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Author(s):	Dutulescu, E.
Title:
Abstract:	Die Nachweise zur Begrenzung der Verformungen von Stahlbetonbauteilen sind infolge der Verwendung von Baustoffen höherer Festigkeiten immer wichtiger geworden, oft sogar maßgebend. Eine Verdopplung der Betondruckfestigkeit eines normalen Betons ruft eine etwa 20%ige Erhöhung des Ec-Moduls hervor aber keine des Betonstahls, da Es konstant ist. Dies und die dementsprechend schlanker gewordenen Stahlbetonbauteile führen zu größeren Verformungen - Verlängerungen, Durchbiegungen und/oder Verdrehungen - die deren Verhalten beeinträchtigen können. Die für die Ermittlung der Verformungen benötigten “Normalkraft-mittlere Dehnungslinien”, bzw. “Moment-mittlere Krümmungslinien” werden erläutert. About the Calculation of Displacements of Reinforced Concrete Members in the Serviceability Limit State The verification of reinforced concrete elements for the purpose of limiting deformations has become increasingly important, often even decisive, as a result of the use of higher strength materials. A doubling of the compressive strength of a normal concrete causes an increase of about 20% in the Ec-module, and none of reinforcing steel, because Es is constant. This and, accordingly, the slender reinforced concrete elements lead to larger deformations - elongations, deflections and/or rotations - which may affect their behaviour. The determination of “axial tensile force - mean strain diagrams”, respectively “bending moment - mean curvature diagrams”, needed for the calculation of the displacements, is explained.
Source:	Beton- und Stahlbetonbau 104 (2009), No. 8
Page/s:	505-516
Language of Publication:	German

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