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Author(s):	Wagner, Juliane; Spelter, Arne; Hegger, Josef; Curbach, Manfred
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Abstract:	Seit einigen Jahren werden vermehrt Brücken aus und mit Carbonbeton gebaut und verstärkt. Somit gewinnt dessen Zugtragverhalten unter Ermüdungsbelastung immer mehr an Relevanz. Systematische Untersuchungen hierzu liegen bislang nicht vor. Nachfolgend werden Ermüdungsuntersuchungen an zwei unterschiedlichen Materialkombinationen mit epoxid- bzw. polyachrylatgetränkten Carbontextilien in Dehnkörperversuchen vorgestellt. Diese wurden unter Zugschwellbelastung an den Instituten für Massivbau der RWTH Aachen und der TU Dresden getestet. Mithilfe der Versuchsergebnisse konnten für beide Carbonbewehrungen Spannungs-Schwingspiel(S-N)-Kurven erstellt und Aussagen zur Dauerschwingfestigkeit getroffen werden. Auch wenn sich beide Materialkombinationen sehr unterschiedlich verhalten, können die erzielten Ergebnisse durchaus positiv bewertet werden. Fatigue behavior of carbon reinforced concrete under repeated tensile stress During the last years, the number of bridges built out of or strengthened by carbon reinforced concrete increased. Therefore, its behavior under fatigue tensile loading gained in importance. However, corresponding systematical investigations are missing. In this paper, fatigue investigations on two different material combinations with epoxy resp. polyachrylate impregnated carbon textiles examined in tensile tests are presented. The investigations under repeated tensile stress took place at the Institute of Structural Concrete of RWTH Aachen University and the Institute of Concrete Structures of TU Dresden. On the basis of the test results S-N-curves could be determined and the fatigue strengths could be evaluated. Although both textile reinforcements show a quite different material behavior, the results are pleasing.
Source:	Beton- und Stahlbetonbau 115 (2020), No. 9
Page/s:	710-719
Language of Publication:	German

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