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首页> 外文期刊>Progress in Structural Engineering and Materials >Durability of GFRP bars: A critical review of the literature
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Durability of GFRP bars: A critical review of the literature

机译：GFRP筋的耐用性：对文献的严格审查

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摘要

The research undertaken during the last two decades has shown that one of the potential solutions to the steel-corrosion-related problems in concrete is the use of fiber-reinforced composite (FRP) reinforcement as a replacement for traditional steel bars. Glass FRP (GFRP) reinforcement is gaining more popularity in construction of bridges and in other concrete structures because of its low cost compared to Carbon FRP reinforcement. The durability of these materials, especially under severe environmental conditions, is now recognized as the most critical topic of research. The lack of data on durability of the GFRP reinforcements is a major obstacle to their acceptance on a broader scale in civil engineering. This paper summarizes the most significant research work published on the durability of FRP bars in the past two decades. A comprehensive review of the literature on the durability of FRP bars indicates a significant increase in the number of studies in this area in the last decade. The durability tests conducted by the authors and others on the latest generation of GFRP bars subjected to stresses higher than the design limits, combined with aggressive mediums at elevated temperatures, have concluded that the strength reduction factors adopted by current codes and guidelines are conservative. These factors were based on limited test results that were carried out on the early generations of the GFRP products, which have now substantially changed.
机译：在过去的二十年中进行的研究表明，混凝土中与钢腐蚀有关的问题的一种潜在解决方案是使用纤维增强复合材料（FRP）增强材料来替代传统的钢筋。玻璃纤维增​​强塑料（GFRP）增强材料在桥梁和其他混凝土结构中的应用越来越广泛，因为与碳纤维增强玻璃纤维增​​强材料相比，其成本较低。这些材料的耐用性，特别是在恶劣的环境条件下，现已被认为是研究的最关键课题。缺乏GFRP增强材料耐久性的数据是其在土木工程中被更广泛接受的主要障碍。本文总结了过去20年间有关FRP钢筋耐久性的最重要研究成果。对FRP钢筋耐久性的文献的全面回顾表明，在过去十年中，该领域的研究数量显着增加。作者和其他人对最新一代的GFRP钢筋进行的耐久性试验承受的应力高于设计极限，再加上高温下的侵蚀性介质，得出的结论是，当前法规和准则采用的强度降低系数是保守的。这些因素是基于对早期GFRP产品进行的有限测试结果而得出的，现在这些产品已经发生了很大变化。

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