Extension of semi-analytical approach to determine natural frequencies and mode shapes of multi-span orthotropic bridge deck

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Title: Extension of semi-analytical approach to determine natural frequencies and mode shapes of multi-span orthotropic bridge deck
Authors: Rezaiguia, Abdelouahab
Fisli, Y.
Ellagoune, S.
et al.
Permanent link: http://hdl.handle.net/10197/4874
Date: 10-Jul-2012
Abstract: This paper extends a single equation, semi-analytical approach for three-span bridges to multispan ones for the rapid and precise determination of natural frequencies and natural mode shapes of an orthotropic, multi-span plate. This method can be used to study the dynamic interaction between bridges and vehicles. It is based on the modal superposition method taking into account intermodal coupling to determine natural frequencies and mode shapes of a bridge deck. In this paper, a four- and a five-span orthotropic roadway bridge decks are compared in the first 10 modes with a finite element method analysis using ANSYS software. This simplified implementation matches numerical modeling within 2% in all cases. The paper verifies that applicability of single formula approach as a simpler alternative to finite element modeling.
Type of material: Journal Article
Publisher: Techno-press Ltd
Copyright (published version): 2012 Techno-press
Keywords: natural frequenciesnatural mode shapesmulti-span orthotropic bridge deckdynamic loadingtraffic
Language: en
Status of Item: Peer reviewed
Appears in Collections:Earth Institute Research Collection
Civil Engineering Research Collection

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