Experimental study on bending properties of cross-laminated timber-bamboo composites

Dong, Weiqun; Wang, Zhiqiang; Zhou, Jianhui; Gong, Meng

doi:10.1016/j.conbuildmat.2021.124313

Cited by 39 publications

(13 citation statements)

References 27 publications

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“…It is a type of commercial softwood tree species combination wood, with white and clean material appearance, close and meticulous texture, small scar appearance, high strength to weight ratio, and strong nail holding capability (Di and Zuo 2021;Xiao et al 2021). Moreover, SPF is widely used in the construction industry, and could be used in important structural components such as beams and columns (Xiao et al 2017;Wang et al 2019b;Dong et al 2021).…”

Section: Methodsmentioning

confidence: 99%

Uplift capacity evaluation of light-framed wood structure’s roof-to-wall connections

Yao

Song

et al. 2022

BioRes

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The load-displacement curves of six types of roof-to-wall connection joints were obtained through uplift experiments, while the mechanical properties of each type of joint were compared and analyzed, and the applicability of each joint was verified by the Foschi load-displacement curve model simulation. The specimens were made of three kinds of wood (Pinus sylvestris (PS), Spruce-Pine-Fir (SPF), and Douglas fir (DF)) and two different metal connectors (A-type and B-type), and then the monotonic pullout tests were conducted on each specimen. The failure modes of each group of specimens were analyzed, and the characteristic values analysis method was used to analyze and compare the characteristic values of the load-displacement curves of each specimen, including six characteristic values: maximum load, yield load, deformation capacity, energy dissipation capacity, ductility ratio, and initial stiffness. The results showed that the load capacity of TA group (specimens with A-type metal connectors) was much greater than that of TB group (specimens with B-type metal connectors). The specimens made of DF had the best mechanical performance, but the specimens of DF group were prone to brittle failure. Finally, the fitting parameters of the Foschi model applicable to such joints were obtained.

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Section: Methodsmentioning

confidence: 99%

Uplift capacity evaluation of light-framed wood structure’s roof-to-wall connections

Yao

Song

et al. 2022

BioRes

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“…Therefore, it is reasonable to infer that the BSSmajor of CLBT can be significantly enhanced when the flattened bamboo board is used as a transverse laminate. Dong et al [20] and Wei et al [44] have tried using bamboo as the transverse layer of CLBT panels to improve bearing capacity in the major strength direction. [26], Larix kaempferi CLT [30], Kedondong CLT [33], Eucalyptus CLT [43].…”

Section: Bonding Shear Performance With Different Loading Directionsmentioning

confidence: 99%

“…It can greatly increase bamboo utilization, reduce adhesive use, retain the natural texture of bamboo, and offer opportunities to convert bamboo to higher-value building products [15,16]. Recently, a series of engineered bamboo products have been reported for CLBT or CLB preparation, e.g., bamboo strip [17,18], bamboo parallel strand lumber [19], bamboo scrimber [20], bamboo curtain [6,21], glued laminated bamboo [22], and flattened bamboo [22][23][24]. However, the current research on CLBT focuses mainly on its mechanical properties, and to date, bond performance has scarcely been reported.…”

Section: Introductionmentioning

confidence: 99%

Bond Quality and Durability of Cross-Laminated Flattened Bamboo and Timber (CLBT)

Yang

Fei

et al. 2022

Forests

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To achieve value-added utilization of domestic bamboo and plantation wood resources, this study investigated the feasibility of using flattened bamboo and Chinese fir for manufacturing cross-laminated bamboo and timber (CLBT). Two types of adhesives, one-component polyurethane (PUR), and phenol resorcinol formaldehyde (PRF), and three applied pressure parameters (0.6, 0.8, and 1.0 MPa) were used to fabricate small CLBT panels (375 mm × 500 mm). In this study, block shear and delamination tests were conducted to examine the bond quality and durability of CLBT panels. The results showed that a significant difference in the bonding shear strength (BSS) in both directions. The bonding shear strength in the minor strength direction (BSSminor) was 1.81–3.45 times higher than the bonding shear strength in the major strength direction (BSSmajor). The adhesive type was the major factor affecting the bond quality and delamination, while the bonding pressure had no significant effect on the bond quality and delamination. Compared with PRF adhesives, CLBT specimens prepared from PUR had higher bonding shear strength (BSS) and wood failure percentage (WFP). However, the durability of delamination specimens prepared by PUR was not as good as layered specimens prepared by PRF.

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“…This makes CLT suitable for use in load-bearing structural elements such as floor, roof and shear wall components [7]. CLT was developed from softwood species in the European construction market in the early 1990s [8,9]. Spruce-pine-fir and Norway spruce are the common types of species for CLT manufacturing in North America and Europe, respectively [9].…”

Section: Introductionmentioning

confidence: 99%

“…CLT was developed from softwood species in the European construction market in the early 1990s [8,9]. Spruce-pine-fir and Norway spruce are the common types of species for CLT manufacturing in North America and Europe, respectively [9]. Manufacturing CLT panels has provided many benefits to the timber industry by turning low-value products from eucalypt plantations into a practical product.…”

Section: Introductionmentioning

confidence: 99%

Rolling Shear Properties of Cross-Laminated Timber Made from Australian Plantation Eucalyptus nitens under Planar Shear Test

Ettelaei

Taoum

Shanks

et al. 2022

Forests

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With the increasing availability of fast-growing Eucalyptus plantation logs in Australia in recent years, the timber manufacturing sector has become interested in discovering the opportunities of producing value-added timber products from this resource. Cross-laminated timber (CLT) could be a potential sustainable product recovered from this resource and supply material for commercial buildings. Shear of the inner cross-laminates, known as rolling shear, is one of the governing factors in serviceability and limit state design for this product under out-of-plane loading. This study evaluated the rolling shear (RS) properties of CLT with heterogonous layup configurations using different structural grade Eucalyptus nitens (E. nitens) timber under the planar shear test. Based on the results, Gr and τr values were shown to be significantly correlated with the density of the CLT panel. There was also a positive correlation between the RS modulus and MOR of the CLT panel. The specimens with high MOE in the top and bottom layers indicated the highest τr and Fmax values. This indicated that using high-grade boards in the top and bottom lamellae plays an important role in increasing the RS strength, whereas using them in the cross-layer has a positive contribution in increasing shear modulus. The maximum observed RS strength and modulus ranged from 2.8–3.4 MPa and 54.3–67.9 MPa, respectively, exceeding the RS characteristic values of the resource. The results obtained in this study were comparable to those recommended in European standards for softwood CLT, demonstrating the potential use for eucalypt timber boards in CLT production. This paper provides an important insight into supporting the potential engineering applications of CLT panel products fabricated with eucalypt plantation.

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Experimental study on bending properties of cross-laminated timber-bamboo composites

Cited by 39 publications

References 27 publications

Uplift capacity evaluation of light-framed wood structure’s roof-to-wall connections

Uplift capacity evaluation of light-framed wood structure’s roof-to-wall connections

Bond Quality and Durability of Cross-Laminated Flattened Bamboo and Timber (CLBT)

Rolling Shear Properties of Cross-Laminated Timber Made from Australian Plantation Eucalyptus nitens under Planar Shear Test

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