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首页> 外文期刊>Engineering failure analysis >Performances, challenges and opportunities in strengthening reinforced concrete structures by using FRPs - A state-of-the-art review
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Performances, challenges and opportunities in strengthening reinforced concrete structures by using FRPs - A state-of-the-art review

机译：利用FRPS加强钢筋混凝土结构的表演，挑战和机遇 - 最先进的综述

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摘要

Structures are often subjected to extreme loading conditions that lead to their premature deterioration, and replacement of those structures before the end of their design lives is very expensive. The rehabilitation of deteriorated structures by using externally bonded fibre-reinforced polymer (FRP) composites is gaining popularity in the construction sector owing to its high strength, optimum durability and compatibility with concrete structures during application. This paper aims to review the current state-of-the-art on the performances, challenges and future opportunities of FRP-strengthened reinforced concrete (RC) structures under different loading scenarios. FRP strengthening leads to satisfactory performances under static, dynamic and extreme environmental conditions. Debonding and FRP rupture are the common types of failure observed, however, the failure mechanisms operating under the combined action of service loads and environmental exposures are still unclear. The acceptance and application of FRPs in strengthening RC structures will further increase upon developing techniques for utilising the full FRP strength, reducing the brittleness, risk of fires and accidental damage, minimising the energy consumption as well as carbon emission during production, and reducing the high initial cost. This paper also identifies the gaps in the present state of knowledge and the potential research directions for FRP-strengthened structures that lead to better understanding and establishment of design guidelines.
机译：结构经常受到极端装载条件，导致其过早恶化，并且在其设计结束之前更换这些结构非常昂贵。通过使用外部粘合的纤维增强聚合物（FRP）复合材料的劣化结构的恢复在构建部门的高度强度，最佳耐久性和与混凝土结构的相容性期间，在建筑行业中获得普及。本文旨在审查目前的现有技术，挑战和未来机遇在不同的加载方案下FRP加强钢筋混凝土（RC）结构的表现，挑战和未来机会。 FRP强化导致静态，动态和极端环境条件下的令人满意的性能。借方和FRP破裂是观察到的常见类型的失败，但是，在服务负荷和环境暴露的组合行动下运作的失败机制仍然不清楚。在强化RC结构方面的接受和应用将进一步提高利用全FRP强度的技术，降低脆性，火灾风险和意外损坏，最大限度地减少生产过程中的碳排放，减少高电平初始投资成本。本文还确定了现有知识状态的差距以及FRP加强结构的潜在研究方向，导致更好地理解和建立设计指南。

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