Load sharing and weakest lamina effects on the compressive resistance of cross-laminated timber under in-plane loading

Pang, Sung-Jun; Jeong, Gi Young

doi:10.1007/s10086-018-1741-9

Cited by 19 publications

(15 citation statements)

References 9 publications

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“…Cramer and Wolfe [32] applied this concept to predict load distributions among trusses of various stiffnesses. Pang and Jeong [33] also applied this concept to predict the compressive resistance of CLT. When a screw in hybrid CLT was withdrawal, the vertical deflections of all the layers in the hybrid CLT was identical.…”

Section: Prediction Modelmentioning

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 The parameters for the developed model were the withdrawal stiffness and strength that occurs when a screw is withdrawn, and the penetration depth of a screw in layers of a wood material.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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Section: Prediction Modelmentioning

confidence: 99%

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

et al. 2020

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“…3.3 Pang et al [10] for Compressive Strength Pang et al [10] proposed a method to calculate the compressive load capacity of CLT specimens made from Korean larch and pine. They evaluated the effect of varying grade within the CLT cross-section.…”

Section: Unterwieser Et Al [16] For Bending Tensile and Compressive Strengthmentioning

confidence: 99%

“…Similar effort for compressive strength properties parallel to the grain is lacking in literature, with a handful of research conducted by Oh et al [9] on Korean larch species, He et al [3] on Canadian hemlock no. 2 lumber and Pang et al [10] on Korean larch and pine species. Although these tests cover some Asian and Canadian timber species, test results on European species are absent in literature.…”

Section: Introductionmentioning

confidence: 99%

Comparative Study on Various Strength Parameters of Structural Elements Made from Cross-Laminated Timber

Anwar‐Us‐Saadat¹,

Goonewardena²,

Kafle³

et al. 2022

Journal of Renewable Materials

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Cross laminated timber (CLT) is an innovative and environment friendly engineered timber product with superior structural performance. CLT offers strong resistance against both in-plane and out-of-plane loading. Hence, it is widely used as floors, roofs or wall elements. Considerable experimental research on CLT under various loading conditions has been done in the recent past. This article presents a comprehensive review of various design methods to determine basic mechanical properties such as tension, compression and rolling shear strength of CLT with primary focus on Norway spruce. All relevant experimental data available from existing literature were collated and consequently been used to evaluate the performance of various methods to design CLT structures. The comparison revealed that different methods show considerable variance in predicting the capacity of CLT panels due to the variation in timber species, which affects the corresponding mechanical properties of the lamella. In addition to species, rolling shear properties can also vary considerably depending on the type of experimental technique used for testing. A predictive model has also been proposed to correlate rolling shear strength obtained from shear analogy method to that obtained using planar shear.

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“…Moment capacities of Ply-lam were predicted by using Eq. (5). It was assumed that the maximum stress occurs at the surface of the specimen (Fig.…”

Section: Characteristic Valuesmentioning

confidence: 99%

“…The development of cross-laminated timber (CLT) allowed the modern timber construction system more simple and competitive [1,2]. CLT has an odd number of layers stacked and the even layers crossed orthogonally [3][4][5]. The even layers can be glued with adjacent layers and a layer composes with several lumbers.…”

Section: Introductionmentioning

confidence: 99%

Moment and shear capacity of Ply-lam composed with plywood and structural timber under out-of-plane bending

et al. 2019

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The aim of this study was to investigate the moment and shear capacity of Ply-lam which is composed with plywood and structural timber. The moment and shear capacity of Ply-lam were predicted by using prediction methodologies for typical cross-laminated timber (CLT). The predicted values by the methodologies were verified by comparison with measured capacities. Fifty-eight specimens of Ply-lam (five layers) were manufactured and half of the specimens were tested for bending (span-to-depth ratio ( R sd ) was 25:1). The other specimens were tested for rolling shear ( R sd was 12:1) in accordance with EN 16351. The results show that typical prediction methods for structural properties of CLT can also be used to predict those of Ply-lam, since the measured values were higher than the predicted values. In rolling shear test, 52% specimens failed by bending at the bottom layer. This indicates that the rolling shear test method in EN 16351 was not suitable for Ply-lam because the typical CLT would be reinforced by replacing the cross layer with plywood. Thus, the span-to-depth ratio needs to be reduced for hybrid CLT like Ply-lam.

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Load sharing and weakest lamina effects on the compressive resistance of cross-laminated timber under in-plane loading

Cited by 19 publications

References 9 publications

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

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

Comparative Study on Various Strength Parameters of Structural Elements Made from Cross-Laminated Timber

Moment and shear capacity of Ply-lam composed with plywood and structural timber under out-of-plane bending

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