Multi-step prediction for time histories of seismic responses of tall building structure subjected to strong earthquake ground motions
Yang Dixiong1,2 Yang Kaisheng1,2 Guo Guiqiang1,2
1. Department of Engineering Mechanics, Dalian University of Technology, Dalian 116023, China
2. State Key Laboratory for Structural Analysis of Industrial Equipment, Dalian University of Technology, Dalian 116023, China
Abstract：This paper proposes a new multi-step prediction method of EMD-ELM (empirical mode decomposition-extreme learning machine), and achieves the multi-step prediction for time histories of top story’s acceleration and displacement responses of elasto-plastic tall frame structure subjected to near-fault strong earthquake ground motions. Firstly, the seismic responses of tall structure with nonlinear and nonstationary property were decomposed into several components of intrinsic mode functions (IMFs) with different characteristic scales by the technique of EMD. Subsequently, the ELM method was utilized to conduct the multi-prediction of the IMF components. Moreover, the predicted values of each IMF component were superimposed to obtain the final predicted result of structural response. It is demonstrated that the EMD-ELM method can realize the multi-step prediction of seismic responses of tall building under strong ground motions with relatively high accuracy. Short-term prediction for time histories of seismic responses of building structures can provide in advance accurate dynamic responses for active and semi-active control system, thus facilitate the real-time online vibration-reduction control of engineering structures.
杨迪雄 杨开胜 郭贵强. 强震作用下高层结构地震响应时程的多步预测[J]. 土木工程学报, 2016, 49(S1): 25-31.
Yang Dixiong Yang Kaisheng Guo Guiqiang. Multi-step prediction for time histories of seismic responses of tall building structure subjected to strong earthquake ground motions. 土木工程学报, 2016, 49(S1): 25-31.
