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之间的这项研究计划和合作的主要目标是开发一个有限元分析（FEA）模型，以评估受碱骨料反应（AAR）影响的混凝土基础设施，特别是大坝。该项目将包括对学术界和实践中目前最常用的一些FEA模型进行严格评估，以评估混凝土中AAR的膨胀和损伤发展。他们每个人的优点和局限性将进行评估和讨论，并提出一个实用的，但基本的AAR模型，占物理化学和各向异性效应的现象，并提出有价值的成果，如AAR实际引起的膨胀和损坏（即诊断），以及潜在的进一步困扰受影响的混凝土（即预后）在结构的使用寿命。