000015771 001__ 15771
000015771 005__ 20161115135329.0
000015771 04107 $$aeng
000015771 046__ $$k2013-06-12
000015771 100__ $$aDimitrakopoulos, E.
000015771 24500 $$aNon-Smooth Analysis of the Earthquake-Induced Pounding in Skew Bridges

000015771 24630 $$n34.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000015771 260__ $$bNational Technical University of Athens, 2013
000015771 506__ $$arestricted
000015771 520__ $$2eng$$aSkew bridges with separation/expansion joints are one of the most common types of existing bridges worldwide. Earthquake reconnaissance reports indicate that skew bridges often rotate in the horizontal plane, increasing the chances of unseating at their acute corners. This behaviour is triggered by the oblique, in-deck, contact which leads in coupling of the longitudinal and the transverse response, binding in one of the obtuse corners and subsequently rotation in the horizontal plane, in such a way that the skew angle increases. Despite the recorded evidence from previous earthquakes, and most empirical vulnerability methodologies, which acknowledge skew as a primary vulnerability factor of bridges, the relevant literature lacks a thorough theoretical study and is mostly confined to empirical descriptions of the phenomenon. This study examines both the case of deck-abutment impact, as well as, the impact between adjacent deck segments, of skew bridges. It shows that the coupling, and hence the unseating during an earthquake excitation, after deck-abutment collisions is not a factor of the skew angle alone, but rather of the total geometry in plan plus the contact parameters. Finally, it offers closed-form solutions for all physically feasible post-impact states observed in skew bridges.

000015771 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000015771 653__ $$askew bridges, oblique impact, unilateral contact, concrete bridges, linear complementarity problem, nonsmooth dynamics.

000015771 7112_ $$aCOMPDYN 2013 - 4th International Thematic Conference$$cIsland of Kos (GR)$$d2013-06-12 / 2013-06-14$$gCOMPDYN2013
000015771 720__ $$aDimitrakopoulos, E.
000015771 8560_ $$ffischerc@itam.cas.cz
000015771 8564_ $$s978791$$uhttps://invenio.itam.cas.cz/record/15771/files/1425.pdf$$yOriginal version of the author's contribution as presented on CD, section: CD-MS 02 COMPUTATIONAL CONTACT MECHANICS - SEISMIC INTERACTION (POUNDING) BETWEEN ADJACENT STRUCTURES
.
000015771 962__ $$r15525
000015771 980__ $$aPAPER