Flexural property of steel reinforced bamboo scrimber composite beam

Abstract

To improve the bending performance of long-span bamboo scrimber beams, a new method of prepressing-cold pressing-hot forming was used to produce steel-reinforced bamboo scrimber composite beams. For steel-RBSC beams, four-point bending experiments were performed to study the failure mode, bending performance, load-displacement relationships, and strain history curves of composite beams. Based on cohesive zone model theory, finite element models of steel-RBSC beams were established and the bonding stress of the adhesive layer in steel-RBSC beams revealed. The results indicated that the failure mode of composite beams was fracture failure of the bamboo scrimber at the bottom between the loading rollers. Steel reinforcement had a significant effect on the strength and stiffness of bamboo scrimber beams. The maximum static stiffness of composite beams was increased by 70.15%, compared with that of bamboo scrimber beams. The load-displacement curves, mechanical properties, and section strains predicted by finite element models were consistent with the test results, verifying that these finite element models were correct. The main influence factors for the peeling of the adhesive layer were normal stress, shear stress, and mixed stress in the areas of pure bending section, bending-shear section, and loading roll area, respectively.

Flame-Retardant and Smoke-Suppression Properties of Bamboo Scrimber Coated with Hexagonal Boron Nitride

“…Currently, the research conducted by scholars in various countries on bamboo scrimber is mostly about its physical properties [5], mechanical properties [6][7][8], mildew resistance [9,10], surface properties [11], etc., and there are relatively few researches on its flame-retardant properties. Most flame-retardant treatments are impregnation treatments utilizing phosphorus-nitrogen flame retardants or nitrogen-phosphorus-boron composite flame retardants: e.g., Ran et al [12] impregnated the bamboo scrimber with different concentrations of flame retardant CaAl-PO4-LDHs.…”