Investigation on Glass Fiber-Reinforced Polymer Bars in Concrete Beams

IF 2 4区 工程技术 Q3 ENGINEERING, CHEMICAL
Trupti Amit Kinjawadekar, Shantharam Patil, Gopinatha Nayak, Saish Kumar
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引用次数: 0

Abstract

The use of glass fiber-reinforced polymer (GFRP) bars is an innovative approach to replace traditional reinforcement of steel into concrete structures. GFRP bars provide notable benefits like corrosion resistance, electromagnetic neutrality, higher tensile stress by weight ratio, sustainability, and cost-effective construction reducing maintenance cost. However, challenges like brittleness, reduced ductility, and lower elastic modulus limit their practical applications. This research examines the flexural behavior of GFRP-reinforced concrete beams using experimental and numerical methods. Nonlinear finite element analysis (FEM) was performed in ABAQUS, employing a three-dimensional deformable model, concrete damage plasticity (CDP) theory, and detailed material properties for concrete, steel and GFRP. Four-point flexural load conditions were simulated, and mesh sensitive analysis was conducted to ensure model accuracy. Experimental results demonstrated that GFRP-reinforced beams had higher load-bearing capability, but wider cracks and larger deflections compared to steel-reinforced beams. Failure of flexural members primarily due to concrete crushing was observed. Numerical simulations closely exhibited experimental load deflection performance, stress distributions, and failure patterns with accuracy variation of ~10%–16%. This study highlights the potential of FEM for correctly simulating the performance of GFRP-reinforced concrete beams and comparing the numerical outcomes with experimental studies. It was observed that GFRP-reinforced beams had 20% more load-carrying capacity compared to steel-reinforced beams based on grade of concrete and size of reinforcement. Deflection values for GFRP-reinforced beams were higher compared to steel-reinforced beam leading to requirements for serviceability considerations. The outcome of the study exhibited the potential of GFRP as a superior reinforcing material for specific applications.

Abstract Image

混凝土梁中的玻璃纤维增强聚合物条研究
玻璃纤维增强聚合物(GFRP)钢筋的使用是一种创新的方法,以取代传统的钢筋混凝土结构。GFRP筋具有显著的优点,如耐腐蚀、电磁中性、更高的重量比拉伸应力、可持续性和降低维护成本的成本效益结构。然而,脆性、延性降低和弹性模量降低等问题限制了它们的实际应用。本研究采用实验和数值方法研究了gfrp增强混凝土梁的抗弯性能。采用三维变形模型、混凝土损伤塑性(CDP)理论以及混凝土、钢和玻璃钢的详细材料特性,在ABAQUS中进行了非线性有限元分析(FEM)。模拟了四点弯曲载荷工况,并进行了网格敏感性分析,保证了模型的精度。试验结果表明,gfrp加固梁比钢加固梁具有更高的承载能力,但裂缝更宽,挠度更大。观察到受弯构件的破坏主要是由于混凝土破碎。数值模拟结果与实验载荷挠曲性能、应力分布和破坏模式接近,精度变化在10% ~ 16%之间。本研究强调了有限元法在正确模拟gfrp -钢筋混凝土梁性能方面的潜力,并将数值结果与实验研究进行了比较。根据混凝土等级和配筋尺寸的不同,gfrp增强梁的承载能力比钢增强梁高20%。gfrp加固梁的挠度值比钢加固梁高,因此需要考虑适用性。研究结果显示,GFRP作为一种优良的增强材料在特定的应用潜力。
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来源期刊
Advances in Polymer Technology
Advances in Polymer Technology 工程技术-高分子科学
CiteScore
5.50
自引率
0.00%
发文量
70
审稿时长
9 months
期刊介绍: Advances in Polymer Technology publishes articles reporting important developments in polymeric materials, their manufacture and processing, and polymer product design, as well as those considering the economic and environmental impacts of polymer technology. The journal primarily caters to researchers, technologists, engineers, consultants, and production personnel.
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