In this study, finite element (FE) analyses were conducted on a reinforced-concrete (RC) shear wall that is affected by an alkali–aggregate reaction (AAR), which were then applied for a benchmark studies in OECD/NEA/CNSI/ASCET (Organization for Economic Co-operation and Development/Nuclear Energy Agency/Committee on Safety of Nuclear Installations/Assessment of Structures subjected to Concrete Pathologies) Phases II and III assessments. A commercial software has been modified to account for this AAR expansion, which is affected by the stress field and change in physical properties of the concrete. The impacts of boundary conditions, modeling in two and three dimensions, and material properties on the load–displacement curve and crack patterns were carefully evaluated. Finally, although similar load–displacement curves and crack patterns were obtained, the peak load due to brittle failure of an RC shear wall affected by AAR could not be reproduced.

Consequently, it was found that the rotation of the loading stub and anchoring procedure of the base stub were critical conditions for load-displacement relationship of RC shear wall, and meshing capturing the arrangement of reinforcement bars is crucial for FE analysis with two-dimensional (2D) condition, and finally, the occurrence of initial cracks and the loading capacity could not be clearly reproduced. This suggests that consideration of the placement of rebars and covering concrete in the mash setting in three-dimensional (3D) model affected the failure mode of the concrete. It is necessary to consider the possible failure mechanism and to reflect such features in numerical modeling.

在这项研究中，对受碱-骨料反应（AAR）影响的钢筋混凝土（RC）剪力墙进行了有限元（FE）分析，然后将其应用于OECD / NEA / CNSI / ASCET（经济合作与发展组织/核能机构/核装置安全/遭受具体病理状况的结构评估委员会）第二阶段和第三阶段评估。修改了商用软件以解决这种AAR扩展问题，这种扩展受应力场和混凝土物理特性变化的影响。仔细评估了边界条件，二维和三维建模以及材料特性对载荷-位移曲线和裂纹模式的影响。最后，

因此，发现加载桩的旋转和基础桩的锚固过程是RC剪力墙荷载-位移关系的关键条件，而捕捉钢筋排列的网格对于二维有限元分析至关重要。 2D）条件，最后，不能清楚地再现出初始裂纹的发生和承载能力。这表明，考虑在三维（3D）模型中的混搭设置中放置钢筋和覆盖混凝土会影响混凝土的破坏模式。有必要考虑可能的失效机理，并在数值建模中反映这些特征。