Prediction of compressive strength of cross-laminated timber panel

Oh, Jung-Kwon; Lee, Jun-Jae; Hong, Jung-Pyo

doi:10.1007/s10086-014-1435-x

Cited by 24 publications

(19 citation statements)

References 6 publications

(6 reference statements)

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“…CLT, when used as a wall panel, is subjected to tensile stress at the time of earthquake. With respect to CLT subjected to vertical loads, design procedures for compression members of CLT are described in the CLT handbook [3], and the compressive strength of CLT has been predicted using lamina property-based models by Oh et al [4]. A compression strength perpendicular to the grain of CLT has been evaluated by Serrano et al [5], Bogensperger et al [6], and Ido et al [7] in various CLT lay-up and loading conditions.…”

Section: Introductionmentioning

confidence: 99%

Effects of the width and lay-up of sugi cross-laminated timber (CLT) on its dynamic and static elastic moduli, and tensile strength

et al. 2015

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Cross-laminated timber (CLT) has recently emerged as a new wood product that utilizes a large quantity of domestic lumber. This study aims to analyze the effects of width and lay-ups on the tensile strength of CLT. To this end, the elastic modulus of sugi CLT with different lay-ups was measured by dynamic and static methods. Moreover, tensile tests were conducted for different widths and lay-ups of CLT. Results indicate that the apparent bending Young's modulus, as calculated using the dynamic method, is directly proportional to the measured Young's modulus in static method for each lay-up. Furthermore, there was no significant effect of width on the tensile strength in the range of 150, 300, and 600 mm. However, the variations in lay-ups affected the tensile strength as follows: CLT with larger ratio of the major strength direction lamina along the cross-section and with higher grade of lamina in the major strength direction showed higher tensile strength. The estimated tensile strength of CLT, as calculated using the Young's modulus of the lamina of each layer, and the tensile strength of lamina as simple substance was found to be in good agreement with the measured tensile strength of CLT.

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Section: Introductionmentioning

confidence: 99%

Effects of the width and lay-up of sugi cross-laminated timber (CLT) on its dynamic and static elastic moduli, and tensile strength

et al. 2015

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“…Several researchers [15][16][17][18] investigated to find suitable parametric models for representing strength properties of Korean species. Two parameter (2P) weibull distribution was revealed as a suitable model and Oh et al [8] and Pang et al [19] used this model to generate the compression and tensile strength of larch laminas. In this study, the compressive strengths for each lamina were also generated using two parameter (2P) Weibull distribution (Eq.…”

Section: Generation Of the Lamina Compressive Strengthmentioning

confidence: 99%

“…1) [7]. Oh et al [8] predicted the compressive strength of the CLT using this approach. The tested CLTs were three ply samples composed with one lamina grade (E11 from larch).…”

Section: Introductionmentioning

confidence: 99%

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

Pang

Jeong

2018

J Wood Sci

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A new approach was developed to predict the compressive resistance of cross-laminated timber (CLT) using the compressive strength of small samples of different grade lamina from E12 and E8 larch, and E10 and E6 nut pine. CLT of three different thicknesses was manufactured using different grades of laminas from each species. To evaluate the compressive resistance of CLT, three different methods were employed. The first method was used to determine the compressive resistance, which was predicted by multiplying the compressive strength of lamina aligned with the loading direction, and the cross-sectional areas of the lamina. The second method is similar to the first method, but additionally considering the stiffness ratio of the laminas. The third method developed from the current study accounts for load sharing and weakest lamina effects in the prediction of compressive resistance. When the lower 5th percentile compressive resistance in a major direction was predicted using the first two methods, the difference between the experimental test and the predicted value ranged from 2.5 to 43.4%. However, when the compressive resistance in a major direction was predicted using the developed method from the current study, the difference between the experimental test and predicted value ranged from − 8.7 to 10.8%.

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“…minimum) values are given for bending, tensile, and compressive strength [22]. A considerable advantage of laminated timber products is their reduced variability of mechanical properties [23], and this effectively increases the presumed fire resistance of laminated timber columns as compared to solid timber columns [7]. This is already accounted for in design recommendations [24].…”

Section: Thermal Deformations In Firementioning

confidence: 99%

Structural response of cross-laminated timber compression elements exposed to fire

Wiesner

Randmael

Wan

et al. 2017

Fire Safety Journal

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A set of novel structural fire tests on axially loaded cross-laminated timber (CLT) compression elements (walls), locally exposed to thermal radiation sufficient to cause sustained flaming combustion, are presented and discussed. Test specimens were subjected to a sustained compressive load, equivalent to 10 % or 20 % of their nominal ambient axial compressive capacity. The walls were then locally exposed to a nominal constant incident heat flux of 50 kW/m 2 over their mid height area until failure occurred. The axial and lateral deformations of the walls were measured and compared against predictions calculated using a finite Bernoulli beam element analysis, to shed light on the fundamental mechanics and needs for rational structural design of CLT compression elements in fire. For the walls tested herein, failure at both ambient and elevated temperature was due to global buckling. At high temperature failure results from excessive lateral deflections and second order flexural effects due to reductions the walls' effective crosssection and flexural rigidity, as well as a shift of the effective neutral axis in bending during fire. Measured average one-dimensional charring rates ranged between 0.82 and 1.0 mm/min in these tests. As expected, the lamellae configuration greatly influenced the walls' deformation responses and times to failure; with 3-ply walls failing earlier than those with 5-plies. The walls' deformation response during heating suggests that, if a conventional reduced cross section method (RCSM), zero strength layer analysis were undertaken, the required zero strength layer depths would range between 15.2 mm and 21.8 mm. Deflection paths further suggest that the concept of a zero strength layer is inadequate for properly capturing the mechanical response of fire-exposed CLT compression elements.

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Prediction of compressive strength of cross-laminated timber panel

Cited by 24 publications

References 6 publications

Effects of the width and lay-up of sugi cross-laminated timber (CLT) on its dynamic and static elastic moduli, and tensile strength

Effects of the width and lay-up of sugi cross-laminated timber (CLT) on its dynamic and static elastic moduli, and tensile strength

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

Structural response of cross-laminated timber compression elements exposed to fire

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