TY - JOUR
T1 - Seismic Performance Assessment of Quasi-Isolated Highway Bridges with Seat-Type Abutments
AU - Luo, Jie
AU - Fahnestock, Larry Alan
AU - LaFave, James Michael
N1 - Funding Information:
This paper is based on the results of ICT R27-070 and ICT R27-133, Calibration and Refinement of Illinois Earthquake Resisting System Bridge Design Methodology: Phases I & II. ICT R27-070 and R27-133 were conducted in cooperation with the Illinois Center for Transportation (ICT); IDOT, Division of Highways; and the U.S. Department of Transportation, Federal Highway Administration (FHWA). The contents do not necessarily reflect the official views or policies of the ICT, IDOT, or FHWA. The authors would like to thank the members of the project Technical Review Panel and graduate research assistants, Evgueni T. Filipov, Joshua S. Steelman, Jessica R. Revell, and Derek L. Kozak, for their valuable advice for this research. The computation allocation at Texas Advanced Computing Center was used to compute the results presented in the paper.
Publisher Copyright:
© 2019 Taylor & Francis Group, LLC.
PY - 2021
Y1 - 2021
N2 - In recent years, Illinois bridge engineers developed an innovative “quasi-isolation” seismic bridge design methodology. The objectives of this study are to assess the seismic performance of prototype quasi-isolated highway bridges, to validate the design strategy, and to provide recommendations for improving bridge seismic performance. A matrix of bridges was computationally studied. Seismic assessment results validate that the current quasi-isolation design strategy is generally effective in preventing global collapse, but the response of a small number of bridges demonstrated a relatively high risk of bearing unseating and severe pier damage. Recommendations for calibrating the current design strategy have therefore been proposed.
AB - In recent years, Illinois bridge engineers developed an innovative “quasi-isolation” seismic bridge design methodology. The objectives of this study are to assess the seismic performance of prototype quasi-isolated highway bridges, to validate the design strategy, and to provide recommendations for improving bridge seismic performance. A matrix of bridges was computationally studied. Seismic assessment results validate that the current quasi-isolation design strategy is generally effective in preventing global collapse, but the response of a small number of bridges demonstrated a relatively high risk of bearing unseating and severe pier damage. Recommendations for calibrating the current design strategy have therefore been proposed.
KW - Base isolation highway bridge response
KW - history analysis bearing unseating seismic damage
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U2 - 10.1080/13632469.2019.1628125
DO - 10.1080/13632469.2019.1628125
M3 - Article
AN - SCOPUS:85068534659
VL - 25
SP - 2285
EP - 2324
JO - Journal of Earthquake Engineering
JF - Journal of Earthquake Engineering
SN - 1363-2469
IS - 11
ER -