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dc.contributor.authorFrøseth, Gunnstein Thomas
dc.contributor.authorRønnquist, Anders
dc.contributor.authorCantero, Daniel
dc.contributor.authorØiseth, Ole
dc.date.accessioned2017-05-30T07:29:19Z
dc.date.available2017-05-30T07:29:19Z
dc.date.created2017-05-04T14:54:28Z
dc.date.issued2017
dc.identifier.citationComputers and structures. 2017, 189 21-30.nb_NO
dc.identifier.issn0045-7949
dc.identifier.urihttp://hdl.handle.net/11250/2443773
dc.description.abstractThis paper proposes a new method for extracting static influence lines from measurements on bridges. The response of a structure is the convolution of the load and the influence line. Previous research has not embraced the fact that convolution is very efficiently handled in the frequency domain. The new method is based on the Fourier transform, which reduces the computational complexity of influence line extraction by several orders of magnitude compared to the conventional matrix method. The method can therefore be used to extract influence lines in near real time when implemented in low-powered devices, high-sensor-count systems, under high sampling rates and/or long signal sizes. It is shown that the inverse approach is ill-posed for certain vehicle configurations. A regularization technique for the ill-posed inverse problem is provided by a stabilizing filter. A numerical example is used to validate the regularization technique. The feasibility of the proposed method on real-world applications is demonstrated by a case study. The method is relevant to applications of and research on B-WIM algorithms, damage detection in structural health monitoring applications as well as model validation and model updating in the model-based evaluation of bridges.nb_NO
dc.language.isoengnb_NO
dc.publisherElseviernb_NO
dc.relation.urihttp://www.sciencedirect.com/science/article/pii/S0045794916314146
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/deed.no*
dc.titleInfluence line extraction by deconvolution in the frequency domainnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.source.pagenumber21-30nb_NO
dc.source.volume189nb_NO
dc.source.journalComputers & structuresnb_NO
dc.identifier.doihttp://dx.doi.org/10.1016/j.compstruc.2017.04.014
dc.identifier.cristin1468221
dc.description.localcode© 2017. This manuscript version is made available under the CC-BY-NC-ND 4.0 license.nb_NO
cristin.unitcode194,64,45,0
cristin.unitnameInstitutt for konstruksjonsteknikk
cristin.ispublishedtrue
cristin.fulltextpostprint
cristin.fulltextpreprint
cristin.qualitycode2


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Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal
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