复式矩形钢管混凝土中长柱轴压性能分析  

Analysis of Axial Compressive Properties of Compound Rectangular Concrete-filled Steel Tubular Medium and Long Columns

作　　者：刘宏波 叶晓旭 魏鲁彬 汪凯柄 杨奥齐 LIU Hongbo;YE Xiaoxu;WEI Lubin;WANG Kaibing;YANG Aoqi(School of Civil Engineering,Hebei University of Architecture,Zhangjiakou 075000,China;Key Laboratory of Civil Engineering Diagnosis,Transformation and Disaster Resistance,Zhangjiakou 075000,China)

机构地区：[1]河北建筑工程学院土木工程学院,河北张家口075000 [2]河北省土木工程诊断、改造与抗灾重点实验室,河北张家口075000

出　　处：《洛阳理工学院学报（自然科学版）》2024年第4期32-37,共6页Journal of Luoyang Institute of Science and Technology：Natural Science Edition

基　　金：河北省高校2022年基本科研业务费项目(2022CXTD01);河北建筑工程学院博士基金项目(B-202103);2024年度校级研究生创新基金项目(XY2024007);河北建筑工程学院研究生创新基金项目(XY2025042).

摘　　要：为研究复式矩形钢管混凝土中长柱的轴压性能,基于合理的混凝土与钢材本构关系,建立了复式矩形钢管中长柱的有限元模型,研究了试件的破坏形式与受力特征,分析了混凝土强度、钢材强度、内钢管直径对其极限承载力的影响。结果表明:复式矩形钢管混凝土中长柱的破坏形式主要来自于端部长边与短边的鼓曲破坏,且短边破坏先于长边破坏,矩形钢管对夹层混凝土的约束主要来自角部与短边。在试件达到极限承载力时,夹层混凝土承担荷载大于核心混凝土。复式矩形钢管混凝土中长柱的极限承载力随混凝土强度、钢材强度、内钢管直径的增大而增大。In order to study the axial compressive properties of the rectangular concrete-filled steel tubular medium and long column,based on the reasonable constitutive relationship between concrete and steel,a finite element model of the rectangular concrete-filled steel tubular medium and long column was established,the failure mode and force characteristics of the specimen studied,and the influences of concrete strength,steel strength and inner steel pipe diameter on its ultimate bearing capacity were analyzed.The results show that the failure mode of the medium and long column of duplex rectangular concrete-filled steel tube mainly comes from the drum failure of the long side and the short side of the end,and the short-side failure precedes the long-side failure.The constraints of the rectangular steel pipe on the sandwich concrete mainly come from the corner and short side.When the specimen reaches the ultimate bearing capacity,the load borne by the sandwich concrete is greater than that of the core concrete.The ultimate bearing capacity of the compound rectangular concrete-filled steel tube column increases with the increase of concrete strength,steel strength and inner steel pipe diameter.

关 键 词：复式矩形钢管混凝土 中长柱 有限元模拟 轴压承载力 

分 类 号：TU398.9[建筑科学—结构工程] TU317.1