000013491 001__ 13491
000013491 005__ 20161114165556.0
000013491 04107 $$aeng
000013491 046__ $$k2011-05-25
000013491 100__ $$aLavado, J.
000013491 24500 $$aDynamic Performance of Existing High-Speed Railway Bridges Under Resonant Conditions, Retrofitted with Fluid-Viscous Dampers Supported on Clamped Auxiliary Beams

000013491 24630 $$n3.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000013491 260__ $$bNational Technical University of Athens, 2011
000013491 506__ $$arestricted
000013491 520__ $$2eng$$aIn this contribution the application of Passive Control techniques is applied to reduce the severe transverse vibrations that railway bridges of moderate lengths may experiment under resonance conditions. The proposed solution consists on connecting the slab to a series of auxiliary beams with partially restrained rotational end conditions through a set of fluid-viscous dampers. A particular configuration minimizing the space occupied under the bridge deck by the devices and the auxiliary beams is proposed for slabs and girder bridges, typical typologies in the aforementioned range of lengths. First, the dynamic response of the double-beam system at resonance is obtained in closed-form under harmonic excitation in order to detect the main governing parameters of the bridge response. Then conditions for the optimal dampers constants and minimum beam sizes that minimize the bridge dynamic amplification at resonance are obtained using a planar analytical model. Finally the effectiveness of the solution and the adequacy of the expressions derived from the harmonic case are proven under railway traffic excitation. Special attention is given to the beneficial effect of partially restraining the auxiliary beam supports throughout the study.

000013491 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000013491 653__ $$aResonance in Railway Bridges, Passive Control of Structures, Double-beam System, Moving Loads, Dynamics of Bridges, Fluid-viscous Dampers.

000013491 7112_ $$aCOMPDYN 2011 - 3rd International Thematic Conference$$cIsland of Corfu (GR)$$d2011-05-25 / 2011-05-28$$gCOMPDYN2011
000013491 720__ $$aLavado, J.$$iMartinez-Rodrigo, M.D.$$iMuseros, P.
000013491 8560_ $$ffischerc@itam.cas.cz
000013491 8564_ $$s855988$$uhttps://invenio.itam.cas.cz/record/13491/files/189.pdf$$yOriginal version of the author's contribution as presented on CD, section: MS 09 Dynamic Effects On High-Speed Railway Tracks.
000013491 962__ $$r13401
000013491 980__ $$aPAPER