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

渥太华大学和GHD之间的这项研究项目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，特别是水坝。该项目将包括对目前学术界和实践中最常用的一些有限元模型进行批判性评估，以评估混凝土中的AAR膨胀和损伤发展。将评估和讨论每种方法的优点和局限性，并提出一个实用而基本的AAR模型，考虑该现象的物理化学和各向异性效应，并提出有价值的结果，如AAR实际诱导膨胀和损伤（即诊断）以及受影响混凝土在结构使用寿命期间进一步受损的可能性（即预测）。

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.