方形耐候钢管混凝土短柱轴压力学性能研究  

Study on Mechanical Behavior of Concrete-filled Square Weathering Steel Tubular Stub Columns Under Axial Loading

作　　者：张涛 秦雪 张拓 张太平 薛茹[1] 史科 刘崇旺 赵雯桐 ZHANG Tao;QIN Xue;ZHANG Tuo;ZHANG Taiping;XUE Ru;SHI Ke;LIU Chongwang;ZHAO Wentong(School of Civil Architecture,Zhengzhou University of Aeronautics,Zhengzhou 450046,China;China Blue Chemical Ltd.,Dongfang 572600,China;Henan Daming Architectural Design Co.,Ltd.,Hebi 458000,China;Jiangang Industrial Co.,Ltd.,Zhengzhou Airport Economy Zone,Zhengzhou 450001,China)

机构地区：[1]郑州航空工业管理学院土木建筑学院,河南郑州450046 [2]中海石油化学股份有限公司,海南东方572600 [3]河南大明建筑设计有限公司,河南鹤壁458000 [4]郑州航空港区建港实业有限公司,河南郑州450001

出　　处：《郑州航空工业管理学院学报》2024年第2期95-101,112,共8页Journal of Zhengzhou University of Aeronautics

基　　金：河南省科技攻关项目(222102320014、222102320070);郑州航院教育改革研究和实践项目(zhjy23-78);郑州航院研究生优质课程项目(2023YJSKC05);郑州航院研究生教育改革与发展研究项目(2023YJSJG15);国家自然科学基金项目(52208220);河南省高等学校重点科研项目(22A560006)。

摘　　要：为研究方形耐候钢管混凝土短柱的轴压力学性能,首先设计并开展了4根轴压短柱试验研究。进而采用Abaqus有限元软件建立方形耐候钢管混凝土短柱有限元模型并进行数值分析。数值模拟结果表明,轴压短柱直至破坏共经历了3个阶段:弹性段、弹塑性段和破坏段。其破坏模式均为柱中局部屈曲。耐候钢拉伸性能试验特征与低碳钢的力学性能相近,有限元建模采用低碳钢本构关系可准确模拟方形耐候钢管混凝土短柱的轴压力学性能。钢管内焊接拉筋能有效改善钢管对核心混凝土的约束作用,进而提高轴压短柱的极限承载力和延性。最后,方形耐候钢管混凝土短柱轴压力学性能与普通钢管混凝土短柱无异。To investigate the compressive behavior of concrete-filled square weathering steel tubular(CFWT)stub columns,compression tests on 4 specimens were conducted.And then,Finite element(FE)models were established using Abaqus software to analyze the compressive performance of composite columns.Based on the experimental investigation and numerical simulation,research results indicated that the composite columns were generally considered to experience three stages until failure:elastic stage,elastic-plastic stage and failure stage.The failure modes of all the specimens showed the local buckling.Besides,there was no obvious difference of mechanical performance between weathering steel and carbon steel,and therefore FE models with constitutive relation of carbon steel can accurately simulate the behavior of concrete-filled square weathering steel tubular stub columns.Moreover,using stirrups can help to improve the ultimate bearing capacity and ductility of composite columns,and also enhance the confinement effect of steel tube on the core concrete.And lastly,no significant difference of compressive behavior between CFWT stub column and CFT stub column was observed.

关 键 词：方钢管混凝土短柱 耐候钢 轴压性能 极限承载力 约束作用 

分 类 号：TU398[建筑科学—结构工程]