Influence of the subestructure irregularity in highway bridge seismic behaviour
Tipus de documentComunicació de congrés
Data publicació2008
Condicions d'accésAccés obert
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Reconeixement-NoComercial-SenseObraDerivada 3.0 Espanya
Abstract
Most of preliminary evaluation methods to accomplish the seismic vulnerability of bridges consider as an evaluation
parameter the substructure irregularity. This parameter is estimated by means of the difference in the length of piers or
through the pier typology, but both evaluated by a subjective form. In this paper the evaluation of the influence of
substructure irregularity is presented. First, a simple and regular bridge, with three piers of equal length and four spans,
is considered as an original structure. Starting from this system, different irregular models were elaborated reducing or
incrementing the length of the central or one of the external piers, in percentages of 25%, 50% and 75%. As a seismic
action, a database of more than 50 earthquakes, registered in the Mexican Pacific Coast, the most seismic hazardous
zone of México, were considered. The selected registers have magnitudes greater than six and important peak ground
accelerations. By means of elastic analyses, the variation between regular and irregular maximum responses in
displacements and internal forces are determined. Of the obtained responses, statistical values as mean and standard
deviation are evaluated. With these values, percentages of difference in the response of irregular bridges were
estimated; these percentages could be included as fragility weights of the irregularity degree in more rigorous
preliminary methods to evaluate the seismic vulnerability of bridges.
CitacióGómez-Soberón, C.; Gómez, J.; Alonso, J. Influence of the subestructure irregularity in highway bridge seismic behaviour. A: World Conference on Earthquake Engineering. "14th World Conference on Earthquake Engineering". Beijing: 2008, p. 1-8.
Versió de l'editorhttp://www.14wcee.org/Proceedings/isv7/main.htm
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05-02-0068 C. G ... Alonso and J. M. Gómez.pdf | Influence of the subestructure irregularity in highway bridge seismic behaviour | 247,6Kb | Visualitza/Obre |