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Earthquakes and Structures Volume 13, Number 6, December 2017 , pages 599-611 DOI: https://doi.org/10.12989/eas.2017.13.6.599 |
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Seismic fragility of a typical bridge using extrapolated experimental damage limit states |
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Yang Liu, Fabrizio Paolacci and Da-Gang Lu
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| Abstract | ||
| This paper improves seismic fragility of a typical steel-concrete composite bridge with the deck-to-pier connection joint configuration at the concrete crossbeam (CCB). Based on the quasi-static test on a typical steel-concrete composite bridge model under the SEQBRI project, the damage states for both of the critical components, the CCB and the pier, are identified. The finite element model is developed, and calibrated using the experimental data to model the damage states of the CCB and the bridge pier as observed from the experiment of the test specimen. Then the component fragility curves for both of the CCB and the pier are derived and combined to develop the system fragility curves of the bridge. The uncertainty associated with the mean system fragility has been discussed and quantified. The study reveals that the CCB is more vulnerable than the pier for certain damage states and the typical steel-concrete composite bridge with CCB exhibits desirable seismic performance. | ||
| Key Words | ||
| seismic fragility; steel-concrete composite bridge; quasi-static test; concrete crossbeam; damage state | ||
| Address | ||
| Yang Liu and Da-Gang Lu : School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, P.R. China Fabrizio Paolacci : Department of Engineering, Roma Tre University, Rome, Italy | ||