AN Chao,SHI Jianyong,PAN Zeyu,et al.Research on Prediction Method of Structural Seismic Response Based on Ensemble Learning[J].Journal of Disaster Prevention and Mitigation Engineering,2023,43(03):435-443.
AN Chao,SHI Jianyong,PAN Zeyu,et al.Research on Prediction Method of Structural Seismic Response Based on Ensemble Learning[J].Journal of Disaster Prevention and Mitigation Engineering,2023,43(03):435-443. DOI: 10.13409/j.cnki.jdpme.20221125002.
Research on Prediction Method of Structural Seismic Response Based on Ensemble Learning
In order to obtain the displacement response of building structures in the earthquake process, and solve the delay problem in the active control of structures, ensemble learning was used to predict the seismic structural response. In this paper, an ensemble learning model is proposed for the prediction of ground motion response of structures. Different neural networks and loss functions are combined as the base learners, then a Fully Connected Neural Network is used to construct a second-level learner to obtain the final prediction model. Bidirectional ground motion acceleration and structural displacement response are used as inputs to predict the short-term structural seismic response. This model could realize multi-step prediction of structural seismic response and dynamic outputs. Several numerical experiments are carried out on a steel frame structure, and the experimental results show that the prediction results of the integrated model is better than those of the single model, and all models display a trend of prediction errors increasing with the increase of the prediction time. When the model’s predicted value reaches a certain threshold for the first time, the prediction result will be sent to the active control system, so the structure vibration control will be carried out in advance without waiting for the real response data collected by displacement sensors, thereby reducing or even negating the influence of time delay in active control.
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