高碾压混凝土坝在全生命周期设计中可能遭遇爆炸等高应变率动力冲击作用，然而我国在200m级高坝全生命周期建设运行方面的经验较少，在重大碾压混凝土坝工程的爆炸损伤机理和抗爆防护机制等基础理论方面研究不足。本课题针对高碾压混凝土坝爆炸冲击作用下存在结构-爆炸环境介质耦合效应显著的特点，首先在材料层面考虑水工碾压混凝土组分特点、碾压成层特点和赋存水环境特点，进行符合大坝碾压混凝土赋存特点的材料动态力学性能测试，揭示碾压混凝土本身的结构效应、层间结合带效应并解耦其真实应变率效应；其次，在实验基础上改进通用软件中的混凝土类宏观材料模型参数，开发契合水下碾压混凝土特点的冲击动力学材料模型；最后，基于修正后碾压混凝土冲击动力学材料模型，进行工程尺度的碾压混凝土结构数值分析，为重大水工结构抗爆分析理论体系的建立提供技术支撑。

The roller compacted concrete (RCC) dam may be subjected to explosion and other dynamic impact loads during its lifecycle. However, the theoretical foundation of damage mechanism and anti-explosion protection mechanism is weak with little construction and operation experiences for 200m-lever dams. The project work on impact dynamic properties and material model of RCC under high strain rates considering medium effect of explosion environment. Firstly, dynamic properties and their influencing factors of RCC under high strain rates are studied, structural bedding surface effect will be revealed and the true strain rate effect will be decoupled. Secondly, the parameters of concrete impact material model in general software are improved and a novel impact material model will be developed for RCC material. Finally, numerical analysis of small scale RCC dams are made for verification based on calibrated RCC material model, it will provide technical support for the establishment of theoretical system of anti-explosion analysis for RCC dams.