Dynamic behaviour of underspanned suspension road bridges under traffic loads

Oliva Quecedo, Javier and Goicolea Ruigómez, José María and Antolin Sanchez, Pablo and Astiz Suárez, Miguel Angel (2014). Dynamic behaviour of underspanned suspension road bridges under traffic loads. "Journal of the South African Institution of Civil Engineering", v. 56 (n. 3); pp. 77-87. ISSN 1021-2019.

Description

Title: Dynamic behaviour of underspanned suspension road bridges under traffic loads
Author/s:
  • Oliva Quecedo, Javier
  • Goicolea Ruigómez, José María
  • Antolin Sanchez, Pablo
  • Astiz Suárez, Miguel Angel
Item Type: Article
Título de Revista/Publicación: Journal of the South African Institution of Civil Engineering
Date: October 2014
ISSN: 1021-2019
Volume: 56
Subjects:
Freetext Keywords: underspanned suspension bridges, road roughness, vehicle– bridge dynamic interaction, deck vibrations, penalty method
Faculty: E.T.S.I. Caminos, Canales y Puertos (UPM)
Department: Mecánica de Medios Continuos y Teoría de Estructuras
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Underspanned suspension bridges are structures with important economical and aesthetic advantages, due to their high structural efficiency. However, road bridges of this typology are still uncommon because of limited knowledge about this structural system. In particular, there remains some uncertainty over the dynamic behaviour of these bridges, due to their extreme lightness. The vibrations produced by vehicles crossing the viaduct are one of the main concerns. In this work, traffic-induced dynamic effects on this kind of viaduct are addressed by means of vehicle-bridge dynamic interaction models. A finite element method is used for the structure, and multibody dynamic models for the vehicles, while interaction is represented by means of the penalty method. Road roughness is included in this model in such a way that the fact that profiles under left and right tyres are different, but not independent, is taken into account. In addition, free software {PRPgenerator) to generate these profiles is presented in this paper. The structural dynamic sensitivity of underspanned suspension bridges was found to be considerable, as well as the dynamic amplification factors and deck accelerations. It was also found that vehicle speed has a relevant influence on the results. In addition, the impact of bridge deformation on vehicle vibration was addressed, and the effect on the comfort of vehicle users was shown to be negligible.

More information

Item ID: 35938
DC Identifier: http://oa.upm.es/35938/
OAI Identifier: oai:oa.upm.es:35938
Official URL: http://www.scielo.org.za/scielo.php?pid=S1021-20192014000300008&script=sci_arttext
Deposited by: Memoria Investigacion
Deposited on: 03 Jul 2015 09:24
Last Modified: 03 Jul 2015 09:24
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