玻璃纤维增强聚合物(GFRP)结构型材柱在轴压作用下的性能

IF 0.7 4区 材料科学 Q4 METALLURGY & METALLURGICAL ENGINEERING
Sanjana S. Kumar, Rahul Kumar Sonker, Senthilkumar Rajendran
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引用次数: 0

摘要

摘要:玻璃纤维增强塑料(GFRP)结构型材因其高强度、高抗拉强度、高绝缘性能、耐化学性、抗疲劳性能和较低的维护成本,在建筑行业中是传统建筑材料的一个很有前途的替代品。本研究旨在评估半致密和细长玻璃纤维增强塑料工字截面的压缩性能。细长和半紧凑的i型截面的短、中间和长柱受到轴向压缩,并将实验能力与现有的理论结果进行了比较。结果表明,短柱、半密实柱和长柱的试验承载力分别比半密实工字截面的理论承载力低27%、49%和40%。较短的细长截面的极限承载力比理论结果大55%。然而,与理论容量相比,在细长截面的情况下,中长柱的极限容量较低。细长截面容易发生整体屈曲和局部屈曲,而半致密截面仅受整体屈曲破坏。研究还得出结论,考虑屈曲特性,需要对玻璃纤维增强塑料截面进行适当的截面分类。现有的承载能力估算理论公式过于保守;因此,有必要进行数值和参数研究,以建立更符合实验结果的方程。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Behaviour of glass fiber reinforced polymer (GFRP) structural profile columns under axial compression
Abstract Glass fiber-reinforced plastic (GFRP) structural profiles in the construction industry are a promising alternative to conventional building materials due to their high strength-to-weight ratio, high tensile strength, insulation properties, chemical resistance, fatigue properties, and lower maintenance cost. This study aims to evaluate the compression behaviour of semi-compact and slender glass fiber-reinforced plastic I-sections. Short, intermediate, and long columns of both slender and semi-compact I-sections were subjected to axial compression, and the experimental capacity was compared to available theoretical results. It was found that the experimental capacity of short, semi-compact, and long columns were 27 %, 49 %, and 40 % lower than the theoretical capacity of semi-compact I-sections. Short slender sections had an ultimate experimental capacity 55 % greater than the theoretical results. However, lower ultimate capacities were achieved for intermediate and long columns in the case of slender sections when compared to the theoretical capacity. Slender sections were prone to both global and local buckling, whereas semi-compact sections failed by global buckling alone. The study also concludes the need for proper section classification of glass fiber-reinforced plastic sections to consider buckling characteristics. The existing theoretical equations to estimate the load-carrying capacity was found to be overly conservative; hence it is necessary to conduct numerical and parametric studies to develop equations that are more in agreement with the experimental results.
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来源期刊
CiteScore
1.30
自引率
12.50%
发文量
119
审稿时长
6.4 months
期刊介绍: The International Journal of Materials Research (IJMR) publishes original high quality experimental and theoretical papers and reviews on basic and applied research in the field of materials science and engineering, with focus on synthesis, processing, constitution, and properties of all classes of materials. Particular emphasis is placed on microstructural design, phase relations, computational thermodynamics, and kinetics at the nano to macro scale. Contributions may also focus on progress in advanced characterization techniques. All articles are subject to thorough, independent peer review.
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