Compressive behavior of high strength concrete stuffed inside aluminum tube considering bolted bonding: An experimental and numerical study

IF 4.3 2区工程技术 Q1 ENGINEERING, CIVIL Structures Pub Date : 2025-03-17 DOI:10.1016/j.istruc.2025.108675

Ramy I. Shahin , Sabry Fayed , Saad A. Yehia

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Abstract

Concrete-filled aluminum tubes (CFAT) have emerged as promising structural elements due to their high strength and lightweight properties. This study investigates the compressive behavior of high-strength concrete encased in aluminum tubes with bolted bonding configurations, combining experimental testing and finite element analysis. Eight CFAT specimens with varying bolt configurations were tested under axial compression to evaluate their load capacity, stiffness, and failure mechanisms. Results indicated that bolted bonding significantly enhanced the composite action, increasing load capacity by up to 22 % compared to unbolted specimens and reducing displacement, thereby improving structural stiffness. A finite element model in Abaqus was validated against experimental data, demonstrating good predictive capability for load-displacement responses and failure modes. Findings suggest that bolted CFATs provide improved strength and ductility, with optimal performance achieved using three to four rows of bolts in dual-column configurations. This research offers valuable insights for designing CFAT structures in applications requiring high-strength and durable materials.

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考虑螺栓粘结的铝管内高强混凝土抗压性能试验与数值研究

混凝土填充铝管（CFAT）因其高强度和轻质特性，已成为一种前景广阔的结构元件。本研究结合实验测试和有限元分析，对采用螺栓连接配置的铝管包裹高强度混凝土的抗压行为进行了研究。在轴向压缩下测试了八种不同螺栓配置的 CFAT 试样，以评估其承载能力、刚度和破坏机制。结果表明，螺栓连接大大增强了复合材料的作用，与无螺栓连接的试样相比，负载能力提高了 22%，并减少了位移，从而提高了结构刚度。利用 Abaqus 建立的有限元模型与实验数据进行了验证，结果表明该模型对载荷-位移响应和失效模式具有良好的预测能力。研究结果表明，螺栓连接的 CFAT 具有更高的强度和延展性，在双柱配置中使用三至四排螺栓可实现最佳性能。这项研究为在需要高强度和耐用材料的应用中设计 CFAT 结构提供了宝贵的见解。

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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.