Cross laminated timber (CLT): Design approaches for dowel-type fasteners and connections

Ringhofer, Andreas; Brandner, Reinhard; Blaß, Hans Joachim

doi:10.1016/j.engstruct.2018.05.032

Cited by 69 publications

(44 citation statements)

References 6 publications

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“…Similar discovery was obtained in [3]. This ductile behaviour of CLT is due to the orthogonal layup where transverse layers act as reinforcement and prevent early failures in tension perpendicular to grain and block or row shear [3]. However, there was not obvious differences of loaddisplacement curve between CLT and GLT under 90° loading due to most of transverse layers bearing the embedment, Fig.…”

Section: Load-displacement Behaviour and Failure Modesupporting

confidence: 73%

“…7(a). Similar discovery was obtained in [3]. This ductile behaviour of CLT is due to the orthogonal layup where transverse layers act as reinforcement and prevent early failures in tension perpendicular to grain and block or row shear [3].…”

Section: Load-displacement Behaviour and Failure Modesupporting

confidence: 67%

“…Compared with solid timber (ST) and glued-laminated timber (GLT), CLT has some characteristics in configuration, such as gaps or edgegluing between lumbers in the same layer, potential stress reliefs in lumber and orthogonal layup of CLT. Previous researches had verified that these characteristics had effects on the physical and mechanical properties of CLT [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

“…The orthogonal layup makes the connection properties of CLT complicated due to the significant differences of embedment strength, deformation ductility and failure modes between longitudinal and transverse layers. The existence of transverse layers would reduce the embedment strength and improve the failure ductility of CLT under embedment tests [3]. Furthermore, the normal CLT panel has layers oriented perpendicular to each other, however, in special configurations, consecutive layers may be placed in the same direction, giving a double layer (e.g.…”

Section: Introductionmentioning

confidence: 99%

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Embedment Strength of Cross-Laminated Timber for Smooth Dowel-type Fasteners

Dong

Zhang

et al. 2019

MATEC Web Conf.

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Embedment strength is a significant property in the dowel type connection in timber structure, i.e. cross-laminated timber (CLT). The CLT design properties are different from those of sawn timber (ST) and glued-laminated timber (GLT) because of the orthogonal structure, which may particularly have influence on the design of connections. The layup feature, i.e. the thickness ratio of transverse layer (TRTL) was considered as an effective factor on CLT embedment strength in this study, except for other factors, i.e. wood density, smooth dowel diameter, and loading angle. Approximate 660 embedment tests were performed according to ASTM D5764 half-hole test method. A few of existing design models for CLT embedment strength were evaluated using experimental data. It was found that different factors had different effect tendency and each factor had statistically significant impact on CLT embedment strength. The embedment strength and failure modes of CLT were obviously different from those of GLT due to the existence of transverse layer in CLT. The existing design equations should be improved. Based on the test results, a new design equation was proposed which had better prediction.

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Section: Load-displacement Behaviour and Failure Modesupporting

confidence: 73%

Section: Load-displacement Behaviour and Failure Modesupporting

confidence: 67%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Embedment Strength of Cross-Laminated Timber for Smooth Dowel-type Fasteners

Dong

Zhang

et al. 2019

MATEC Web Conf.

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“…In the case of CLT, the withdrawal strength of screws is affected by the density of the layer of the wood material [21]. There have been attempts to improve the CLT's performance and cost competitiveness by changing the cross layer to plywood or LVL.…”

Section: Introductionmentioning

confidence: 99%

Prediction of withdrawal resistance for a screw in hybrid cross-laminated timber

et al. 2020

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The aim of this study was to predict the withdrawal resistance of a screw in hybrid cross-laminated timber (CLT) composed of two types of lamina layers. A theoretical model to predict the withdrawal resistance was developed from the shear mechanism between a screw and the layers in hybrid CLT. The parameters for the developed model were the withdrawal stiffness and strength that occurs when a screw is withdrawn, and the penetration depth of a screw in layers of a wood material. The prediction model was validated with an experimental test. Screws with two different diameters and lengths (Ø6.5 × 65 mm and Ø8.0 × 100 mm) were inserted in a panel composed of solid wood and plywood layers, and the withdrawal resistances of the screws were evaluated. At least 30 specimens for each group were tested to derive the lower 5th percentile values. As a result, the developed model predictions were 86–88% of the lower 5th percentile values of hybrid CLT from the properties of the lamina layer. This shows that the withdrawal resistance of hybrid CLT can be designed from the properties of its layer.

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In Brettsperrholz eingeklebte Stahlgewindestäbe – Experimente, numerische Simulation und Traglastbestimmung

Vallée

Tannert

2022

Bautechnik

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Aufgrund des wachsenden Umweltbewusstseins in der Baubranche in Verbindung mit der zunehmenden Urba nisierung wird der nachwachsende Werkstoff Holz dank seines geringen ökologischen Fußabdrucks immer stärker in den Fokus gerückt [1]. Holzwerkstoffe, insbesondere Brettsperrholzplatten (BSP) und Brettschichtholz (BSH), bieten Architekten und Ingenieuren die Freiheit für kon struktive Anwendungen im Hochhausbau. BSP wird v. a. als großformatiges Wand, Boden und Dachelement in ein und mehrstöckigen Gebäuden, Hal len und Brücken eingesetzt. Obwohl das Produkt erst seit ca. 30 Jahren auf dem Markt ist, hat es den Holzbausek tor in vielerlei Hinsicht nachhaltig verändert, z. B. weil es Architekten erlaubt, in Flächen und Volumen statt in Li nien zu denken, indem es eine extrem schnelle, trockene, saubere und hochpräzise Konstruktion ermöglicht oder durch die Bereitstellung aller handwerklichen Voraus setzungen für eine einfache und schnelle Montage und Installation von zusätzlichen Schichten (z. B. Dämmung) und Haustechnik im Allgemeinen [2]. Um diesen Anfor derungen gerecht zu werden, bedarf es allerdings auch entsprechender hochleistungsfähiger Verbindungen. Zu diesen zählen die in diesem Beitrag thematisierten einge klebten Stahlgewindestäbe.

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Cross laminated timber (CLT): Design approaches for dowel-type fasteners and connections

Cited by 69 publications

References 6 publications

Embedment Strength of Cross-Laminated Timber for Smooth Dowel-type Fasteners

Embedment Strength of Cross-Laminated Timber for Smooth Dowel-type Fasteners

Prediction of withdrawal resistance for a screw in hybrid cross-laminated timber

In Brettsperrholz eingeklebte Stahlgewindestäbe – Experimente, numerische Simulation und Traglastbestimmung

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