开槽损伤六边形钢管混凝土柱轴压性能研究

刘劲; 孙翊俊; 王文君; 潘志成; 熊燮; 梁聪

doi:10.12454/j.jsuese.202600515

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开槽损伤六边形钢管混凝土柱轴压性能研究

更新时间：2026-07-29

- 开槽损伤六边形钢管混凝土柱轴压性能研究
- Research on the Axial Compression Performance of Concrete-Filled Hexagonal Steel Tubular Columns with Slot Damage
- 工程科学与技术 2026年页码：1-11
- 作者机构：
  
  1.湖南城市学院陶粒混凝土技术研发与应用湖南省工程研究中心，湖南益阳 413000
  2.中国水利水电第八工程局有限公司，湖南长沙 410004
  3.中电建池州长智建工有限公司，安徽池州 247115
- 作者简介：
  
  刘劲（1988-），男，教授，博士. 研究方向：钢混凝土组合结构方向. E-mail：liujing@hncu.edu.cn
  王文君，讲师，E-mail：wangwenjun@hncu.edu.cn
- 基金信息：
  
  国家自然科学基金项目(52008159);湖南省重点研发计划项目(2025JK2092);湖南省研究生科研创新项目(CX20251753)
- DOI：10.12454/j.jsuese.202600515
  中图分类号：
- 收稿：2026-06-12，
  
  修回：2026-07-24，
  
  网络首发：2026-07-22，
- 稿件说明：
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刘劲,孙翊俊,王文君等.开槽损伤六边形钢管混凝土柱轴压性能研究[J].工程科学与技术,

LIU Jing,SUN Yijun,WANG Wenjun,et al.Research on the Axial Compression Performance of Concrete-Filled Hexagonal Steel Tubular Columns with Slot Damage[J].Advanced Engineering Sciences,
刘劲,孙翊俊,王文君等.开槽损伤六边形钢管混凝土柱轴压性能研究[J].工程科学与技术, DOI：10.12454/j.jsuese.202600515.

LIU Jing,SUN Yijun,WANG Wenjun,et al.Research on the Axial Compression Performance of Concrete-Filled Hexagonal Steel Tubular Columns with Slot Damage[J].Advanced Engineering Sciences, DOI：10.12454/j.jsuese.202600515.XXXX,XX(XX):1‒11.

摘要

为揭示开槽损伤对六边形钢管混凝土（hexagonal concrete-filled steel tube，HCFT）柱轴压性能的影响机理，考虑构件开槽方向、开槽长度、开槽位置等参数，进行14根HCFT短柱轴压试验，包括12根开槽损伤试件和2根未开槽试件，轴压试验过程可分为弹性、弹塑性与破坏3个阶段，水平开槽柱因槽口闭合失效，垂直开槽柱因槽口撕裂失效，且垂直开槽试件开槽处的混凝土破坏更严重，角部开槽HCFT柱的承载力低于中部开槽柱，水平开槽和垂直开槽的长度越大，构件承载力越低。采用ABAQUS有限元软件，建立开槽损伤HCFT柱三维实体有限元模型，研究开槽尺寸、开槽位置、开槽方向、材料强度、钢管厚度、试件尺寸等参数对开槽损伤HCFT柱承载力的影响，数值分析结果表明，开槽、材料、几何参数对HCFT短柱力学性能存在显著影响，增大开槽尺寸及角部开槽将降低构件承载能力，角部开槽较中部开槽更为不利，增大钢管壁厚、提升钢材与混凝土强度可有效提高构件承载力。其中，部分试件水平开槽长度从100 mm减小到30 mm时，HCFT柱承载力提高6.00%，垂直开槽长度从100 mm减小到30 mm时，HCFT柱承载力提高4.04%，与中部开槽HCFT柱相比，角部开槽HCFT柱承载力降低3.84%。随着开槽长度增加，核心混凝土与钢管峰值轴向应力均逐渐降低，且水平开槽的削弱作用更显著；钢管转角处核心混凝土峰值应力较中间部位高16.48%，表明转角区域约束作用更强。基于参数分析，建立考虑开槽尺寸、方向及位置影响的HCFT柱轴压承载力计算公式，承载力计算公式与试验结果、有限元结果比值的均值分别为0.999、0.986，公式精度较好、形式简洁、物理意义明确，完善了该类受损构件的计算理论，可为工程设计提供借鉴。

Abstract

Objective Hexagonal concrete-filled steel tube (HCFT) columns combine the advantages of steel tubes and core concrete

exhibiting high bearing capacity

good ductility and excellent confinement performance. Although considerable studies have been conducted on the mechanical behaviour of intact HCFT columns and damaged concrete-filled steel tubular members

the effects of slot damage on the axial compressive behaviour of HCFT columns have not yet been systematically investigated. In particular

the influence of slot orientation

slot length and slot location on the failure mechanism

confinement effect and axial compressive capacity remains unclear. Therefore

this study aims to clarify the influence mechanism of slot damage on the axial compressive behaviour of HCFT columns and to establish a simplified analytical model for predicting their axial compressive capacity.Methods Fourteen short hexagonal concrete-filled steel tube (HCFT) columns were tested under monotonic axial compression to explore how slot damage affects structural performance

including twelve slotted specimens and two intact reference columns. The test variables covered slot orientation (horizontal/vertical)

length and position (flat side/corner)

whereas cross-sectional size

tube thickness

material properties and loading conditions remained consistent across all specimens. Load–displacement curves

deformation features

steel local buckling

concrete damage and failure patterns were captured to quantify slot-induced degradation in axial compressive behaviour. A 3D nonlinear ABAQUS finite element (FE) model was built and validated against test data from failure modes

load–displacement responses and ultimate capacities. Validated models were adopted for systematic parametric analyses

examining slot geometry

concrete strength

steel yield strength

tube thickness and column size on the axial performance and confinement mechanism of slotted HCFT columns. Ultimately

regression of experimental and numerical data generated a simplified formula that accounts for slot geometry

which was verified to predict the axial bearing capacity of damaged HCFT members.Results The experimental results revealed three sequential loading stages for slotted hexagonal concrete-filled steel tube (HCFT) columns: elastic

elastic–plastic and failure. Before steel yielding

the tube and core concrete deformed compatibly to bear axial loads. With rising load

stress concentrated around slots

triggering distinct failure modes controlled by slot orientation. Horizontal-slot columns failed via gradual slot closure

while vertical-slot specimens suffered edge tearing and local buckling

accompanied by heavier concrete crushing near damaged zones. Slot damage lowered both axial capacity and confinement efficiency relative to intact HCFT columns.Conclusions Slot damage significantly affects the axial compressive behaviour and confinement mechanism of HCFT columns. The failure mode is strongly dependent on slot orientation

with horizontal slots mainly causing slot closure and vertical slots leading to slot-edge tearing accompanied by local buckling. The reduction in axial compressive capacity is primarily governed by slot length and slot location

whereas the influence of slot width is relatively limited. Parametric analyses demonstrate that increasing the steel tube thickness

concrete strength and steel yield strength can effectively compensate for the adverse effect of slot damage. Furthermore

the corner regions of the hexagonal steel tube provide more effective confinement to the core concrete than the flat sides. A simplified analytical equation considering the effects of slot size

slot orientation and slot location is proposed and verified against both experimental and numerical results. The proposed model provides an accurate and practical approach for evaluating the axial compressive capacity of slotted HCFT columns and offers a theoretical basis for the design and assessment of damaged HCFT structures.

关键词

Keywords

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