Self-tapping screws and threaded rods as reinforcement for structural timber elements – A state-of-the-art report

Dietsch, Philipp; Brandner, Reinhard

doi:10.1016/j.conbuildmat.2015.04.028

Cited by 163 publications

(53 citation statements)

References 11 publications

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“…Recent research on self-tapping screws and long threaded rods has demonstrated the capability of these axially loaded fasteners to achieve effective connections by utilizing their high axial withdrawal capacity and stiffness. Currently, self-tapping screws and long threaded rods are mostly used as reinforcement of timber beams [6] or as connectors in a shear or axially loaded lap connections [7]. However, the performance of long threaded rods in moment resisting connections remains to be revealed.…”

Section: Paper I-2mentioning

confidence: 99%

Moment resisting splice of timber beams using long threaded rods and grout-filled couplers – Experimental results and predictive models

Cepelka

Malo

2017

Construction and Building Materials

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In order to achieve larger spans of timber arch bridges, glulam massive timber sections must be spliced on-site by moment resisting and rotationally stiff joints. In this paper, a novel timber splice connection utilizing long threaded rods and grout-filled couplers is presented. Flexural characteristics of the splice joint were investigated by full-scale experimental tests and 3D finite element models. An analytical model is proposed for determining the moment capacity and the rotational stiffness of the splice connection. The experimentally measured efficiency of the splice connection with regard to moment capacity and rotational stiffness was 69 % and 66 %, respectively.

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Section: Paper I-2mentioning

confidence: 99%

Moment resisting splice of timber beams using long threaded rods and grout-filled couplers – Experimental results and predictive models

Cepelka

Malo

2017

Construction and Building Materials

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“…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.…”

Section: Generalmentioning

confidence: 99%

“…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.…”

Section: Reinforcement In Tension Perpendicular To the Grainmentioning

confidence: 99%

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

Franke

Harte

2015

Construction and Building Materials

136

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“…STS featuring diameters up to 14 mm and lengths up to 1000 mm are produced today (Dietsch and Brandner 2015), what allows for the coupling of high beams and joints on large structures, fastening of CLT walls at the corners or even the fastening of sarking boards. STS mostly feature a continuous thread over the whole length leading to a more uniform load transfer between the screw and the wood material as well as a considerably enhanced axial load-carrying capacity.…”

Section: Introductionmentioning

confidence: 99%

Finite element modelling of inclined screwed timber to timber connections with a large gap between the elements

et al. 2016

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Since the 80's, Johanssen's Yield Theory has been adapted to fit new design practices: fastening of timber elements with a layer of insulation (or gap) between the elements or fastening with inclined fasteners. However no rules exist for connections with large gaps (up to 500 mm) and inclined fasteners. The behaviour of screwed connections (timber/large gap/timber) is modelled using an orthotropic material, cohesive surface, Hill criterion and a fictitious material that wraps the screw and models a complex medium where steel and wood interact. The calibrated FE model is finally compared to experimental results.

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Self-tapping screws and threaded rods as reinforcement for structural timber elements – A state-of-the-art report

Cited by 163 publications

References 11 publications

Moment resisting splice of timber beams using long threaded rods and grout-filled couplers – Experimental results and predictive models

Moment resisting splice of timber beams using long threaded rods and grout-filled couplers – Experimental results and predictive models

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

Finite element modelling of inclined screwed timber to timber connections with a large gap between the elements

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