The alkali silica reaction (ASR) is a complex multifaceted deleterious one with broad implications on the structural integrity of a nuclear concrete containment (NCC). When compounded with seismic excitation, the structural assessment is even more complex, specially when its intrinsic shear strength is not yet well understood. This paper will highlight 3 years of a holistic research on the pre-cited problem, highlighting the interaction of various tasks, while details can be found in referenced publications. The reported work is broken into four integrated parts: (a) Design of a reactive concrete mix representative of the one in an NCC and likely to expand sufficiently within 6 months; (b) Specimens expansion monitoring in terms of different dimensions and reinforcement ratios for a year; (c) Large-scale testing of shear specimens to evaluate both material (no reinforcement) and structural (with reinforcement) components to assess impact of ASR; and (d) 3D probabilistic nonlinear seismic analyses of an NCC subjected to 40 years of ASR expansion followed by multiple dynamic excitation. It will be shown that the true shear strength of concrete material is affected by ASR, and that this reduction will reduce the seismic resistance of an NCC.

中文翻译：

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ASR 影响核混凝土安全壳的综合实验和数值研究

碱性二氧化硅反应 (ASR) 是一种复杂的多方面有害反应，对核混凝土安全壳 (NCC) 的结构完整性具有广泛影响。当与地震激发复合时，结构评估更加复杂，特别是当其内在抗剪强度尚不清楚时。本文将重点介绍 3 年来对预先引用问题的整体研究，重点介绍各种任务的相互作用，而详细信息可以在参考出版物中找到。报告的工作分为四个整体部分： (a) 设计一种反应性混凝土混合物，代表 NCC 中的混合物，并可能在 6 个月内充分扩展；(b) 一年内不同尺寸和配筋率的试样膨胀监测；(c) 对剪切试样进行大规模测试，以评估材料（无加固）和结构（有加固）组件，以评估 ASR 的影响；(d) 经过 40 年的 ASR 扩展，然后是多次动态激发的 NCC 的 3D 概率非线性地震分析。将表明混凝土材料的真实抗剪强度受 ASR 的影响，这种降低将降低 NCC 的抗震性。