Flexural Properties of Bamboo - Log Composite Beam
Flexural Properties of Bamboo - Log Composite Beam is a scholarly work, published in 2018 in ''Journal of Engineering Science and Technology Review''. The main subjects of the publication include beam, composite material, wood science, Bambusoideae, flexural modulus, structural engineering, composite number, Flexural rigidity, flexural strength, materials science, and -. Timber is a renewable, environmentally friendly construction material.Moreover, the span and flexural capacity of traditional timber structures are sensitive to many material properties.To improve the poor bearing capacity of timber structures, a bamboo-log composite beam was constructed by using the log as the skeleton and connecting glue-laminated bamboo with epoxy resin adhesive.A three-point stress-bending test was conducted by using three log beams and three bamboo-log composite beams with consistent structural size and features.The failure mode, ultimate flexural capacity, flexural rigidity, and strain changes of these beams were studied.Experimental results demonstrate that the log beam and bamboo-log composite beam indicate brittle failures and natural defects of two raw materials that can significantly influence flexural capacity.Strain of the midspan section along the height continues to conform to the plane cross-section assumption, thereby indicating that bamboo and log can cooperate.The flexural capacity of the bamboo-log composite beam increases by 17.5%-75.6%and flexural rigidity increases by 43.9%-49.4% compares with those of the log beam.Furthermore, the midspan ultimate deflection increases by -1.3%-58.2%.Results reveal that bamboo in the bamboo-log composite beam fully develops tensile properties, thereby resulting in significant improvements in flexural rigidity and flexural capacity.Finally, a calculation formula of the flexural capacity of the bamboo-log composite beam was proposed.The theoretical results and experimental results were compared, and the mean error is lower than 10%.This study provides experimental and theoretical references to bamboo-log composite beam design and the application of bamboolog composite beams in timber structures.