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Author(s):	Schweighofer, Anton; Vill, Markus; Kollegger, Johann
Title:
Abstract:	Im Zuge des Bauvorhabens Hauptbahnhof Wien konnten Untersuchungen an 50 Jahre alten Spannbetonbrückenträgern durchgeführt werden. Die Untersuchungen gliederten sich in zwei Teilbereiche. Der erste Bereich umfasste Großversuche zur Beurteilung des Schubtragverhaltens. Diese wurden in [1] ausführlich beschrieben. Vergleichbare Untersuchungen sind unter anderem in [2] zu finden. Der vorliegende Beitrag stellt den zweiten Teil der Untersuchungen dar und befasst sich mit der Ermittlung der vorhandenen Vorspannkraft nach einer Nutzungsdauer von 50 Jahren. Des Weiteren wird ein Vergleich zu den rechnerisch ermittelten Spannkraftverlusten nach EC2 sowie der Einfluss der unterschiedlichen Randbedingungen auf die Ergebnisse gezeigt. Remaining prestressing force of 50 year old bridge girders and prestressing losses according to EC2 In the course of the construction project Central Railway Station Vienna a research project on 50 year old prestressed bridge girders was carried out. The research project was subdivided into two parts. The first part included ultimate shear load tests of the girders. These tests were described in [1], comparable tests see [2]. This article describes the second part of the analysis and deals with the measurements of the remaining prestressing forces after a service life of 50 years. Furthermore, a comparison of the measured prestressing losses with the calculated prestressing losses according to EC2 and the influence of different boundary conditions is shown.
Source:	Beton- und Stahlbetonbau 107 (2012), No. 2
Page/s:	96-105
Language of Publication:	German

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