Modeling Concrete Infrastructure Affected by Alkali-Aggregate Reaction (AAR)

模拟受碱骨料反应 (AAR) 影响的混凝土基础设施

• 批准号: 515351-2017
• 负责人: MorettiSanchez, LeandroFrancisco
• 金额: $ 1.82万
• 依托单位: University of Ottawa
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=639854
• 关键词: Modeling; Concrete; Infrastructure; Affected; Alkali

The main objective of this research program & collaboration between uOttawa and GHD is to develop a finite element analysis (FEA) model to assess concrete infrastructure affected by alkali-aggregate reaction (AAR), especially dams. This project will include a critical assessment of some of the currently most used FEA models in both academia and practice to assess AAR expansion & damage development in concrete. Advantages and limitations of each of them will be evaluated and discussed and a practical, yet fundamental AAR model will be proposed, accounting for the physicochemical and anisotropic effects of the phenomenon and presenting valuable outcomes such as AAR actual induced expansion and damage (i.e. diagnosis) as well as the potential for further distress of affected concrete (i.e. prognosis) over the service life of the structure.

Uottawa和GHD之间的研究计划和协作的主要目的是开发有限元分析（FEA）模型，以评估受碱性凝集反应（AAR）（尤其是dams）影响的具体基础设施。该项目将包括对学术界和实践中当前最常用的FEA模型的批判性评估，以评估混凝土中AAR扩展和损害的开发。将评估和讨论它们每个的优势和局限性，并提出实用但基本的AAR模型，这考虑了该现象的物理化学和各向异性效应，并带来了有价值的结果，例如AAR实际诱导的扩张和损害（即诊断）以及对结构使用寿命的影响混凝土（即预后）进一步困扰的潜力。