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Author(s):	Wagner, Peter
Title:
Abstract:	Im Stahl- und Verbundbrückenbau haben sich in den letzten Jahrzehnten Querschnittsausbildungen unter Verwendung von ein- oder mehrzelligen Stahlhohlkästen allgemein durchgesetzt, da diese Bauweise technisch-wirtschaftliche Vorteile aufweist und dank ihrer glatten und geschlossenen Außenflächen sehr gute Prüfungs- und Unterhaltungsmöglichkeiten von außen bietet. Um auch die Innenflächen von begehbaren Hohlkästen ausreichend gegen Korrosion zu schützen und eine Prüfung und Unterhaltung der Innenräume zu ermöglichen, kam hierbei in der Regel ein dreilagiger Innenanstrich zur Ausführung und es wurden umfangreiche stationäre oder auch bewegliche Begehungseinrichtungen installiert. Beide Maßnahmen führen zu einem relativ hohen Kostenaufwand sowohl bei der Herstellung als auch bei der laufenden Wartung und Unterhaltung des Brückenbauwerks. Der vorliegende Beitrag berichtet über die in jüngster Zeit verstärkten Bemühungen, einerseits neue Querschnittsformen zu entwickeln und andererseits fortschrittliche und auf diese Querschnitte abgestimmte Verfahren zum Innenkorrosionsschutz und zur Begehung von derartigen Brücken einzusetzen. Advanced methods for the inside protection against corrosion and the accessibility of bridges with advanced box-girder design. Steel- and composite bridges with single- or multi-cell box girder designs have succeeded during the last decades because these bridge types show important technical and economical advantages. Furthermore they could offer excellent conditions for the inspection and maintenance of the outside of the structure due to their plain and closed steel surfaces. In order to secure proper protection against corrosion of the inside of the box girders as well and to enable a good accessibility for reasons of inspection and maintenance, there has usually been applied a painting system consisting of three coats and there have been installed permanent gangways and/or movable inspection gantries inside the box girders. Both measures naturally imply relatively high costs both for the original implementation and the running inspection and maintenance of the inside of the box girders. As a consequence, nowadays has been made every effort to develop advanced cross section designs on the one hand and to implement progressive methods for the inside protection against corrosion on the other hand which could fit in perfectly to these new cross sections. This paper will describe the new developments in the field of inside protection against corrosion in connection with advanced bridge designs.
Source:	Stahlbau 85 (2016), No. 2
Page/s:	86-111
Language of Publication:	German

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