Nonlinear FE model updating of seismic isolated bridge instrumented during the 2010 Mw 8.8 Maule-Chile Earthquake

Yong Li, Rodrigo Astroza, Joel P. Conte, Pedro Soto

Research output: Contribution to journalConference articlepeer-review

2 Scopus citations

Abstract

In this paper, nonlinear finite element model updating (FEMU) is performed to study the prediction accuracy of a state-of-the-art finite element (FE) model of a seismic isolated bridge (SIB). The seismic isolator model parameters are updated in two phases: using component-wise and system-wise FEMU. The isolator model parameter values estimated from 23 isolator component tests show a large scatter, and a poor goodness-of-fit (GOF) of the bridge response to the 2010 Maule Earthquake is obtained when most of those parameter sets are used for the isolator elements of the bridge FE model. In contrast, good agreement between the FE predicted and measured bridge response is obtained when the isolator model parameters are calibrated using the bridge response data recorded during the 2010 Mw 8.8 Maule, Chile Earthquake. The updated FE model is then used to reconstruct response quantities not recorded to gain more insight into the effects of seismic isolation during a strong earthquake.

Original languageEnglish
Pages (from-to)3003-3008
Number of pages6
JournalProcedia Engineering
Volume199
DOIs
StatePublished - 2017
Event10th International Conference on Structural Dynamics, EURODYN 2017 - Rome, Italy
Duration: 10 Sep 201713 Sep 2017

Bibliographical note

Funding Information:
Partial support of this research by (1) the Pacific Earthquake Engineering Research Center under Award No. 1107-NCTRCJ, and (2) the UCSD Academic Senate under Research Grant RN091G-CONTE is gratefully acknowledged. The authors thank Professor Maria O. Moroni and Professor Mauricio Sarrazin from the Department of Civil Engineering at the University of Chile for providing access to the data used in this study.

Publisher Copyright:
© 2017 The Authors. Published by Elsevier Ltd.

Keywords

  • 2010 Maule-Chile Megathrust Earthquake
  • Bridge
  • Nonlinear finite element model updating
  • Optimization
  • Parameter Estimation
  • Seismic isolation

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