000013616 001__ 13616
000013616 005__ 20161114165848.0
000013616 04107 $$aeng
000013616 046__ $$k2011-05-25
000013616 100__ $$aAlessandri, S.
000013616 24500 $$aA New Method for Probabilistic Aftershock Risk Evaluation of Damaged Bridge

000013616 24630 $$n3.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000013616 260__ $$bNational Technical University of Athens, 2011
000013616 506__ $$arestricted
000013616 520__ $$2eng$$aA critical issue in the emergency management after the earthquake is the functionality of the main infrastructure (hospitals, road network, etc.) and the decision on their usability just after the main shock. At present, a decision is taken on the basis of a structure insitu inspection; an analytical assessment is in contrast with the lack of time and data. For this reason in this paper a method that rationally combines information from the analytical approach and the in situ inspection is proposed. In particular an effective tool to speed-up the decision making phase concerning the evaluation of the seismic risk of mainshock-damaged structures due to aftershocks has been proposed. The risk is calculated combining the aftershock hazard using the Omori law and the fragility curves of the structure calculated using IDA technique and updated using in-situ inspection data. The procedure has been applied to a highway r.c. bridge. The results have highlighted a high sensitivity to the Bayesian updating especially when the damage predicted by the numerical analysis does not correspond to the real damage. The mean annual rates of collapse provided by the method has shown that the risk structure change dramatically when an aftershock sequence strike the bridge and this risk decreases with time allowing the authorities to decide if and when re-open the bridge to traffic.

000013616 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000013616 653__ $$aTime-varying risk, aftershock hazard, fragility curves, damaged structure, bridges.

000013616 7112_ $$aCOMPDYN 2011 - 3rd International Thematic Conference$$cIsland of Corfu (GR)$$d2011-05-25 / 2011-05-28$$gCOMPDYN2011
000013616 720__ $$aAlessandri, S.$$iGiannini, R.$$iPaolacci, F.
000013616 8560_ $$ffischerc@itam.cas.cz
000013616 8564_ $$s745677$$uhttps://invenio.itam.cas.cz/record/13616/files/380.pdf$$yOriginal version of the author's contribution as presented on CD, section: MS 22 Resilience Assessment of Communities and Infrastructures.
000013616 962__ $$r13401
000013616 980__ $$aPAPER