Influence of fibre undulation on the biaxial behaviour of filament-wound FRP tubes in concrete-filled FRP tubes

IF 6.3 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composite Structures Pub Date : 2025-06-10 DOI:10.1016/j.compstruct.2025.119388

Jia-Qi Yang , Xinyu Li , Zhiyuan Li , Peng Feng , Lili Wu

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引用次数: 0

Abstract

Filament-wound FRP tubes are extensively utilized in various FRP-concrete composite structures, such as concrete-filled FRP tubes (CFFT). In CFFTs, the FRP tubes are subjected to axial compression and hoop tension. This biaxial stress state diminishes the confining effect. Owing to the winding procedure, the fibre bundles in the tube wall fluctuate, and the meso-scale fibre architecture can further impact the mechanical properties of the composites, rendering the classical lamination theory (CLT) insufficient in predicting the biaxial tube behaviour. This study presents a meso-scale finite element (FE) analysis on the repeated unit cells (RUCs) of the tube wall. With the RUC results, the parameters of CLT analysis are modified. The accuracy of the analysis-oriented model for FRP-confined concrete is improved by the modified CLT parameters. Based on the refined analysis-oriented model, a series of factors for modifying the hoop tensile test results are put forward for engineering design.

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纤维波动对纤维缠绕FRP管在混凝土中双轴性能的影响

纤维缠绕FRP管被广泛应用于各种FRP-混凝土组合结构中，如FRP填充管（CFFT）。在cfft中，FRP管承受轴向压缩和环向拉伸。这种双轴应力状态减弱了围合效应。由于缠绕过程，纤维束在管壁上的波动，而细观尺度的纤维结构会进一步影响复合材料的力学性能，使得经典的层合理论（CLT）在预测双轴管的性能方面存在不足。本文对管壁的重复单元格进行了中尺度有限元分析。根据RUC的结果，修改了CLT分析的参数。修正后的CLT参数提高了frp约束混凝土面向分析模型的精度。在此基础上，提出了修正环向拉伸试验结果的一系列因素，供工程设计参考。

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来源期刊

Composite Structures 工程技术-材料科学：复合

CiteScore

12.00

自引率

12.70%

发文量

1246

审稿时长

78 days

期刊介绍： The past few decades have seen outstanding advances in the use of composite materials in structural applications. There can be little doubt that, within engineering circles, composites have revolutionised traditional design concepts and made possible an unparalleled range of new and exciting possibilities as viable materials for construction. Composite Structures, an International Journal, disseminates knowledge between users, manufacturers, designers and researchers involved in structures or structural components manufactured using composite materials. The journal publishes papers which contribute to knowledge in the use of composite materials in engineering structures. Papers deal with design, research and development studies, experimental investigations, theoretical analysis and fabrication techniques relevant to the application of composites in load-bearing components for assemblies, ranging from individual components such as plates and shells to complete composite structures.