Model Free Identification of Nonlinear Properties ofRubber-Bearings in Base-Isolated Buildings
Lei Ying 1, He Mingyu 1 and Lin Shuzhi 2
1 School of Architecture and Civil Engineering, Xiamen University, Xiamen, 361005 China2 Xiamen Construction and Management Bureau, Xiamen 360002, China
Seismic behavior of base-isolated structures is highly dependent on the nonlinear properties of the rubber-bearing isolated system. In this paper, a data-based method using only the partial measurements of structural dynamic response and excitation is proposed to identify the nonlinear property of rubber-bearing isolated system without mathematical model. First, structural parameters including the linear stiffness and damping of rubber-bearing under minor earthquake are identified based on the extended Kalman estimator approach. Then, nonlinear effect of rubber-bearing is treated as ‘additional unknown fictitious loading’ on the building under severe earthquake. By sequential application of Kalman estimator for the structural responses and the least-squares estimation of the ‘additional fictitious loading’, the nonlinear property of rubber-bearing can be identified. A numerical simulation results demonstrates that the proposed method is capable of identifying the nonlinear property of rubber-bearing isolated system with good accuracy.
雷鹰 何明煜 林树枝. 结构中基底橡胶隔震支座非线性特性的无模型识别[J]. , 2013, 32(20): 1-4.
Lei Ying;He Mingyu and Lin Shuzhi . Model Free Identification of Nonlinear Properties ofRubber-Bearings in Base-Isolated Buildings. , 2013, 32(20): 1-4.