TY - JOUR
T1 - Nonlinear FE model updating of seismic isolated bridge instrumented during the 2010 Mw 8.8 Maule-Chile Earthquake.
AU - Li, Yong
AU - Astroza, Rodrigo
AU - Conte, Joel P.
AU - Soto, Pedro
N1 - 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.
PY - 2017
Y1 - 2017
N2 - 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.
AB - 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.
KW - 2010 Maule-Chile Megathrust Earthquake
KW - Bridge
KW - Nonlinear finite element model updating
KW - Optimization
KW - Parameter Estimation
KW - Seismic isolation
UR - http://www.scopus.com/inward/record.url?scp=85029904177&partnerID=8YFLogxK
U2 - 10.1016/j.proeng.2017.09.397
DO - 10.1016/j.proeng.2017.09.397
M3 - Conference article
AN - SCOPUS:85029904177
SN - 1877-7058
VL - 199
SP - 3003
EP - 3008
JO - Procedia Engineering
JF - Procedia Engineering
T2 - 10th International Conference on Structural Dynamics, EURODYN 2017
Y2 - 10 September 2017 through 13 September 2017
ER -