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Structural Monitoring and Maintenance Volume 7, Number 4, December 2020 , pages 367-392 DOI: https://doi.org/10.12989/smm.2020.7.4.367 |
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Effects of curvature radius on vulnerability of curved bridges subjected to near and far-field strong ground motions |
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Ali Naseri, Alireza MirzaGoltabar Roshan,
Hossein Pahlavan and Gholamreza Ghodrati Amiri
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| Abstract | ||
| The specific characteristics of near-field earthquake records can lead to different dynamic responses of bridges compared to far-field records. However, the effect of near-field strong ground motion has often been neglected in the seismic performance assessment of the bridges. Furthermore, damage to horizontally curved multi-frame RC box-girder bridges in the past earthquakes has intensified the potential of seismic vulnerability of these structures due to their distinctive dynamic behavior. Based on the nonlinear time history analyses in OpenSEES, this article, assesses the effects of near-field versus far-field earthquakes on the seismic performance of horizontally curved multi-frame RC box-girder bridges by accounting the vertical component of the earthquake records. Analytical seismic fragility curves have been derived thru considering uncertainties in the earthquake records, material and geometric properties of bridges. The findings indicate that near-field effects reasonably increase the seismic vulnerability in this bridge sub-class. The results pave the way for future regional risk assessments regarding the importance of either including or excluding near-field effects on the seismic performance of horizontally curved bridges. | ||
| Key Words | ||
| curvature radius; curved bridges; seismic fragility; near and far-field; probabilistic vulnerability; damage monitoring system | ||
| Address | ||
| Ali Naseri: Structural Engineering, Babol Noshirvani University of Technology, Iran Alireza MirzaGoltabar Roshan: Babol Noshirvani University of Technology, Iran Hossein Pahlavan: Earthquake Engineering, Shahrood University of Technology, Iran Gholamreza Ghodrati Amiri: Center of Excellence for Fundamental Studies in Structural Engineering, Univ. of Science and Technology, School of Civil Engineering, Iran | ||
