木材科学与技术2024，Vol.38Issue(3)：40-48,9.DOI:10.12326/j.2096-9694.2024044
木塑空心柱轴压力学性能试验与有限元分析
Experimental Study and Finite Element Analysis of Wood-Plastic Composite Hollow Columns Subjected to Axial Compression
摘要
Abstract
This study investigated the feasibility of using wood-plastic composites(WPCs)for load-bearing columns in low-density prefabricated houses.Co-extruded WPC hollow columns were evaluated through material property and axial compression tests.The effects of wall thickness,aspect ratio,and the thickness of embedded thin-walled steel tubes on the ultimate load-bearing capacity,deformability,and failure modes of WPC hollow columns were analyzed using ABAQUS software.The simulation results were highly consistent with the experimental test data,validating the effectiveness of the modeling approach.The experiment's results showed that the primary failure mode of the columns was localized buckling and a significant elastoplastic behavior was observed in the later stages of compression.Finite element analysis indicated that an increase in wall thickness improved both the initial stiffness and the ultimate load-bearing capacity of the columns,with an 8 mm thickness improvement to be the most cost-effective in terms of cost,weight,and load-bearing capacity.As the aspect ratio increased,there was a gradual decrease in both the load-bearing capacity and stiffness of the columns,with a shift in failure mode from strength failure to buckling.Integrating a 3 mm thin-walled steel tube significantly enhances the load-bearing capacity and ductility of the hybrid columns,making the mechanical properties suitable for use as compressive load-bearing members in building structures.关键词
木塑空心柱/轴压力学性能/有限元分析/载荷-位移关系/极限承载力Key words
wood-plastic composite hollow columns/axial compressive property/finite element analysis/load-displacement relationship/ultimate load capacity分类
建筑与水利引用本文复制引用
高飞,李俞谕,何文辉,郝笑龙,欧荣贤,王清文..木塑空心柱轴压力学性能试验与有限元分析[J].木材科学与技术,2024,38(3):40-48,9.基金项目
国家自然科学基金项目"基于热可逆共价化学的木塑复合材料蠕变与热变形调控"(32071698) （32071698）
广东省重点领域研发计划项目"再生低碳生态建筑材料研究与部品开发"(2020B0202010008). （2020B0202010008）
