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Replacement of steel with GFRP for sustainable reinforced concrete
Construction and Building Materials ( IF 7.4 ) Pub Date : 2017-12-28 , DOI: 10.1016/j.conbuildmat.2017.12.141
Shamim A. Sheikh , Zahra Kharal

Corrosion of steel in reinforced concrete structures has cost a significant amount of resources globally over the past few decades. Glass fiber reinforcement polymer (GFRP) bars present a feasible and cost-effective solution to the problem of steel corrosion. The aim of this paper is to let engineers gain a better understanding of the overall behavior of GFRP as internal reinforcement so that they have more confidence using it as a sustainable material. This paper provides a few significant outcomes from an extensive experimental program underway at the University of Toronto. The work discussed here provides a summary of the tests on 24 GFRP reinforced beams, 60 GFRP direct tension specimens and 20 GFRP confined columns, and evaluates the behavior of GFRP-RC in flexure, shear, tension and compression. A recently proposed tension-stiffening model has been incorporated in analytical modeling of GFRP-RC beams and the results show significant improvement in the prediction of deflection and stiffness of the beams. Results from column tests show that GFRP bars used as longitudinal reinforcement can resist compressive stresses in excess of 700 MPa and GFRP lateral reinforcement can confine concrete core more effectively than steel.



中文翻译:

用GFRP替代钢材以实现可持续的钢筋混凝土

在过去的几十年中,钢筋在钢筋混凝土结构中的腐蚀已在全球花费了大量资源。玻璃纤维增​​强聚合物(GFRP)条为钢腐蚀问题提供了一种可行且具有成本效益的解决方案。本文的目的是让工程师更好地了解作为内部增强材料的GFRP的整体性能,以便他们更有信心使用GFRP作为可持续材料。本文提供了多伦多大学正在进行的广泛实验计划的一些重要成果。此处讨论的工作总结了24根GFRP增强梁,60根GFRP直接拉伸试样和20根GFRP约束柱的测试结果,并评估了GFRP-RC在挠曲,剪切,拉伸和压缩方面的行为。GFRP-RC梁的分析模型中采用了最近提出的拉力-刚度模型,结果表明梁的挠度和刚度的预测有了显着改善。柱试验的结果表明,用作纵向钢筋的GFRP筋可以抵抗超过700 MPa的压缩应力,而GFRP侧筋可以比钢更有效地约束混凝土芯。

更新日期:2017-12-28
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