钢管-再生混凝土-拼接木复合长柱轴压性能有限元分析  

Finite Element Analysis of Axial Compression Performance on Steel Tube-Recycled Concrete-Spliced Wood Composite Long Columns

作　　者：刘永军[1] 王紫怡 佟舟[2] LIU Yongjun;WANG Ziyi;TONG Zhou(School of Civil Engineering,Shenyang Jianzhu University,Shenyang,China,110168;School of Civil Engineering,Shenyang Urban Construction University,Shenyang,China,110167)

机构地区：[1]沈阳建筑大学土木工程学院,辽宁沈阳110168 [2]沈阳城市建设学院土木工程学院,辽宁沈阳110167

出　　处：《沈阳建筑大学学报（自然科学版）》2022年第6期1020-1028,共9页Journal of Shenyang Jianzhu University：Natural Science

基　　金：“十三五”国家重点研发计划项目(2018YFD1100403)。

摘　　要：目的 研究钢管-再生混凝土-拼接木复合长柱轴压力学性能,为该类构件的设计和工程应用提供参考。方法 通过有限元软件ABAQUS对其进行数值模拟研究,探讨复合长柱的受力机理和应力分布,分析再生混凝土强度、长细比以及钢管壁厚等参数对复合长柱轴压性能的影响。结果 再生混凝土强度每增加10 MPa,构件的极限承载力分别提升6.07%、5.13%、5.90%、6.53%;构件延性系数随之逐渐降低;对初始刚度影响不显著。提高构件的长细比,其极限承载力和初始刚度均有所减小,但复合长柱延性随之有所增大。钢管壁厚从3 mm增加至7 mm,每增加1 mm,其极限承载力分别提升11.34%、8.24%、7.07%、6.54%;其延性和初始刚度均随壁厚的增加而增加。结论 钢管-再生混凝土-拼接木复合长柱的轴压力学性能良好,可以满足工程需要。The axial compressive performance of steel tube-recycled concrete-spliced wood composite long columns was studied for the design and engineering application of this kind of components.Through the numerical simulation of the finite element software ABAQUS,the effects of recycled concrete strength, slenderness ratio and steel pipe wall thickness on the axial compressive properties of the composite long columns are analyzed, and the stress mechanism and stress distribution of the composite column are discussed.For every 10 MPa increase in the strength of recycled concrete, the ultimate bearing capacity of the specimens increased by 6.07%,5.13%,5.90% and 6.53% respectively, but the ductility of the member decreases gradually, and no significant influence on the initial stiffness.However with the increase of slenderness ratio, the peak bearing capacity and initial stiffness decrease, and the ductility increases.When the wall thickness of steel pipe increases from 3 mm to 7 mm, the ultimate bearing capacity increases by 11.34%,8.24%,7.07% and 6.54% respectively for every 1 mm increase.And the ductility and initial stiffness increase too with the increase of wall thickness.So the steel tube-recycled concrete-spliced wood composite long column has good axial compressive mechanical properties, which can meet the needs of engineering.

关 键 词：拼接木 再生混凝土 复合长柱 轴心受压性能 有限元分析 

分 类 号：TU366[建筑科学—结构工程]