TY - JOUR
T1 - Finite element model calibration effects on the earthquake response of masonry arch bridges
AU - Sevim, Bar
AU - Bayraktar, Alemdar
AU - Altuniik, Ahmet Can
AU - Atamtürktür, Sezer
AU - Birinci, Fatma
N1 - Funding Information:
This research was supported by the TUBITAK and Karadeniz Technical University under Research Grant nos. 106M038 , 2005.112.001.1 , and 2006.112.001.1 , respectively. Editorial help of Godfrey Kimball of Clemson University is greatly appreciated.
PY - 2011/7
Y1 - 2011/7
N2 - The focus of this paper is to illustrate the importance of model calibration and in situ vibration testing by comparing the finite element model predictions of the earthquake response of the two historical arch bridges, Osmanl and enyuva, before and after model calibration. The three-dimensional finite element models of these two arch bridges, built in the ANSYS finite element program, are used to predict bridge dynamic characteristics, such as natural frequencies and mode shapes. Following the analytical study, ambient vibration tests were conducted to experimentally obtain dynamic characteristics of these two bridges. During ambient vibration tests, accelerometers were placed at several points on the bridge to collect the vibration response due to natural and operational excitation sources. Enhanced frequency domain decomposition and stochastic subspace identification techniques were used to extract the experimental natural frequencies, mode shapes and damping ratios. Finite element models of the two arch bridges were adjusted such that the model predictions reproduce the ambient vibration test results with increased fidelity. The behavior of the masonry arch bridges under earthquake excitation recorded during the Erzincan Earthquake in 1992 is simulated by both the initial and adjusted finite element models. The findings of this study emphasize the importance of model calibration and ambient vibration testing.
AB - The focus of this paper is to illustrate the importance of model calibration and in situ vibration testing by comparing the finite element model predictions of the earthquake response of the two historical arch bridges, Osmanl and enyuva, before and after model calibration. The three-dimensional finite element models of these two arch bridges, built in the ANSYS finite element program, are used to predict bridge dynamic characteristics, such as natural frequencies and mode shapes. Following the analytical study, ambient vibration tests were conducted to experimentally obtain dynamic characteristics of these two bridges. During ambient vibration tests, accelerometers were placed at several points on the bridge to collect the vibration response due to natural and operational excitation sources. Enhanced frequency domain decomposition and stochastic subspace identification techniques were used to extract the experimental natural frequencies, mode shapes and damping ratios. Finite element models of the two arch bridges were adjusted such that the model predictions reproduce the ambient vibration test results with increased fidelity. The behavior of the masonry arch bridges under earthquake excitation recorded during the Erzincan Earthquake in 1992 is simulated by both the initial and adjusted finite element models. The findings of this study emphasize the importance of model calibration and ambient vibration testing.
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U2 - 10.1016/j.finel.2010.12.011
DO - 10.1016/j.finel.2010.12.011
M3 - Article
AN - SCOPUS:79955474791
SN - 0168-874X
VL - 47
SP - 621
EP - 634
JO - Finite Elements in Analysis and Design
JF - Finite Elements in Analysis and Design
IS - 7
ER -