Seismic performance of trussed concrete-filled steel tubular (CFST) hybrid structures: Experiments

IF 7.6 1区工程技术 Q1 ENGINEERING, CIVIL

Engineering Structures Pub Date : 2026-04-15 Epub Date: 2026-02-04 DOI:10.1016/j.engstruct.2026.122234

Zhan-Shuo Liang , Lin-Hai Han , Ming Xiao

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引用次数: 0

Abstract

To investigate the seismic performance of trussed concrete-filled steel tubular (CFST) hybrid structures, a cyclic loading test program was conducted on 18 specimens to examine the influences of key parameters on hysteretic behavior. The effects of cross-sectional shape (circular and square), web types (KT-, T-, K-, and Y-joint), web-to-chord diameter ratio (d/D = 0.39 and 0.47), shear span ratio (m = 2.17 and 3.31), chord steel yield strength (f_y = 431 and 562 N/mm² for circular specimens; f_y = 388 and 513 N/mm² for square specimens), and axial compression ratio (n = 0–0.6) were studied. Based on thorough recording and analysis of the failure processes, hysteretic curves, and strain distributions, typical failure modes and hysteretic characteristics of these structures were clarified, the effects of key parameters on the skeleton curve, ductility, energy dissipation capacity, strength degradation, and stiffness degradation were elucidated, further the hybrid effects of the structure were revealed. Moreover, comparative tests with the trussed hollow steel tubular specimen C2M-a2a3-s indicate that the peak load (P_m), elastic stiffness (K), ductility factor (μ), and total cumulative energy dissipation (E_ta) of the trussed CFST hybrid specimen C2M-a2a3 are increased by 54.5 %, 47.4 %, 27.9 %, and 88.5 %, respectively.

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桁架钢管混凝土混合结构的抗震性能：试验

为研究桁架钢管混凝土（CFST）混合动力结构的抗震性能，对18个试件进行了循环加载试验，研究了关键参数对其滞回性能的影响。研究了截面形状（圆形和方形）、腹板类型（KT型、T型、K型和y型接头）、腹板-弦径比（d/ d = 0.39和0.47）、抗剪跨比（m = 2.17和3.31）、弦钢屈服强度（圆形试件fy = 431和562 N/mm2；方形试件fy = 388和513 N/mm2）和轴压比（N = 0-0.6）的影响。通过对破坏过程、滞回曲线和应变分布的详细记录和分析，明确了这些结构的典型破坏模式和滞回特征，阐明了关键参数对骨架曲线、延性、耗能能力、强度退化和刚度退化的影响，揭示了结构的混杂效应。与C2M-a2a3-s桁架空心钢管试件对比试验表明，C2M-a2a3的峰值荷载（Pm）、弹性刚度(K)、延性系数（μ）和总累积耗能（Eta）分别提高了54.5 %、47.4 %、27.9 %和88.5 %。

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来源期刊

Engineering Structures 工程技术-工程：土木

CiteScore

10.20

自引率

14.50%

发文量

1385

审稿时长

67 days

期刊介绍： Engineering Structures provides a forum for a broad blend of scientific and technical papers to reflect the evolving needs of the structural engineering and structural mechanics communities. Particularly welcome are contributions dealing with applications of structural engineering and mechanics principles in all areas of technology. The journal aspires to a broad and integrated coverage of the effects of dynamic loadings and of the modelling techniques whereby the structural response to these loadings may be computed. The scope of Engineering Structures encompasses, but is not restricted to, the following areas: infrastructure engineering; earthquake engineering; structure-fluid-soil interaction; wind engineering; fire engineering; blast engineering; structural reliability/stability; life assessment/integrity; structural health monitoring; multi-hazard engineering; structural dynamics; optimization; expert systems; experimental modelling; performance-based design; multiscale analysis; value engineering. Topics of interest include: tall buildings; innovative structures; environmentally responsive structures; bridges; stadiums; commercial and public buildings; transmission towers; television and telecommunication masts; foldable structures; cooling towers; plates and shells; suspension structures; protective structures; smart structures; nuclear reactors; dams; pressure vessels; pipelines; tunnels. Engineering Structures also publishes review articles, short communications and discussions, book reviews, and a diary on international events related to any aspect of structural engineering.