| In order to promote the development of modern construction industry towards green and industrialization,and promote bamboo materials to be applied to multi-story buildings.In this paper,based on the existing research of CFRP-reinforced CLB one-way panels,the flexural properties of CFRP-reinforced CLB two-way simple support panels are studied,and the preparation process,mechanical properties and flexural properties are investigated by experimental research,theoretical analysis and numerical simulation,respectively.The CFRP-reinforced Parallel Strand Bamboo(PSB)panels and CFRP-reinforced CLB two-way simple support panels were systematically studied by experimental research,theoretical analysis and numerical simulation.The main research work and conclusions of this paper are as follows.(1)A preliminary study of the mechanical properties of the test materials was carried out,including mechanical property tests of Parallel Strand Bamboo and CFRP grid.Uniaxial tensile tests were conducted on the Parallel Strand Bamboo panels to investigate the effects of variables such as the presence or absence of CFRP grid,grid spacing and number of grid layers on their axial tensile properties.The tests showed that the addition of CFRP grid could improve the defects of the original Parallel Strand Bamboo with large two-way variability,and the increase of the number of grid layers and grid spacing was able to improve the tensile properties of the specimens.(2)The bonding performance of CFRP grid with bamboo was investigated,i.e.,the damage mode,load-displacement curve and bond-slip curve were derived from the pull-out test,and the critical anchorage length formula of longitudinal carbon fiber bundles was derived and the bond-slip curve was fitted.It is concluded from the tests that the increase of both the number of longitudinal carbon fiber bundle layers and the grid spacing only enhances the bonding performance in the cis-grain direction,and the number and spacing of transverse carbon fiber bundles have significant effects on the longitudinal carbon fiber bundles,and the increase of the longitudinal carbon fiber bundle anchorage length has a decreasing trend of the average interfacial bond strength and the slip corresponding to the peak load.(3)The effects of the presence or absence of CFRP grid and the number of glued layers of CLB panels on the flexural performance of the CFRP-reinforced CLB two-way simple support panels were investigated.The effect of embedding CFRP grid in the bottom of CLB two-way simple support panels on its stiffness is small,while increasing the number of gluing layers can greatly enhance the stiffness of CFRP-reinforced CLB two-way simple support panels.The theoretical analysis of the deflection of the CLB two-way simple support panels is carried out,and the analysis results show that the deflection theoretical calculation formula used in this paper is reasonable and reliable.(4)The finite element analysis software ABAQUS is selected to simulate the CFRP-reinforced CLB two-way simple support panels in bending test,and the stress cloud,load-deflection and load-strain curves are obtained.The variation trend of the graphs is consistent with the actual test results.The linear phase results of the finite element simulation of the CLB two-way simple support panels are better than those of the simulated CFRP-reinforced CLB two-way simple support panels. |
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