Experimental Investigation on the Axial Loading Performance of Grooving-Damaged Square Hollow Concrete-Filled Steel Tube Columns

IF 3.1 3区工程技术 Q2 CONSTRUCTION & BUILDING TECHNOLOGY

Buildings Pub Date : 2023-12-28 DOI:10.3390/buildings14010087

Jing Liu, Zimao Pan, Zhicheng Pan, Shaohua He, Wenzhuo Yu

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引用次数: 0

Abstract

Under the influence of material defects, structural grooving, environmental corrosion, and other factors in engineering, concrete-filled steel tubes incur local defects on their external surfaces that affect their structural integrity and service life. This work conducts axial compression tests on 10 grooving-damaged square hollow concrete-filled steel tube (SHCFST) columns to investigate the effect of grooving damage on their axial compressive ultimate bearing capacity and the effect of steel tubes on concrete confinement. It explores the effects of three parameters, namely, the length of grooves, presence of slots in internal and external steel tubes, and orientation of grooves, on structural static performance. This study analyzes the loading, failure mechanisms, and axial compressive ultimate bearing capacity of grooving-damaged SHCFST columns. Results indicate that grooving weakens the steel tube’s confinement effect on the concrete core, reducing the axial compressive ultimate bearing capacity of specimens. On the basis of this experimental research, a method for calculating the axial compressive ultimate bearing capacity and axial compressive stiffness of grooving-damaged SHCFST columns is proposed. The calculation results closely align with experimental outcomes, providing valuable insights for related scientific research and engineering applications.

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开槽损坏的方形空心混凝土填充钢管柱的轴向加载性能实验研究

受材料缺陷、结构开槽、环境腐蚀等工程因素的影响，混凝土填充钢管的外表面会产生局部缺陷，从而影响其结构完整性和使用寿命。本研究对 10 根开槽损坏的方形空心混凝土填充钢管（SHCFST）柱进行了轴向压缩试验，以研究开槽损坏对其轴向压缩极限承载力的影响以及钢管对混凝土约束的影响。研究探讨了三个参数对结构静态性能的影响，即开槽长度、内外钢管是否有槽以及开槽方向。本研究分析了开槽破坏的 SHCFST 柱的加载、破坏机制和轴向压缩极限承载力。结果表明，开槽削弱了钢管对混凝土核心筒的约束作用，降低了试件的轴向抗压极限承载力。在此实验研究的基础上，提出了一种计算开槽破坏的 SHCFST 柱的轴向压缩极限承载力和轴向压缩刚度的方法。计算结果与实验结果非常吻合，为相关科学研究和工程应用提供了宝贵的启示。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Buildings Multiple-

CiteScore

3.40

自引率

26.30%

发文量

1883

审稿时长

11 weeks

期刊介绍： BUILDINGS content is primarily staff-written and submitted information is evaluated by the editors for its value to the audience. Such information may be used in articles with appropriate attribution to the source. The editorial staff considers information on the following topics: -Issues directed at building owners and facility managers in North America -Issues relevant to existing buildings, including retrofits, maintenance and modernization -Solution-based content, such as tips and tricks -New construction but only with an eye to issues involving maintenance and operation We generally do not review the following topics because these are not relevant to our readers: -Information on the residential market with the exception of multifamily buildings -International news unrelated to the North American market -Real estate market updates or construction updates