Otárola, K;
Fayaz, J;
Galasso, C;
(2022)
Fragility Analysis of Deteriorating Bridge Components Subjected to Simulated Ground-Motion Sequences.
In:
Proceedings of the 12th National Conference in Earthquake Engineering.
Earthquake Engineering Research Institute: Salt Lake City, UT, USA.
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Abstract
This study assesses the impact of corrosion deterioration on the seismic performance of bridge components during a sequence of ground motions. Specifically, a simplified methodology is proposed to derive state-dependent fragility relationships for bridge components (i.e., relationships that explicitly depend on the damage state achieved by the component during a first shock) subjected to chloride-induced corrosion deterioration and simulated ground-motion sequences. Specifically, vector-valued probabilistic seismic demand models are derived for various corrosion levels. Those models relate the dissipated hysteretic energy in the sequence to a deformation-based engineering demand parameter induced by the first shock and a ground-motion intensity measure of the second shock, calibrated via sequential cloud-based time-history analyses. For each corrosion level, fragility relationships are first derived for a single ground motion; state-dependent fragility relationships are then derived by considering the additional damage induced by a second ground motion within the simulated sequence (structure-specific damage states are considered). Finally, continuous functional models are developed from the analysis results to assemble fragility relationships at a given corrosion level. The results demonstrate the significant impact of environmental deterioration in seismic-prone regions, emphasising the necessity of accounting for deteriorating effects in current practice.
| Type: | Proceedings paper |
|---|---|
| Title: | Fragility Analysis of Deteriorating Bridge Components Subjected to Simulated Ground-Motion Sequences |
| Event: | 12th National Conference on Earthquake Engineering, NCEE 2022 |
| Open access status: | An open access version is available from UCL Discovery |
| Publisher version: | https://12ncee.org/program/proceedings |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Civil, Environ and Geomatic Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10161610 |
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