Simplified seismic performance assesment over the lifetime of a highway bridge subject to pier reinforcement corrosion

Giannelos, C; Vamvatsikos, D

dc.contributor.author	Giannelos, C	en
dc.contributor.author	Vamvatsikos, D	en
dc.date.accessioned	2014-03-01T02:53:28Z
dc.date.available	2014-03-01T02:53:28Z
dc.date.issued	2011	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/36343
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-80054795611&partnerID=40&md5=bdc95f80a0d0ee62a36edbc6ed4c22c8	en
dc.subject	Bridges	en
dc.subject	Corrosion	en
dc.subject	Equivalent single-degree-of-freedom model	en
dc.subject	Incremental dynamic analysis	en
dc.subject	Performance-based earth-quake engineering	en
dc.subject	Reinforced concrete	en
dc.subject	Static pushover analysis	en
dc.subject.other	Assesment	en
dc.subject.other	Capacity curves	en
dc.subject.other	Chloride ions	en
dc.subject.other	Complex model	en
dc.subject.other	Complex problems	en
dc.subject.other	Comprehensive evaluation	en
dc.subject.other	Computational costs	en
dc.subject.other	Computational loads	en
dc.subject.other	Corrosion effects	en
dc.subject.other	Corrosion process	en
dc.subject.other	Design life	en
dc.subject.other	Epistemic uncertainties	en
dc.subject.other	Incremental dynamic analysis	en
dc.subject.other	Monte Carlo Simulation	en
dc.subject.other	Non-linear dynamic analysis	en
dc.subject.other	Performance-based earth-quake engineering	en
dc.subject.other	Probabilistic models	en
dc.subject.other	Reinforcement corrosion	en
dc.subject.other	Reinforcement steels	en
dc.subject.other	SDOF system	en
dc.subject.other	Seismic demand and capacity	en
dc.subject.other	Seismic Performance	en
dc.subject.other	Single-degree-of-freedom	en
dc.subject.other	Static pushover analysis	en
dc.subject.other	Strength degradation	en
dc.subject.other	Time moments	en
dc.subject.other	Bridges	en
dc.subject.other	Chlorine compounds	en
dc.subject.other	Civil engineering	en
dc.subject.other	Computational methods	en
dc.subject.other	Computer simulation	en
dc.subject.other	Corrosion	en
dc.subject.other	Design	en
dc.subject.other	Dynamic analysis	en
dc.subject.other	Earthquakes	en
dc.subject.other	Engineering geology	en
dc.subject.other	Highway bridges	en
dc.subject.other	Monte Carlo methods	en
dc.subject.other	Piers	en
dc.subject.other	Reinforced concrete	en
dc.subject.other	Reinforcement	en
dc.subject.other	Seismic waves	en
dc.subject.other	Structural dynamics	en
dc.subject.other	Uncertainty analysis	en
dc.subject.other	Seismic design	en
dc.title	Simplified seismic performance assesment over the lifetime of a highway bridge subject to pier reinforcement corrosion	en
heal.type	conferenceItem	en
heal.publicationDate	2011	en
heal.abstract	The 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 re-bar diameter due to corrosion effects. Thus, the usefulness of the equivalent SDOF system concept combined with nonlinear dynamic analysis or a powerful R-μ-T 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.	en
heal.journalName	ECCOMAS Thematic Conference - COMPDYN 2011: 3rd International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering: An IACM Special Interest Conference, Programme	en