Influence of geometric and mechanical parameters on stress states caused by threaded rods glued in wood

Martín, E; Estévez, Javier Lima; Otero, Déborah

doi:10.1007/s00107-013-0678-3

Cited by 23 publications

(12 citation statements)

References 14 publications

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“…As shown in Fig. 7, if the shear stress is in agreement with previous studies [18,19], the normal stress to the interface is more surprising and especially at the onset of the bonding, i.e. for the smallest values of z in Fig.…”

Section: Fem For a Temperature Of 20 1csupporting

confidence: 82%

Effect of temperature on the mechanical performance of glued-in rods in timber structures

Lartigau

Coureau

Morel

et al. 2015

International Journal of Adhesion and Adhesives

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Section: Fem For a Temperature Of 20 1csupporting

confidence: 82%

Effect of temperature on the mechanical performance of glued-in rods in timber structures

Lartigau

Coureau

Morel

et al. 2015

International Journal of Adhesion and Adhesives

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“…In all of the timber species tested, laminated as well as sawn, the average shear stress of joints fell as the slenderness (the ratio between the glued length and diameter) of the joint increased. However, in denser species this fall occurred at somewhat greater degrees of slenderness (Martín et al 2013;Otero-Chans et al 2008).…”

Section: Introduction: Traditional System-only Cylindrical Holesmentioning

confidence: 91%

Systems that improve the behaviour of joints made using glued-in rods

et al. 2019

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Joints made using glued-in rods have been the subject of many numerical and experimental studies. The joints most widely used are those known as cylindrical joints, i.e., joints made using cylindrical rods of constant cross-section that are inserted into cylindrical holes that also have a constant cross-section. Although no agreement has been reached at a European level that would allow their dimensions to be included in structural standards, there is agreement in the literature on the fact that joint strength does not increase in a linear way with length. It has also been found that there is a maximum joint length above which its withdrawal strength does not increase. After reviewing the literature on the use of glued-in rods, this paper classifies the papers that describe different alternatives to cylindrical holes that have been suggested to improve joint behaviour. These alternatives modify the shape of the rods or the holes, or use additional elements. The paper also describes the results of a broad experimental campaign, which performed a comparative analysis of different types of glued-in rods based on modifying the shape of the hole to increase joint load capacity without the need to use long anchorages. Three different forms of improvement were studied, using several different anchorage lengths and wood species. The results show alternatives that improve strength by up to 60% when compared with traditional joints and which can be used in different wood species at different slenderness values.

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“…The most commonly used rod material for GiR connections is steel [41], either threaded or smooth. The steel rod is mostly used for a number of reasons: i) the preferred failure mode of GiR is yielding of the rod rather than adhesive or wood brittle failure [42]; ii) mild steel rod provides ductility for this connection [43]; iii) they can withstand high axial forces [41]; and iv) they can easily be connected to other steel elements [9,10]. The threads on the steel rod ensure an effective mechanical interlock with the adhesive [10].…”

Section: Glued-in Rod Connections 221 Rod Materialsmentioning

confidence: 99%

“…Although the stress is distributed along the bonded length [44], there are stress concentrations at the face and bottom of the bored hole [43]. Therefore, the positioning of the rod is important to the performance of the joint [41].…”

Section: Glued-in Rod Connections 221 Rod Materialsmentioning

confidence: 99%

“…Although many studies e.g. [13,16,43,57] have shown that the GiR strength increase with the anchorage length, some studies have reported that this increase is not linear due to stress concentrations [43,58,59]. Gehri [45] suggested moving the anchorage zone of steel rod away from the surface of timber into the inner part by leaving a gap at the face of the drilled hole where no adhesive is applied along the anchorage length, thus preventing the mechanical interlock around this zone, see The rod diameter (d) is one of the most commonly investigated GiR parameters.…”

Section: Geometric Parametersmentioning

confidence: 99%

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Performance of glued-in-rod connections in cross-laminated timber

Gbenga¹

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The widespread availability of Cross-laminated timber (CLT) provides opportunities to extend the use of wood beyond traditional low-rise residential construction. Glued-in rods (GiR) are an interesting technical solution for numerous structural applications in timber engineering. Although GiR connections have the potential to be used in combination with CLT, research on this application is scarce. In this thesis, an experimental investigation on the performance of GiR in CLT is presented. Two different 5-ply CLT panel thicknesses (139 and 175 mm), two steel rod diameters (d = 12.7 and 19.1 mm) and five different anchorage lengths (la = 6d, 10d, 12d, 14d and 18d) were considered in single and multiple rod connections. A total of 260 specimens were fabricated and subsequently tested under uni-axial quasi-static monotonic tension. The results were assessed in terms of load-carrying capacity, stiffness and failure modes and demonstrated that GiR in CLT offer an alternative high capacity timber connection.

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Influence of geometric and mechanical parameters on stress states caused by threaded rods glued in wood

Cited by 23 publications

References 14 publications

Effect of temperature on the mechanical performance of glued-in rods in timber structures

Effect of temperature on the mechanical performance of glued-in rods in timber structures

Systems that improve the behaviour of joints made using glued-in rods

Performance of glued-in-rod connections in cross-laminated timber

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