钢骨-钢管混凝土压弯构件受力性能分析  

Research on Behavior of Concrete-Filled Steel Tubular Members with Section Steel under Compression-Bending Loads

作　　者：袁姣姣 尹张亮 YUAN Jiaojiao;YIN Zhangliang(Beijing Mechanized Construction Group Co.,Ltd.,Beijing 100000,China)

机构地区：[1]北京市机械施工集团有限公司,北京100000

出　　处：《河南科技》2023年第5期73-78,共6页Henan Science and Technology

摘　　要：【目的】为了研究内置钢骨对钢管混凝土(CFST)压弯构件受力性能的影响。【方法】采用ABAQUS有限元软件建立了内置不同截面钢骨的CFST压弯构件有限元模型,通过已有试验对模型的合理性进行了验证。在此基础上分析了3种不同截面压弯构件的工作机理,包括构件的侧向承载力、轴力和弯矩分布发展,以及应力和破坏形态。【结果】结果表明:在CFST中配置钢骨可以显著提高压弯构件的侧向承载力,圆钢管对承载力的提高作用较十字形钢骨更显著。【结论】内置钢骨对组合构件各部件的轴力和弯矩的发展和分布影响显著。侧向加载过程中钢管和钢骨卸载的轴力被混凝土承担,钢管的轴力卸载程度较钢骨更严重。[Purposes]In order to study the influence of the configured section steel on the mechanical performance of concrete-filled steel tubular(CFST)beam-columns.[Methods]The finite element model of CFST members with various section steel under compression-bending loads was established by using the ABAQUS finite element software.The rationality of numerical model was verified by previ⁃ous experiments.On this basis,the working mechanisms of three compression-bending members were analyzed,including the lateral bearing capacity,the development and distribution of axial force and bending moment,as well as the stress and failure modes.[Findings]The results show that the configura⁃tion of section steel can significantly improve the lateral bearing capacity of CFST columns,and the im⁃provement effect of the circular steel tube on the bearing capacity is more significant than that of the cross-shaped section steel.[Conclusions]The section steel has a significant influence on the develop⁃ment and distribution of the axial force and bending moment of each component of composite members.During the lateral loading process,the unloaded axial force of the steel tube and section steel is borne by the concrete,and the unloading degree of axial force of outer steel tube is more serious than that of inner section steel.

关 键 词：钢管混凝土 钢骨 有限元分析 压弯性能 

分 类 号：TG333[金属学及工艺—金属压力加工]