Structural design and mechanical properties analysis of bamboo-wood cross-laminated timber

Abstract

To explore the overall mechanical properties of bamboo-wood composite cross-laminated timber (BCLT), a simulation model of BCLT mechanical behavior based on the solid element was established using the finite element software ABAQUS. The actual four-point bending experiment was compared and analyzed with the finite element numerical simulation. The total curve error coefficient of the BCLT specimen at 18-mm displacement was 0.2988 while the interval was 0.5 mm. The error coefficient was 0.0178 when the maximum load was reached, and the minimum error coefficient was 0.0015 at 12 mm of displacement. Analysis of the influence of material parameters, meshing density, and material arrangement on the final stress distribution indicate that the difference in the elastic parameters of the material greatly influence the final stress distribution, and the arrangement and combination of materials also have an effect on the overall mechanical properties of the BCLT board. The combination CLT1-2-1 (i.e., the upper and lower layers of the bamboo are Arrangement 1 and the hemlock is Arrangement 2) have a maximum load of 57682 Ν and a maximum stress of 103.9 MPa.

Study on the Static-Bending Properties of Surface-Reinforced Wood with Asymmetric Fibers

“…Each material requires a total of nine independent material elastic constants for the modulus of elasticity, Poisson's ratio, and shear modulus in the longitudinal (L), radial (R), and tangential (T) directions, respectively, based on the elasticity parameters of the wood for SPF, as given in the literature [17], and the elasticity constants of bamboo and CFRP, as given in the literature [24,25] for the three materials that are shown in Table 4. Note: E is the modulus of elasticity; G is the shear modulus; µ LT -L denotes the direction of applied stress and T denotes the direction of lateral deformation.…”

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

“…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.…”