Influence of the Second Bending Mode on the Response of High-Speed Bridges at Resonance

Museros Romero, Pedro and Alarcón Álvarez, Enrique (2005). Influence of the Second Bending Mode on the Response of High-Speed Bridges at Resonance. "Journal of Structural Engineering", v. 131 (n. 3); pp. 405-415. ISSN 1943-541X. https://doi.org/10.1061/(ASCE)0733-9445(2005)131:3(405).

Description

Title: Influence of the Second Bending Mode on the Response of High-Speed Bridges at Resonance
Author/s:
  • Museros Romero, Pedro
  • Alarcón Álvarez, Enrique
Item Type: Article
Título de Revista/Publicación: Journal of Structural Engineering
Date: March 2005
Volume: 131
Subjects:
Freetext Keywords: Bridges - railroad - Bridge loads - Bridge design - Dynamic loads - Railroad engineering - Repeated loads - Resonance - Oscillations
Faculty: E.T.S.I. Industriales (UPM)
Department: Mecánica Estructural y Construcciones Industriales [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

This paper deals with the assessment of the contribution of the second bending mode to the dynamic behavior of simply supported railway bridges. Traditionally the contributions of modes higher than the fundamental have been considered of little importance for the computation of the magnitudes of interest to structural engineers (vertical deflections, bending moments, etc.). Starting from the dimensionless equations of motion of a simply supported beam subjected to moving loads, the key parameters governing the dynamic behavior are identified. Then, a parametric study over realistic ranges of values of those parameters is conducted, and the influence of the second mode examined in detail. The main purpose is to decide whether the second mode should be taken into account for the determination of the maximum displacement and acceleration in high-speed bridges. In addition, the reasons that cause the contribution of the second bending mode to be relevant in some situations are highlighted, particularly with regard to the computation of the maximum acceleration.

More information

Item ID: 32352
DC Identifier: http://oa.upm.es/32352/
OAI Identifier: oai:oa.upm.es:32352
DOI: 10.1061/(ASCE)0733-9445(2005)131:3(405)
Official URL: http://ascelibrary.org/doi/abs/10.1061/%28ASCE%290733-9445%282005%29131%3A3%28405%29
Deposited by: Biblioteca ETSI Industriales
Deposited on: 16 Oct 2014 06:28
Last Modified: 16 Oct 2014 06:37
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