材料科学与工程学报2025，Vol.43Issue(3)：372-378,7.DOI:10.14136/j.cnki.issn1673-2812.2025.03.005
GFRP拉挤型材-木塑复合截面梁弯曲性能实验
Experiment on Flexural Properties of Pultruded GFRP Profiles-wood Plastic Composites Beams
摘要
Abstract
Both wood-plastic composite(WPC)and glass fiber reinforced polymer(GFRP)have advantages of light weight,corrosion resistance,convenient molding,and flexible design,which have broad application prospects in civil engineering under severe environment.In order to promote the application of WPC and GFRP in the field of structural engineering,a new kind of composite beam was proposed,with PVC-based WPC as the surface and pultruded GFRP profile as the core material.The influence of WPC surface reinforcement methods on the flexural performance of pultruded GFRP profile composite beam was studied by carrying out four-point bending test.Results showed that the failure mode of pure pultruded GFRP profile beam was compressive failure at the loading area,and the failure modes of pultruded GFRP profile composite beam reinforced by two-sided and four-sided WPC surfaces were tensile failure at the mid-span WPC bottom surface and compressive failure at the upper part of specimen.Compared with pure pultruded GFRP profile beam,the ultimate bearing capacity of two-sided and four-sided WPC reinforced pultruded GFRP profile composite beams increased by 54.78％and 155.20％,and the maximum deflection increased by 15.59％and 28.74％,the reinforcement effect of specimen with four-sided WPC surfaces was significant.Based on the high-order shear deformation theory,the control differential equation of composite beams with four-sided WPC surfaces was derived,and their theoretical load-displacement curve was obtained.The accuracy of the theoretical equation was verified by comparing with the test.关键词
木塑复合材料/GFRP拉挤型材/复合截面梁/面层增强Key words
Wood-plastic composite/Pultruded GFRP profiles/Composite beam/Surface reinforcement分类
通用工业技术引用本文复制引用
徐心悦,刘文怡,霍瑞丽,方海,陈登杨,季会..GFRP拉挤型材-木塑复合截面梁弯曲性能实验[J].材料科学与工程学报,2025,43(3):372-378,7.基金项目
国家重点研发计划项目(2019YFD1101205) （2019YFD1101205）
