000021784 001__ 21784
000021784 005__ 20170622131304.0
000021784 04107 $$aeng
000021784 046__ $$k2017-06-15
000021784 100__ $$aStefanidou, Sotiria
000021784 24500 $$aSEISMIC CAPACITY AND DEMAND ASSESSMENT IN BRIDGE-SPECIFIC FRAGILITY ANALYSIS

000021784 24630 $$n6.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000021784 260__ $$bNational Technical University of Athens, 2017
000021784 506__ $$arestricted
000021784 520__ $$2eng$$aDuring the last three decades, a large number of analytical methodologies have been developed for the seismic assessment of bridges and the derivation of bridge fragility curves. However, recently, the research focus has shifted on the derivation of bridge-specific fragility curves, recognizing the effect of different geometry, structural system, component and soil properties, on the seismic assessment results. In this context, a new, component-based methodology for the derivation of bridgespecific fragility curves has been proposed by the authors, with a view to overcoming the inherent difficulties in assessing all bridges of a road network and the drawbacks of existing methodologies, which propose usage of the same group of fragility curves for bridges classified within the same category. Therefore, the main issue addressed in this paper is to analytically determine capacity and demand in bridge-specific fragility analysis in the frame of the methodology previously proposed by the authors, aiming at application to realistically sized bridge stocks. Capacity (resistance) is calculated individually for each critical component with the aid of inelastic pushover analysis, quantifying damage in displacement terms based on the capacity curve and the correlation of global to local damage. Bridge piers, abutments and bearings are considered as the (seismically) critical components of a bridge system; piers of different types and characteristics, and different types of abutments and bearings are analysed and included in a database that provides case-specific limit state thresholds of component capacity. The effect of component parameters on limit state thresholds is therefore assessed, highlighting the differences according to the limit state and component considered. Demand is also calculated for each component using either inelastic response-history or elastic dynamic analysis, depending on the application scale (single bridge vs bridge stock), while uncertainties in both capacity and demand are quantified. Case-specific capacity and demand estimations using the proposed methodology are given here for three bridges having different structural systems, and the derived bridgespecific fragility curves are compared with fragility curves for all bridges classified within the same category, to assess the degree of over- or under- estimation of the probability of damage when generic bridge classes are used.

000021784 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000021784 653__ $$aBridges, Seismic Demand, Fragility Curves, Nonlinear Analysis

000021784 7112_ $$aCOMPDYN 2017 - 6th International Thematic Conference$$cRhodes Island (GR)$$d2017-06-15 / 2017-06-17$$gCOMPDYN2017
000021784 720__ $$aStefanidou, Sotiria$$iKappos, Andreas
000021784 8560_ $$ffischerc@itam.cas.cz
000021784 8564_ $$s2090836$$uhttps://invenio.itam.cas.cz/record/21784/files/17921.pdf$$yOriginal version of the author's contribution as presented on CD, section: [MS06] Seismic assessment of bridges and resilience of transportation networks
.
000021784 962__ $$r21500
000021784 980__ $$aPAPER