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                   Study on spatiotemporal analysis system of earth-rockfill dam seismic dynamic response
                                             under the digital twin framework

                                1               1      1             1            2            1





                          SU Zhe ，WANG Xiaoling ，YU Jia ，WANG Jiajun ，YU Hongling ，ZHANG Jun



                 （1. State Key Laboratory of Hydraulic Engineering Intelligent Construction and Operation，Tianjin University，Tianjin  300072，China；



                          2. College of Water Resources and Civil Engineering，China Agricultural University，Beijing  100083，China）

                Abstract：To address the shortcomings of current dam seismic dynamic response analysis systems，which often fail

                to  consider  the  impact  of  construction  quality  on  the  physical  and  mechanical  parameters  of  dam  materials  and

                struggle with rapid analysis and visualization of the temporal and spatial distribution of dynamic responses，this study
                proposed a method for constructing a spatiotemporal analysis system for dam seismic dynamic response under the digi‐

                tal  twin  framework.  This  approach  leveraged  the  strengths  of  digital  twins，such  as  virtual-real  mapping  and  rapid
                analysis.  The  system′s  data  foundation  integrated  high-fidelity  geometric  models，material  parameters  of  the  dam


                body，and seismic motion information through parameterized modeling，intelligent monitoring of construction qual‐

                ity，and virtual sensors. A novel heterogeneity analysis model for dam material parameters based on transfer learning

                and ResNet was introduced to accurately analyze the spatial distribution of material parameters across the entire dam，

                considering the effects of construction quality. For specialized modeling，a pix2pixHD-based surrogate model for spa‐
                tiotemporal analysis of dam seismic response is developed. This model used multi-layer generative adversarial net‐
                works to learn the temporal distribution characteristics of seismic response data and local enhancers to improve the
                authenticity of spatial distribution features in the analysis results，thereby overcoming the limitations of existing surro‐

                gate models that can only predict a few points and fail to characterize the overall spatiotemporal distribution of seismic

                dynamic responses. For system visualization，a CUDA-accelerated 3D physical field calculation method was proposed
                for visualizing dam seismic dynamic responses，addressing the issue of using pre-made animations for earthquake pro‐

                cess visualization in current research. Using an earth-rockfill dam project in southwestern China as case study，a dam
                seismic analysis system was developed within the digital twin framework. The system achieved rapid analysis and visu‐

                alization of the entire dam′s seismic dynamic response in just 148 ms，providing strong support for dam seismic safety
                assessment and decision-making.

                Keywords：dam seismic dynamic response analysis；digital twin；material parameters heterogeneity；spatiotemporal




                global surrogate model；3D physical field visualization
                                                                                     （责任编辑：王  婧）
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