Bond performance of FRP bars in concrete under monotonic, cyclic and fatigue loading

单调荷载、循环荷载和疲劳荷载下 FRP 筋在混凝土中的粘结性能

• 批准号: 543523-2019
• 负责人: Galal, Khaled
• 金额: $ 4.37万
• 依托单位: Concordia University
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=690906
• 关键词: Bond; performance; FRP; bars; concrete

The deterioration of steel-reinforced concrete infrastructure due to the harsh environment and corrosion is one of the significant challenges facing the Canadian construction industry. Therefore, engineering firms aim for designing infrastructure systems that are stronger, last longer, are more resistant to corrosion, cost less to build and maintain, as well as being resilient in case of extreme loading events. A feasible solution to increase the service life of structures is to use corrosion-resistant materials, such as high-performance fibre-reinforced polymer (FRP) composites. While there have been a multitude of studies recently published on the bond properties of some glass fibre-reinforced polymer (GFRP) bars, there is a gap in the literature with respect to the bond behaviour under cyclic and fatigue loading. The main objective of this collaborative research and development project is to evaluate the complete bond-slip relationship of GFRP bars under various conditions. The project will quantify, experimentally and numerically, the effect of critical influencing factors, namely, bar diameter, surface coatings, surface configuration, loading type and suitable combinations of these factors, on the bond-slip behaviour. This will assist FRP manufacturing companies to improve the characteristics of their FRP products further, enhance their long-term bond performance, and help engineers and stakeholders to utilize this innovative technology with greater certainty. The findings will help develop design guidelines and limitations for structures. This proposed research will be carried out in collaboration with experts from GFRP manufacturing companies, design firms, and infrastructure owners to generate new and complementary experimental and analytical fundamental knowledge, practical advancements, code design provisions, and prescriptive detailing requirements. Additional benefits for Canada will include training of HQP, with a global competitive edge for the design of structures using the state-of-the-art research and emerging technologies.

由于环境恶劣和腐蚀而导致的钢筋混凝土基础设施的恶化是加拿大建筑业面临的重大挑战之一。因此，工程公司旨在设计更强大，持续时间更长的基础架构系统对腐蚀更具抵抗力，建造和维护的成本更低，并且在发生极端装载事件的情况下具有弹性。一种可行的解决方案来提高结构的使用寿命，是使用耐腐蚀的材料，例如高性能纤维增强聚合物（FRP）复合材料。虽然最近有许多有关某些玻璃纤维增​​强聚合物（GFRP）棒的键特性的研究，但文献中关于循环和疲劳载荷下的键行为方面存在差距。 该协作研究与发展项目的主要目的是评估在各种条件下GFRP棒的完整粘结关系。该项目将在实验和数字上量化关键影响因子的影响，即条形直径，表面涂层，表面构型，负载类型以及这些因素的合适组合对粘结滑滑行为。这将有助于FRP制造公司进一步提高其FRP产品的特征，提高其长期债券绩效，并帮助工程师和利益相关者更确定地利用这项创新技术。这些发现将有助于制定结构的设计准则和局限性。 这项拟议的研究将与GFRP制造公司，设计公司和基础设施所有者的专家合作进行，以生成新的和互补的实验和分析基本知识，实践进步，代码设计规定以及规定的细节要求。加拿大的其他好处将包括对HQP的培训，并具有使用最先进的研究和新兴技术设计结构的全球竞争优势。