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Estimation of nonlinearities from pseudodynamic and dynamic responses of bridge structures using the Delay Vector Variance method
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Structural Engineering and Bridges.ORCID iD: 0000-0002-5447-2068
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2016 (English)In: Physica A: Statistical Mechanics and its Applications, ISSN 0378-4371, E-ISSN 1873-2119, Vol. 441, 100-120 p., 16342Article in journal (Refereed) Published
Abstract [en]

Analysis of the variability in the responses of large structural systems and quantification of their linearity or nonlinearity as a potential non-invasive means of structural system assessment from output-only condition remains a challenging problem. In this study, the Delay Vector Variance (DVV) method is used for full scale testing of both pseudo-dynamic and dynamic responses of two bridges, in order to study the degree of nonlinearity of their measured response signals. The DVV detects the presence of determinism and nonlinearity in a time series and is based upon the examination of local predictability of a signal. The pseudo-dynamic data is obtained from a concrete bridge during repair while the dynamic data is obtained from a steel railway bridge traversed by a train. We show that DVV is promising as a marker in establishing the degree to which a change in the signal nonlinearity reflects the change in the real behaviour of a structure. It is also useful in establishing the sensitivity of instruments or sensors deployed to monitor such changes.

Place, publisher, year, edition, pages
Elsevier, 2016. Vol. 441, 100-120 p., 16342
Keyword [en]
Bridge, Condition monitoring, Delay Vector Variance (DVV), Instrumentation, Signal nonlinearity, System identification, Bridges, Identification (control systems), Bridge structures, Degree of non-linearity, Delay vector variances, Full-scale testing, Pseudo-dynamics, Steel railway bridge, Structural systems, Dynamic response
National Category
Physical Sciences
URN: urn:nbn:se:kth:diva-177739DOI: 10.1016/j.physa.2015.08.026ScopusID: 2-s2.0-84941928815OAI: diva2:875163

QC 20151130

Available from: 2015-11-30 Created: 2015-11-25 Last updated: 2015-11-30Bibliographically approved

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Karoumi, Raid
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Structural Engineering and Bridges
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