Fire performance of durable concrete structures reinforced with Fibre Reinforced Polymer (FRP) bars

使用纤维增强聚合物 (FRP) 棒加固的耐用混凝土结构的防火性能

• 批准号: RGPIN-2020-06312
• 负责人: Hajiloo, Hamzeh
• 金额: $ 1.89万
• 依托单位: Carleton University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=749054
• 关键词: Fire; performance; durable; concrete; structures

The financial burden and the environmental impacts of replacing a large number of decaying and crumbling structures are onerous. With over 4 billion tons of cement produced annually, the cement industry produces 8% of global CO2 emissions on the planet. The highest-ever concerns regarding climate change and demands civil engineering society to seek more sustainable, durable, and long-lasting construction materials and methods. Fibre Reinforced Polymer (FRP) reinforcement is a viable alternative for the corrosion-prone steel reinforcement in reinforced concrete (RC) structures. There is adequate knowledge on FRP RC structural members at ambient temperature, and FRP reinforcement has been successfully used in many concrete structures. However, there is a lack of a holistic understanding of the fire performance of FRP RC structures in fires. The existing knowledge critically lacks extensive experimental and numerical studies which would ultimately allow moving towards generating rational, practical and detailed design guidelines for fire safety of FRP RC structures. This proposal supports a comprehensive research program with the overarching objective of achieving an in-depth and fundamental understanding of the structural performance of FRP reinforced concrete members and structures. The long-term objective of the proposed research program is to gain fundamental understandings leading to rational and performance-based fire safety design of FRP RC structures. This program aims to ensure the fire safety of FRP RC and public safety before massive FRP RC constructions can finally be undertaken. To accomplish the long-term goals, the specific short-term objectives are to: (1) further characterize the bond behaviour of FRP reinforcing bars at high temperatures and investigate the effects of higher glass transition temperature on the bond performance; (2) conduct medium and large-scale fire tests on FRP RC structural components; and (3) extend the modelling capabilities from single-member level to a more sophisticated structural level to examine the full-frame response in fire. The practical implications of this research program will serve the needs of Canadian as well as international codes (e.g. ACI 440.1R) for key updates. Canada has always held a leading role in developing provisions for FRP reinforcement (e.g. CSA-S6 and CSA-S806), and these codes are used around the world. The CSA-S806 uniquely has detailed provisions for fire safety design of FRP RC slabs which need to be directed towards more rational and performance-based design approaches. The current and prescriptive design guidelines recommend the thickening of concrete cover which lowers the design efficiency and requires a substantial amount of expensive FRP to be used. This research program will train 9 HQP, and they will be the future's professional engineers and researchers in Canada to fulfill the structural fire safety requirements.

更换大量腐烂和摇摇欲坠的建筑物的经济负担和环境影响是巨大的。水泥行业每年生产超过 40 亿吨水泥，其二氧化碳排放量占全球的 8%。人们对气候变化的高度关注，要求土木工程学会寻求更可持续、更耐用、更持久的建筑材料和方法。纤维增强聚合物 (FRP) 加固是钢筋混凝土 (RC) 结构中易腐蚀钢筋的可行替代方案。人们对常温下FRP RC结构构件已有足够的了解，并且FRP加固已成功地应用于许多混凝土结构中。然而，人们对FRP RC结构在火灾中的防火性能缺乏全面的了解。现有知识严重缺乏广泛的实验和数值研究，而这些研究最终将有助于为 FRP RC 结构的消防安全制定合理、实用和详细的设计指南。该提案支持一项综合研究计划，其总体目标是对 FRP 钢筋混凝土构件和结构的结构性能进行深入和基本的了解。拟议研究计划的长期目标是获得基本了解，从而对 FRP RC 结构进行合理且基于性能的消防安全设计。该计划旨在在最终进行大规模玻璃钢RC施工之前确保玻璃钢RC的消防安全和公共安全。为了实现长期目标，具体的短期目标是：（1）进一步表征FRP钢筋在高温下的粘结行为，并研究较高的玻璃化转变温度对粘结性能的影响； （2）对FRP RC结构构件进行中、大型防火试验； (3) 将建模能力从单构件级别扩展到更复杂的结构级别，以检查火灾中的全框架响应。该研究计划的实际意义将满足加拿大和国际规范（例如 ACI 440.1R）关键更新的需求。加拿大在制定 FRP 加固规定（例如 CSA-S6 和 CSA-S806）方面始终处于领先地位，这些规范在世界各地使用。 CSA-S806 对 FRP RC 板的消防安全设计有独特的详细规定，需要采取更合理和基于性能的设计方法。当前和规范的设计指南建议加厚混凝土保护层，这降低了设计效率并且需要使用大量昂贵的玻璃钢。该研究计划将培训9名HQP，他们将成为加拿大未来满足结构消防安全要求的专业工程师和研究人员。