Behavior of SSC-filled plastic-lined steel tube (SSC-PLST) slender columns under eccentric compression

IF 4.3 2区工程技术 Q1 ENGINEERING, CIVIL Structures Pub Date : 2025-06-01 Epub Date: 2025-04-15 DOI:10.1016/j.istruc.2025.108916

Yong Ye , Qian-Song Jin , De-Xian Jiang , Hang Jiang , Yang Liu

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Abstract

This paper presents a comprehensive study on the mechanical behavior and design methodology of seawater sea sand concrete-filled plastic-lined steel tubular (SSC-PLST) slender columns under eccentric compression. A series of experiments were conducted on eighteen specimens, including twelve SSC-PLST slender columns and six hollow steel tubes, and parameters such as slenderness ratio, load eccentricity, and concrete strength were varied to observe their influence on the failure modes and load-carrying capacities of the specimens. Finite element analysis (FEA) was conducted to develop a numerical model of the SSC-PLST slender columns. Furthermore, parametric studies were conducted to evaluate the impact of concrete strength, steel strength, slenderness ratio, and load eccentricity on the ultimate load-carrying capacity of the SSC-PLST columns. The applicability of existing design method for concrete-filled steel tubular structures in calculating the ultimate load-carrying capacity of SSC-PLST slender columns was also assessed.

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SSC-PLST填充塑料内衬钢管细长柱偏心受压性能研究

本文对偏心受压条件下海水-海砂钢管混凝土细长柱的受力性能及设计方法进行了综合研究。对12根SSC-PLST细长柱和6根空心钢管等18个试件进行了一系列试验，通过改变长细比、荷载偏心、混凝土强度等参数，观察其对试件破坏模式和承载能力的影响。采用有限元分析方法建立了SSC-PLST细长柱的数值模型。此外，还进行了参数化研究，以评估混凝土强度、钢材强度、长细比和荷载偏心对SSC-PLST柱极限承载能力的影响。并对现有钢管混凝土结构设计方法在计算SSC-PLST细长柱极限承载力中的适用性进行了评价。

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来源期刊

Structures Engineering-Architecture

CiteScore

5.70

自引率

17.10%

发文量

1187

期刊介绍： Structures aims to publish internationally-leading research across the full breadth of structural engineering. Papers for Structures are particularly welcome in which high-quality research will benefit from wide readership of academics and practitioners such that not only high citation rates but also tangible industrial-related pathways to impact are achieved.