The concrete face slab is the primary anti-seepage component of concrete faced rockfill dams (CFRDs). Therefore, the seismic safety of the slab is an important issue. In this paper, the cohesive zone model and the explicit solution are expanded to conduct 3D seismic failure analysis of a CFRD. A combination of the generalized plasticity model of rockfill, state-dependent elasto-plastic model of soil-structure interfaces, a non-uniform wave input method and the scaled boundary finite element method is used to perform an elasto-plastic, cross-scale analysis of the seismic cracking evolution of concrete face slabs. The above combined method is used to investigate the cracking mechanism, cracking characteristics and potential anti-seismic measures. The results indicate that the cyclic deformation caused by the earthquake results in the formation of horizontal, connected cracks in the middle of the slab at 70–75% of the dam height. In addition, the plastic deformation of the rockfill leads to the formation of horizontal, unconnected cracks on both sides of the slab at 85% of the dam height. A comprehensive anti-seismic measure is proposed based on material property improvement and structural optimization, decreasing the maximum crack width and the total crack length by 21% and 89.9%, respectively.

混凝土面板是混凝土面板堆石坝（CFRD）的主要防渗构件。因此，楼板的抗震安全是一个重要的问题。在本文中，将粘性带模型和显式解扩展到CFRD 的3D 地震破坏分析。结合堆石的广义塑性模型、土-结构界面的状态相关弹塑性模型、非均匀波输入法和比例边界有限元法进行弹塑性跨尺度分析混凝土面板抗震开裂演化研究[J]. 采用上述组合方法研究开裂机理、开裂特征和潜在的抗震措施。结果表明，地震引起的循环变形导致在大坝高度的 70-75% 的板中间形成水平的、连接的裂缝。此外，堆石料的塑性变形导致板坯两侧85%的坝高处形成水平的、不连通的裂缝。提出了基于材料性能改进和结构优化的综合抗震措施，最大裂缝宽度和总裂缝长度分别减少了21%和89.9%。