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Author(s):	Heidolf, T.
Title:
Abstract:	Im vorliegenden Beitrag werden experimentelle Untersuchungen an polymermodifiziertem Beton unter mehrfach wiederholter Druck- und Zugbeanspruchung vorgestellt und mit den Ergebnissen ähnlicher Versuche an Normalbeton und hochfestem Beton verglichen. Besondere Aufmerksamkeit wird dabei dem Formänderungsverhalten und der Steifigkeitsdegradation sowie dem Kriechverhalten und der Mitwirkung des Betons zwischen den Rissen gewidmet. Die signifikante Steifigkeitsdegradation sowie das nichtlineare Langzeitverhalten des Betons zeigen, dass bei der Analyse der Kriechauswirkungen des polymermodifizierten Betons auf das Tragverhalten entsprechender Konstruktionen neben den Gebrauchslasten auch die während der Lastgeschichte aufgetretenen maximalen Beanspruchungssituationen sowie die damit verbundenen Strukturveränderungen zu berücksichtigen sind. Time-variant Behaviour of Polymer Modified Concrete (PCC) under Repeated Stress with Consideration of Damage. Part 1: Experimental Studies The experimental results of the investigations into polymer-modified concrete with continuously repeated compression or tension load are introduced in the provided work and compared to similar experiments on normal- and high-strength concrete. Special attention is dedicated to the stress-strain relation and the degradation of stiffness as well as the non-linear long-term behaviour and tension-stiffening. Stiffness degradation and nonlinear creep of polymer-modified concrete show that maximum strain situations have to be taken into consideration of the behaviour analysis of concrete structures under long-term loading.
Source:	Beton- und Stahlbetonbau 104 (2009), No. 11
Page/s:	706-716
Language of Publication:	German

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