Instantaneous identification of Bouc-Wen-type hysteretic systems from seismic response data

TL;DR

This paper introduces a method to instantly identify Bouc-Wen hysteretic system parameters from seismic data using time-varying spectral analysis, aiding real-time earthquake response assessment.

Contribution

It proposes a novel instantaneous identification technique for Bouc-Wen hysteretic systems based on spectral analysis of seismic responses.

Findings

Successfully applied to earthquake engineering data

Accurate real-time parameter estimation demonstrated

Potential for improved seismic response monitoring

Abstract

This paper presents a technique for identification of non-linear hysteretic systems subjected to non-stationary loading. In the numerical simulations, a Bouc-Wen model was chosen for its ability to represent the properties of a wide class of real hysteretic systems. The parameters of the model are computed instantaneously by approximating the internal restoring force surface through an "ad hoc" polynomial basis. Instantaneous estimates result from time-varying spectra of the response signals. A numerical application of interest to earthquake engineering is finally reported.