2024-03-29T06:41:20Zhttps://repositori.uji.es/oai/requestoai:repositori.uji.es:10234/495352022-12-05T15:23:08Zcom_10234_7035com_10234_9col_10234_8617
00925njm 22002777a 4500
dc
Martínez-Rodrigo, María D.
author
Lavado, J.
author
Museros, P.
author
2010
This paper deals with the application of Passive Control techniques to mitigate the excessive vibrations that short simply supported railway bridges may undergo under the circulation of High-Speed trains. A possible solution to reduce inadmissible levels of deck vertical acceleration, based on retrofitting the bridge with fluid viscous dampers connected to the slab and to an auxiliary structure, is proposed and evaluated. To this end, two real bridges belonging to the Spanish railway network are analysed using an orthotropic plate Finite Element model, which properties are updated from experimental tests performed on the structures in the past. A possible conditioning of the respective lines for higher design velocities than the current ones is considered, leading to inadmissible performances of the bridges. A particular retrofit is proposed for each structure in order to accomplish the Serviceability Limit State of vertical acceleration, and the controlling effect of the proposed system is shown for a wide range of trains and circulating velocities. In order to realistically assess the technical feasibility of the alternative, special attention is given to practical aspects related to the auxiliary structure and dampers installation. © 2009 Elsevier Ltd. All rights reserved.
Engineering Structures, 32, 3, p. 808-828
1410296
http://hdl.handle.net/10234/49535
http://dx.doi.org/10.1016/j.engstruct.2009.12.008
Bridge dynamics
Fluid viscous dampers
Moving loads
Orthotropic plates
Passive control
Railway bridges
Resonance phenomena
Structural retrofit
Dynamic performance of existing high-speed railway bridges under resonant conditions retrofitted with fluid viscous dampers