Hybrid model for concrete dam deformation in consideration of residual correction by frequency division

作者：Bowen Wei, Shaoyang Luo, Fu-gang Xu, Huokun Li, Liangjie Chen, Liu Bo · 发表于：Structural Control and Health Monitoring · 年份：2022 · DOI：10.1002/stc.2940 · 被引用次数：22 · 研究领域：Dam Engineering and Safety、Geotechnical Engineering and Analysis、Hydraulic flow and structures

The traditional statistical models for concrete dam deformation do not consider the effective contribution to residual sequence and thus results in the low accuracy of deformation prediction of the monitoring model and in the insufficient prediction of dam deformation behavior. This study proposes a combined model for concrete dam deformation, considering residual correction by frequency division. The horizontal displacement of concrete dams is driven by water pressure, temperature, and aging factors. In this study, an accurate value of water pressure deformation is obtained by finite element calculation, and then the hybrid model is constructed. However, the temperature and aging components hardly obtain accurate information values from the traditional model. Therefore, a combined model is constructed to extract additional detailed information that characterizes the dam deformation from the residual sequence. Ensemble empirical mode decomposition is selected to analyze and denoise the residual sequence adaptively, and the consecutive mean square error is used to determine the boundary points of high- and low-frequency components. Then, the combined model based on the extreme learning machine method optimized by particle swarm optimization and seasonal autoregressive integrated moving average is constructed for high- and low-frequency sequences. Lastly, the prediction results of different subitems are organically integrated. Results of a case study in engineering demonstrate ...