000013727 001__ 13727
000013727 005__ 20161114170253.0
000013727 04107 $$aeng
000013727 046__ $$k2011-05-25
000013727 100__ $$aGiannelos, Ch.
000013727 24500 $$aSimplified Seismic Performance Assesment Over the Lifetime of a Highway Bridge Subject to Pier Reinforcement Corrosion

000013727 24630 $$n3.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000013727 260__ $$bNational Technical University of Athens, 2011
000013727 506__ $$arestricted
000013727 520__ $$2eng$$aThe lifetime seismic performance of a typical segmental three-span (75+120+75) Egnatia Odos Highway bridge is assessed, considering the corrosive action of chloride ions that leads to pier strength degradation over time. The aim is to show the influence of corrosion on the seismic demand and capacity over the entire design life of the bridge, as well as the usefulness of simplified single-degree-of-freedom (SDOF) models to minimize the computational cost to non-prohibitive levels for contemporary capabilities. Five different time instants are chosen within the 120 year design life of the bridge. For each instant, the piers’ reinforcement steel loss is calculated via a probabilistic model using Monte Carlo simulation to account for the uncertainty in the factors that affect the corrosion. While incremental dynamic analysis (IDA) of the complex model would be the method of choice for a comprehensive evaluation, we employ instead approximate IDA of equivalent SDOF systems with capacity curves derived by static pushover analysis. Such analyses are efficiently executed for different time moments of the design life of the bridge, taking into account the active pier rebar diameter due to corrosion effects. Thus, the usefulness of the equivalent SDOF system concept combined with nonlinear dynamic analysis or a powerful R-μ-Τ relationship such as SPO2IDA is shown. This usefulness turns to a necessity when more factors of epistemic uncertainty beyond the corrosion process are added in this already complex problem, disproportionately magnifying the required computational load.

000013727 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000013727 653__ $$aBridges, Corrosion, Reinforced Concrete, Static Pushover Analysis, Incremental Dynamic Analysis, Equivalent Single-Degree-Of-Freedom Model, Performance-Based Earthquake Engineering.

000013727 7112_ $$aCOMPDYN 2011 - 3rd International Thematic Conference$$cIsland of Corfu (GR)$$d2011-05-25 / 2011-05-28$$gCOMPDYN2011
000013727 720__ $$aGiannelos, Ch.$$iVamvatsikos, D.
000013727 8560_ $$ffischerc@itam.cas.cz
000013727 8564_ $$s3653747$$uhttp://invenio.itam.cas.cz/record/13727/files/578.pdf$$yOriginal version of the author's contribution as presented on CD, section: MS 05 Analysis Methods for the Seismic Design and Assessment of Bridges.
000013727 962__ $$r13401
000013727 980__ $$aPAPER