Strengthening of timber structures with glued-in rods

Abstract

2The research and development of connecting and strengthening timber structural elements with

Mechanical Performance of Polyurethane and Epoxy Adhesives in Connections with Glued-in Rods at Elevated Temperatures

“…In parallel, numerous investigations have characterized the mechanical performance of these connections, which present a complex multi-material system. A number of influential parameters have been studied and summarized in the recent state-of-the-art reports by Steiger et al (2015) and Tlustochowicz et al (2011).…”

Failure modes and reinforcement techniques for timber beams – State of the art

“…Detailed descriptions of the different techniques and their design can be found in [9][10][11]. Reinforcement measures may be required in order to restore the structural capacity of damaged beams or to increase the capacity of intact beams.…”

“…Reinforced notches have enhanced load-bearing capacity but also display less brittle failure modes than is the case for unreinforced notches. For screws or glued-in rods, the requirements for minimum edge distances and spacing must be satisfied while keeping the reinforcement as close as possible to the notch corner [9,10]. Externally bonded sheets of FRP or plywood are placed on both sides of the beam and extend over the full height.…”

Pull-Out Strength of Steel Rods Bonded Into Mengkulang (Tarrietia Javanica) Glulam at Five Different Angles to the Grain

“…The threads on these rods offer mechanical interlocking between rod and adhesive, superior to common rebar and eliminates shear failure along the adhesive and rod interface (Steiger et al 2015). Threaded rods create an effective bonding of rod to timber due to its surface feature that provides more grips.…”

“…The GiR are used in heavy and huge timber construction which requires large load capacity of joint, coinciding with glulam (Gustafsson & Serrano 2000, Tanaka et al 2012, Dorn et al 2013). In addition, glued-in rod was purposely invented to strengthen the timber structure, especially to increase shear strength perpendicular to the grain (Harvey 2003, Za'ba et al 2013, Steiger et al 2015. The GiR are The design of a glued-in rod into timber, with respect to the grain, is critical as the capacity of the joint is highly dependent on the grain orientation.…”