Stochastic modeling and statistical analysis of fatigue tests on prestressed concrete beams under cyclic loadings

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dc.contributor.authorHeeke, Guido
dc.contributor.authorHermann, Simone
dc.contributor.authorHeinrich, Jens
dc.contributor.authorIckstadt, Katja
dc.contributor.authorMaurer, Reinhard
dc.contributor.authorMüller, Christine H.
dc.date.accessioned2015-07-28T11:19:09Z
dc.date.available2015-07-28T11:19:09Z
dc.date.issued2015
dc.description.abstractTo evaluate the fatigue behavior of prestressed concrete, bridges for instance, it is necessary to determine the built in tendons’ fatigue strength. Therefore, prestressing steel samples (strands), obtained from an existing bridge built in 1957, were examined and tested by TU Dortmund University, see [1, 2]. Additionally, similar prestressing steels were tested in comparable experiments. As large experiments on prestressed concrete beams under cyclic load with small stress range are very time-consuming and expensive, an early prediction of failure trend in the experiment is desirable. Here, it is shown that a crack width function can be evolved dependent on the process of single wire failures. This process will differ for each experiment because of the randomness of single wire failure. Description of this uncertainty is the first step and is achieved by a predictive distribution for the counting process of wire failure. The second step is to include these results into the model for the crack width process for which a nonlinear regression model based on a physically evolved function depending on the counting process is suitable. For both modeling steps, we present a Bayesian estimation and prediction procedure.en
dc.identifier.urihttp://hdl.handle.net/2003/34173
dc.identifier.urihttp://dx.doi.org/10.17877/DE290R-7624
dc.language.isoende
dc.relation.ispartofseriesDiscussion Paper / SFB 823;25/2015en
dc.subjectcrack growthen
dc.subjectBayesian estimation and predictionen
dc.subjectnonlinear regressionen
dc.subjectcounting processen
dc.subjectlong-term testsen
dc.subjectprestressing steelen
dc.subjectfatigue experimentsen
dc.subject.ddc310
dc.subject.ddc330
dc.subject.ddc620
dc.titleStochastic modeling and statistical analysis of fatigue tests on prestressed concrete beams under cyclic loadingsen
dc.typeTextde
dc.type.publicationtypeworkingPaperde
dcterms.accessRightsopen access

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