Experimental Study On Flexural Behavior Of CLB Panels And FRP-Reinforced CLB Panels

Using bamboo ans the main material of building strcture is an important innovation and attempt in the field of modern structural design.However,bamboo is a small diameter hollow cylinder,whose shape and performance can not meet the construction requirements of modern architectural engineering structures.Therefore,this paper presents a kind of orthogonal glued bamboo material.Cross-laminated bamboo(CLB)is an innovative engineering bamboo panel product made from gluing layers of solid-sawn bamboo at perpendicular angles.Owing to the excellent structural rigidity in both orthogonal directions,CLB becomes a preferred construction material for shear walls,floor diaphragms and roof assemblies.In consideration of the material characteristics of glued bamboo,its bearing capacity,stiffness and seismic performance needs to be further improved.Therefore,combining with materials with high strength and high elastic modulus is an effective means to solve the problems faced by glued bamboo.The FRP material is light,has high strength,corrosion resistant and easy to construct,so FRP is the first choice for reinforced with glued bamboo.In this paper,the method of combining theory with experiment is used to study the Cross-laminated bamboo(CLB)board and FRP-reinforced CLB panels.Specific work is carried out in the following aspects:(1)Experiment on the mechanical properties of bambooReferring to the norms of wooden structure,tensile,compressive and flexural strength,flexural modulus and shear modulus of bamboo,Tensile strength and modulus of elasticity of FRP are tested in the paper.(2)Experiment on the flexural behavior of CLB panelsThe flexural property of CLB panels are investigated and the effects of thickness of panels and numbers of layers on flexural behavior are compared in this paper.It shows that the flexural behavior of CLB meets the requirement of roofs and floors in Chinese architectural structure load standards.Under the same conditions,the larger the thickness of panels,the more the number of layers,the better the flexural behavior.(3)Experiment on the flexural behavior of FRP-reinforced CLB panelsThe flexural property of CLB panels are investigated and the kinds of production precess of FRP-reinforced CLB panels are compared in this paper.It shows that the FRP materials can effectively improve the ultimate bearing capacity of CLB panels,and greatly enhance the stiffness and ductility of CLB panels.(4)Finite element analysis on the flexural behavior of CLB panels and FRP-reinforced CLB panelsThrough the finite element simulation of ABAQUS,the flexural behavior of CLB panels and FRP-reinforced CLB panels are analysed.The finite element analysis results are compared with the test results.It shows that the two results are pretty close,which provides a reference for the research of orthogonal glued bamboo and FRP-reinforced bamboo composites in the future.