Parameter identification of hysteretic model of rubber-bearing based on sequential nonlinear least-square estimation |
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Authors: | Qiang Yin Li Zhou Xinming Wang |
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Affiliation: | MOE Key Lab of Structure Mechanics and Control for Aircraft, Institute of Structures & Strength, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China |
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Abstract: | In order to evaluate the nonlinear performance and the possible damage to rubber-bearings (RBs) during their normal operation
or under strong earthquakes, a simplified Bouc-Wen model is used to describe the nonlinear hysteretic behavior of RBs in this
paper, which has the advantages of being smooth-varying and physically motivated. Further, based on the results from experimental
tests performed by using a particular type of RB (GZN110) under different excitation scenarios, including white noise and
several earthquakes, a new system identification method, referred to as the sequential nonlinear least-square estimation (SNLSE),
is introduced to identify the model parameters. It is shown that the proposed simplified Bouc-Wen model is capable of describing
the nonlinear hysteretic behavior of RBs, and that the SNLSE approach is very effective in identifying the model parameters
of RBs. |
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Keywords: | parameter identification rubber-bearing hysteretic behavior Bouc-Wen model sequential nonlinear least-square estimation |
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