and ductility than the π-type connector, but had a lower maximum load capacity and yield strength. Joints assembled using the aluminum dovetail-type connectors dissipated energy 3 times more effectively than those assembled using steel dovetail-type connectors. The derived allowable shear capacity values for a connection, obtained from the strength limit, were lower than values derived using yield strength criteria and were about 28.5~32.5% of the average maximum shear load. The π-type connection showed a 42.4% higher allowable shear load capacity than that of dovetail-type connections.

並列關鍵字

joint strength ； glulam ； self-tapping screw ； Japanese cedar