Study of the Single Shear Performance of a Joint with a New Beech and Self-Tapping Screw Composite Dowel

Abstract

A new beech and self-tapping screw composite dowel is proposed and studied, its performance being compared with that of beech dowels and self-tapping screws alone. The single shear performance of components connected by composite dowels was tested. Results show that the dowels are a good choice for components requiring high stiffness. Screws remain a good choice for components requiring excellent seismic performance. Combination group presents similar maximum load stiffness to those of composite dowels, but other ductility parameters are superior for composite dowels. The best connection mode was provided by two composite dowels. Based on connecting two points, structural elements with two composite dowels showed much better load bearing ability than when joined by two beech dowels or by two self-tapping screws separately. The structural element with two composite dowels not only presented better initial stiffness, but also exhibited a better ductility coefficient and less energy consumption. So, the composite dowels can be used for beam column connection, dowel laminated timber, and restoration or enhancement of ancient buildings.

Influence of Dowel Center Spacing on Chamfered-Joint Components Made by Cupressus funebris Wood

“…Several researchers have studied the coupling effect of metal connectors, mortise, and tenon joints. Li et al [19,20] adopted the reinforcement method of a flat steel clip to improve the mechanical properties of mortise-and-tenon joints, whereas Zhu [20] adopted the composite method of beech wood and tapping screws to improve the strength of wood structures. In the numerical optimization of components, Smardzewski [21] studied the mechanical properties of joints of tenon shoulders without compression and obtained the related equations when the tenon shoulders without compression were subjected to bending.…”

Bearing capacity of L-shaped latticed joints connected by welding of screw-fitted dowels

“…According to the properties and performance of wood dowel and self-tapping screw, a new beech and self-tapping screw composite dowel was designed in a study by Xue et al (2022). Other studies have examined the single shear performance (Qian et al 2022;Zhu et al 2022).…”