000015816 001__ 15816
000015816 005__ 20161115135330.0
000015816 04107 $$aeng
000015816 046__ $$k2013-06-12
000015816 100__ $$aPapadopoulos, S.
000015816 24500 $$aAssessment of Ec 8 Procedures for the Asynchronous Excitation of Bridges Based on Numerical Analysis and Recorded Data

000015816 24630 $$n34.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000015816 260__ $$bNational Technical University of Athens, 2013
000015816 506__ $$arestricted
000015816 520__ $$2eng$$aThe significance of the spatial variability of earthquake ground motion SVEGM is recognized by all modern seismic codes (EC8, AASHTO, ATC, JRA) but it is only EC8 that provides a clear, though simplified, methodology to account for asynchronous motion for design purposes. Currently, two amendments of the EC8 methodology have been proposed by Sextos & Kappos (2009) and Nuti & Vanzi (2009) both aiming to improve the applicability and robustness of the EC8 simplified procedure. In the present study, the above EC8 framework is comparatively assessed in the light of actual, low-amplitude measurements obtained along the Evripos cable stayed bridge. A permanent accelerometer special array of 43 sensors was installed on the bridge in 1994 by the Institute of Engineering Seismology and Earthquake Engineering. Since then, the bridge’s behavior to seismic excitations has been continuously monitored. A reliable numerical model was first developed and was updated to match the monitored response given the available free-field recordings. Subsequently, various (synchronous and asynchronous) seismic scenarios were developed to identify the impact of ground motion spatial variation on the action effects of the bridge using the 7/9/1999, Athens earthquake (Ms=5.9) records. The results indicate that spatial variability of earthquake ground motion has generally a favorable effect on the Evripos bridge response, primarily due to the significant flexibility of its deck. It is also concluded that the Eurocode 8 simplified method, being essentially a pseudo-static loading is inable to capture the salient features of dynamic response under multiple-support excitation.

000015816 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000015816 653__ $$aspatial variability of earthquake ground motion, bridges, seismic response, incoherency patterns, system identification, Evripos bridge

000015816 7112_ $$aCOMPDYN 2013 - 4th International Thematic Conference$$cIsland of Kos (GR)$$d2013-06-12 / 2013-06-14$$gCOMPDYN2013
000015816 720__ $$aPapadopoulos, S.$$iLekidis, V.$$iSextos, A.$$iKarakostas, C.
000015816 8560_ $$ffischerc@itam.cas.cz
000015816 8564_ $$s1765592$$uhttps://invenio.itam.cas.cz/record/15816/files/1498.pdf$$yOriginal version of the author's contribution as presented on CD, section: CD-MS 14 SEISMIC ASSESSMENT AND RETROFIT OF BRIDGES
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000015816 962__ $$r15525
000015816 980__ $$aPAPER