Axial compressive performance and prediction models of confined concrete cylinders made of BFRP-PVC composite tubes

IF 4.4 3区工程技术 Q1 ENGINEERING, CIVIL Archives of Civil and Mechanical Engineering Pub Date : 2024-10-07 DOI:10.1007/s43452-024-01053-x

Wenyu Wang, Huaxin Liu, Yue Zhong, Genjin Liu

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Abstract

In recent years, fiber-reinforced polymer-polyvinyl chloride (FRP-PVC) tubular cylinders have been widely used in civil engineering applications. Concrete-filled FRP-PVC tubes possess excellent mechanical behavior and high durability. In this work, a composite reinforcement system with basalt fiber reinforced polymer (BFRP) strips wrapped around the surface of polyvinyl chloride (PVC) tubes is proposed for existing concrete cylinders. In addition, the effectiveness of the composite reinforcement system is evaluated and the working mechanism is studied. Monotonic axial compression tests are conducted on 39 concrete cylindrical specimens, and the parameters studied includs the number of BFRP layers, the net spacing of BFRP strips, and the type of reinforcement. The test results demonstrate that the bearing capacity of specimens with BFRP strips was enhanced by 8.42% up to 45.43% compared to unreinforced concrete cylinders. While, the bearing capability of BFRP-PVC reinforced specimens increase by 26.54% up to 62.30% compared with the control group specimen. Furthermore, a strength model that considers equivalent constraint effect coefficients is proposed based on existing strength models. The difference between the predicted results and the experimental results is within 15%. Research has shown that the reinforcement effect of the composite system is significant, and the research results can provide reference for engineering practice.

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由 BFRP-PVC 复合管制成的受限混凝土圆柱体的轴向抗压性能和预测模型

近年来，纤维增强聚合物-聚氯乙烯（FRP-PVC）管筒在土木工程中得到了广泛应用。混凝土填充 FRP-PVC 管具有优异的机械性能和高耐久性。在这项工作中，针对现有的混凝土圆筒，提出了一种在聚氯乙烯（PVC）管表面包裹玄武岩纤维增强聚合物（BFRP）条的复合加固系统。此外，还对复合加固系统的有效性进行了评估，并对其工作机理进行了研究。对 39 个混凝土圆柱试件进行了单调轴向压缩试验，研究的参数包括 BFRP 层数、BFRP 带的净间距和加固类型。试验结果表明，与未加固的混凝土圆柱体相比，带有 BFRP 带的试件的承载能力提高了 8.42% 至 45.43%。与对照组试样相比，BFRP-PVC 加固试样的承载能力提高了 26.54% 至 62.30%。此外，在现有强度模型的基础上，提出了一种考虑等效约束效应系数的强度模型。预测结果与实验结果的差异在 15%以内。研究表明，复合材料系统的加固效果显著，研究成果可为工程实践提供参考。

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来源期刊

Archives of Civil and Mechanical Engineering 工程技术-材料科学：综合

CiteScore

6.80

自引率

9.10%

发文量

201

审稿时长

4 months

期刊介绍： Archives of Civil and Mechanical Engineering (ACME) publishes both theoretical and experimental original research articles which explore or exploit new ideas and techniques in three main areas: structural engineering, mechanics of materials and materials science. The aim of the journal is to advance science related to structural engineering focusing on structures, machines and mechanical systems. The journal also promotes advancement in the area of mechanics of materials, by publishing most recent findings in elasticity, plasticity, rheology, fatigue and fracture mechanics. The third area the journal is concentrating on is materials science, with emphasis on metals, composites, etc., their structures and properties as well as methods of evaluation. In addition to research papers, the Editorial Board welcomes state-of-the-art reviews on specialized topics. All such articles have to be sent to the Editor-in-Chief before submission for pre-submission review process. Only articles approved by the Editor-in-Chief in pre-submission process can be submitted to the journal for further processing. Approval in pre-submission stage doesn''t guarantee acceptance for publication as all papers are subject to a regular referee procedure.