Advances in Durability Performance and Service-life Prediction of Innovative Fibre-Reinforced Polymer (FRP) Bars

创新纤维增强聚合物 (FRP) 棒的耐久性能和使用寿命预测方面的进展

• 批准号: RGPIN-2015-06242
• 负责人: Benmokrane, Brahim
• 金额: $ 3.93万
• 依托单位: Université de Sherbrooke
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 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=690429
• 关键词: Advances; Durability; Performance; Service; life

Corrosion of steel reinforcement in concrete infrastructure is a major durability problem, leading to structural degradation and consequent costly repairs and loss of serviceability. According to the 2012 Canadian Infrastructure Report Card, a significant amount of Canadian municipal infrastructure ranks between "fair" and "very poor" (about 35%, on average). Replacing these assets nationally would alone total $171.8 billion. A relatively recent solution receiving global attention is fibre-reinforced-polymer (FRP) reinforcing bars as a cost-effective alternative to conventional steel bars. Given their corrosion resistance, light weight, and high strength, FRP bars have been used in Canada for the last 20 years for infrastructure such bridge decks, parking garages, and continuous pavements. The lack of appropriate data about the long-term durability poses a major obstacle to broader acceptance and mass implementation of FRP bars.***This Discovery Grant (DG) includes new, innovative research, in addition to extending the long-term laboratory and field experiments needed to develop and validate the performance of new generations of FRP bars with enhanced durability properties and high performance / cost ratios. The proposed work will investigate the long-term performance of new advanced materials and FRP products, yield understanding and modeling FRP-bar degradation mechanisms, and validate rigorous methods of predicting FRP-bar performance in terms of constituents, composites, and FRP-reinforced concrete members over a long period of time. This would be done with a view to using fundamental scientific findings to improve the durability performance of FRP bars and the design of economic concrete structures reinforced with FRP bars. Comprehensive methods will be employed to examine the impact of various physical/environmental/load/synergetic parameters on long-term performance. This Discovery Grant will push back the boundaries of knowledge about FRP bars incorporating a new class of glass fibres, new basalt fibres, resin systems with low permeability, and new materials such as nanocomposites. The proposed work is transformative because it will lead to new FRP bars with greater durability and physical/mechanical properties, to accurate performance predictive models, and to development of durability-based code specifications. This will benefit Canadian and international design consultants and regulators, owners, and the construction industry, all of whom will be able to place greater confidence in these structural materials. In addition, as Canada's leader in developing and successfully using FRP-bar technology in infrastructure applications, this research will maintain/enhance Canada's leadership in this industry. The proposed research will be implemented through the training of 8 doctoral and 2 master's students.**

混凝土基础设施中钢筋的腐蚀是一个主要的耐用性问题，导致结构性降解以及因此昂贵的维修和丧失可用性。根据2012年加拿大基础设施报告卡，加拿大市政基础设施在“公平”和“非常贫穷”之间排名（平均约为35％）。在全国范围内取代这些资产将总共1718亿美元。相对较新的解决方案受到全球关注的是纤维增强 - 聚合物（FRP）增强条，作为传统钢棒的经济高效替代品。鉴于它们的耐腐蚀性，轻巧和高强度，在过去的20年中，加拿大使用了FRP棒，用于此类桥梁甲板，停车场和连续的人行道。缺乏有关长期耐用性的适当数据为更广泛的接受和大规模实施FRP栏构成了主要障碍。***此发现赠款（DG）包括新的，创新的研究需要进行现场实验，以开发和验证具有增强耐用性和高性能 /成本比率的新一代FRP棒的性能。拟议的工作将研究新的高级材料和FRP产品的长期性能，产生理解和建模frp-bar降解机制，并验证严格的方法来预测成分，复合材料和frp-reiNforced Concrete的frp-bar性能成员很长一段时间。这将是为了使用基本的科学发现来提高FRP棒的耐用性能以及由FRP棒增强的经济混凝土结构的设计。将采用全面的方法来检查各种物理/环境/负载/协同参数对长期性能的影响。这项发现赠款将推迟有关FRP棒的知识界限，其中包括新的玻璃纤维，新的玄武岩纤维，渗透率低的树脂系统以及纳米复合材料等新材料。拟议的工作具有变革性，因为它将导致具有更大耐用性和物理/机械性能的新的FRP棒，以准确的性能预测模型以及基于耐用性的代码规范的开发。这将使加拿大和国际设计顾问，监管机构，所有者以及建筑行业受益，所有这些行业都将能够对这些结构材料更加信心。此外，作为加拿大在基础设施应用中开发和成功使用FRP-BAR技术领域的领导者，这项研究将维持/增强加拿大在该行业的领导能力。拟议的研究将通过培训8位博士和2名硕士学生来实施。**