Nonlinear identification of base-isolated buildings by reverse path method

Liyu Xie; Akira Mita

doi:10.1117/12.815615

30 March 2009 Nonlinear identification of base-isolated buildings by reverse path method

Liyu Xie, Akira Mita

Author Affiliations +

Proceedings Volume 7292, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2009; 72921X (2009) https://doi.org/10.1117/12.815615
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2009, San Diego, California, United States

Abstract

The performance of reverse path methods applied to identify the underlying linear model of base-isolated structures is investigated. The nonlinear rubber bearings are considered as nonlinear components attached to an underlying linear model. The advantage of reverse path formulation is that it can separate the linearity and nonlinearity of the structure, extract the nonlinearity and identify the underlying linear structure. The difficulty lies in selecting the nonlinearity function of the hysteretic force due to its multi-valued property and path-dependence. In the thesis, the hysteretic force is approximated by the polynomial series of displacement and velocity. The reverse path formulation is solved by Nonlinear Identification through Feedback of Output (NIFO) methods using least-square solution. Numerical simulation is carried out to investigate the identification performance.

Citation Download Citation

Liyu Xie and Akira Mita "Nonlinear identification of base-isolated buildings by reverse path method", Proc. SPIE 7292, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2009, 72921X (30 March 2009); https://doi.org/10.1117/12.815615

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