000013193 001__ 13193
000013193 005__ 20161114160331.0
000013193 04107 $$aeng
000013193 046__ $$k2009-06-22
000013193 100__ $$aMoliner, E.
000013193 24500 $$aVibration control of high-speed railway bridges using non linear viscoelastic dampers

000013193 24630 $$n2.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000013193 260__ $$bNational Technical University of Athens, 2009
000013193 506__ $$arestricted
000013193 520__ $$2eng$$aIn the present study the energy-absorbing capacities of viscoelastic dampers (VEDs) applied to the retrofit of high-speed railway bridges are investigated. The behavior of the damping material is simulated using a non-linear fractional derivative model, previously developed by Tsai and Lee, and in good agreement with experimental tests. As for the railway bridge, it is modelled as a simply supported beam with Euler-Bernoulli behaviour. A set of discrete VEDs connect the bridge deck with an auxiliary Euler-Bernoulli beam, which transforms the deck vertical oscillations into dampers relative movement. As an example, a simply supported railway bridge with inadmissible vertical accelerations is retrofitted with viscoelastic dampers. Numerical results show that the dynamic response of the structure with added VEDs is significantly reduced in resonance, compared to the response of the system without dampers.

000013193 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000013193 653__ $$aHigh-speed railway bridges, retrofit of bridges, ballast instability, moving loads, resonance phenomena, viscoelastic dampers Abstract. In the present study the energy-absorbing capacities of viscoelastic dampers (VEDs) applied to the retrofit of high-speed railway bridges are investigated. The behavior of the damping material is simulated using a non-linear fractional derivative model, previously developed by Tsai and Lee, and in good agreement with experimental tests. As for the railway bridge, it is modelled as a simply supported beam with Euler-Bernoulli behaviour. A set of discrete VEDs connect the bridge deck with an auxiliary Euler-Bernoulli beam, which transforms the deck vertical oscillations into dampers relative movement. As an example, a simply supported railway bridge with inadmissible vertical accelerations is retrofitted with viscoelastic dampers. Numerical results show that the dynamic response of the structure with added VEDs is significantly reduced in resonance, compared to the response of the system without dampers.

000013193 7112_ $$aCOMPDYN 2009 - 2nd International Thematic Conference$$cIsland of Rhodes (GR)$$d2009-06-22 / 2009-06-24$$gCOMPDYN2009
000013193 720__ $$aMoliner, E.$$iMuseros, P.$$iNasarre, J.
000013193 8560_ $$ffischerc@itam.cas.cz
000013193 8564_ $$s728025$$uhttps://invenio.itam.cas.cz/record/13193/files/CD259.pdf$$yOriginal version of the author's contribution as presented on CD, section: Dynamic effects on high-speed railway tracks - i (MS).
000013193 962__ $$r13074
000013193 980__ $$aPAPER