000013213 001__ 13213
000013213 005__ 20161114160332.0
000013213 04107 $$aeng
000013213 046__ $$k2009-06-22
000013213 100__ $$aPerros, K.
000013213 24500 $$aReliability analysis of bridge models with elastomeric bearings and seismic stoppers under stochastic earthquake excitations

000013213 24630 $$n2.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000013213 260__ $$bNational Technical University of Athens, 2009
000013213 506__ $$arestricted
000013213 520__ $$2eng$$aThis work investigates the dynamics and reliability of bridge systems with decks supported on columns through elastomeric bearings, while seismic stoppers are used to restrain the motion of the deck during moderate to strong earthquakes. The dynamics of these systems during earthquake shaking can be simulated using models with piecewise linear elastic stiffness elements arising from the motion restrains between the deck and the columns due to the seismic stoppers. These bridge systems also involve strong inelastic behavior due to yielding of the columns under strong earthquakes. In order to gain useful insight into the behavior of these systems, one degree of freedom systems with piecewise linear elastic stiffness characteristics are first analyzed and their behavior to earthquake-like excitations is investigated. The analysis is then extended to nonlinear systems with combined elements having piecewise linear elastic stiffness and inelastic force displacement behavior. Stochastic earthquake excitation models are considered that simulate the strong pulse characteristics of near fault ground motions. The analysis is concentrated on probabilistic response spectra characteristics and the estimation of the sensitivity of these spectra to the values of system and loading parameters, such as initial modal frequency, size of gaps, excitation strength, duration and dominant frequency. The subset simulation method is used to efficiently estimate the probabilistic response spectra. In particular, the sensitivity of the probabilistic response spectra to the size of gaps between decks and seismic stoppers, affecting the behavior of the bridge, is explored and the performance of the bridge system is evaluated.

000013213 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000013213 653__ $$aReliability, Bridges, Seismic Stoppers, Piecewise Linear Systems, Probabilistic Spectra. Abstract. This work investigates the dynamics and reliability of bridge systems with decks supported on columns through elastomeric bearings, while seismic stoppers are used to restrain the motion of the deck during moderate to strong earthquakes. The dynamics of these systems during earthquake shaking can be simulated using models with piecewise linear elastic stiffness elements arising from the motion restrains between the deck and the columns due to the seismic stoppers. These bridge systems also involve strong inelastic behavior due to yielding of the columns under strong earthquakes. In order to gain useful insight into the behavior of these systems, one degree of freedom systems with piecewise linear elastic stiffness characteristics are first analyzed and their behavior to earthquake-like excitations is investigated. The analysis is then extended to nonlinear systems with combined elements having piecewise linear elastic stiffness and inelastic force displacement behavior. Stochastic earthquake excitation models are considered that simulate the strong pulse characteristics of near fault ground motions. The analysis is concentrated on probabilistic response spectra characteristics and the estimation of the sensitivity of these spectra to the values of system and loading parameters, such as initial modal frequency, size of gaps, excitation strength, duration and dominant frequency. The subset simulation method is used to efficiently estimate the probabilistic response spectra. In particular, the sensitivity of the probabilistic response spectra to the size of gaps between decks and seismic stoppers, affecting the behavior of the bridge, is explored and the performance of the bridge system is evaluated.

000013213 7112_ $$aCOMPDYN 2009 - 2nd International Thematic Conference$$cIsland of Rhodes (GR)$$d2009-06-22 / 2009-06-24$$gCOMPDYN2009
000013213 720__ $$aPerros, K.$$iPapadimitriou, C.
000013213 8560_ $$ffischerc@itam.cas.cz
000013213 8564_ $$s457817$$uhttps://invenio.itam.cas.cz/record/13213/files/CD294.pdf$$yOriginal version of the author's contribution as presented on CD, section: Statistical and probabilistic methods in computational mechanics to treat aleatory and epistemic uncertainties in structural and/or geotechnical systems and their loading environment - ii (MS).
000013213 962__ $$r13074
000013213 980__ $$aPAPER