由于认知水平、检验方法、试验环境等局限以及活性骨料误选或被动取用等原因，造成ASR(碱硅酸反应)诱发混凝土病变在水工领域尚难完全避免，破坏风险不可丝毫轻视。项目致力于水工混凝土结构ASR诱发型病变的科学诊断，突出强调多尺度的交互，充分考虑材料与结构特征、环境与约束特点、功能与安全要求，在深层剖析水工混凝土ASR进程多因素联合驱动机制基础上，借助多学科交叉和理论推演、数值仿真、物模试验、原观分析等多手段结合，深入开展水工混凝土结构ASR诱发型病变致因解析、特征辨识、监测预警、破坏评估等内容的协同研究，以期提出ASR影响下水工混凝土结构宏细观性态演化的递阶分析方法，建立ASR诱发结构变形与开裂的时空预测模型，创新ASR诱发型病变的原型监测识别模式，发展ASR诱发结构破坏的概率评估方法，深化水工混凝土力学性能ASR致劣机理、诱发病变时空多维度特征与主控因素、受侵害结构破坏模式与失效路径等的认知。

Due to limitations in cognitive level, test methods, test environment and considering mis-selection or passive use of active aggregates, alkali-silica reaction (ASR) damage is difficult to be completely avoided for the hydraulic engineering. Therefore, the risk of ASR damage should not be underestimated. The project is dedicated to the comprehensive diagnosis of ASR-induced lesions in concrete structures such as dams and sluices, highlighting multi-scale interactions, taking into account material and structural characteristics, environmental and constraints features, requirements of structural function and safety. Based on analysis of the multi-factor joint driving mechanism of ASR process, it is the multi-disciplinary knowledge intersection and theoretical deduction, numerical simulation, laboratory test, and situ data analysis that are used together to deeply research on the cause, identification method of ASR-induced lesions in hydraulic concrete structures. Besides, setting early warning index and damage assessment method is also the aim of the project. When the project is finished, a hierarchical analysis method for the macroscopic and mesoscopic evolution of hydraulic concrete structures affected by ASR will be proposed, and a space-time prediction model for ASR-induced structural deformation and cracking will be established. Besides, based on the hierarchical analysis method, the space-time prediction model and situ monitoring data, a diagnosis model for ASR existence, the main driving factors and lesions development will be presented, and a probability assessment method will be improved and applied in the ASR-affected structure. This project can deepen the understanding of ASR-induced damage mechanism in terms of mechanical properties and structural behavior for hydraulic concrete structure, impact characteristics of multi-dimensional factors for ASR and main controlling factors of ASR-induced lesions, and failure modes and failure paths of ASR-affected structures.