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Author(s):	Friedl, Caroline; Wernhart, Susanna; Scheidl, Christian; Proske, Dirk
Title:
Abstract:	Brückenbauwerke im alpinen Raum unterliegen verschiedenen Naturgefahren. Dazu zählen auch Muren. Murenereignisse führen nachweisbar auch zur Zerstörung von Brücken. Um Brücken für solche Einwirkungen zu bemessen, sind Angaben zur Anprallkraft von Muren notwendig. Für Murenanpralle gegen Pfeiler liegen umfangreiche, sowohl miniaturisierte als auch Realgrößenversuche vor. Für Brückenüberbauten sind bisher keine solchen Versuche bekannt. In diesem Beitrag werden miniaturisierte Murenanprallversuche an Massivbrückenquerschnitten vorgestellt. Basierend auf den Versuchsergebnissen werden Empfehlungen für die Bemessung von Massivbrücken in exponierten Lagen gegeben. Debris flow actions on concrete bridge superstructures Bridge structures in alpine areas are subject to various hazards. These also include debris flows. Debris flows events demonstrably also lead to the destruction of bridges. In order to design bridges for such hazards, information on the impact force of debris flow is necessary. For debris-flow impacts against piers, extensive miniaturized as well as real size tests are available. So far, no such tests are known for bridge superstructures. In this paper miniaturized debris-flow impact tests on concrete bridge cross-sections are presented. Based on the test results, recommendations for the design of concrete bridges in exposed locations are proposed.
Source:	Beton- und Stahlbetonbau 118 (2023), No. 9
Page/s:	649-661
Language of Publication:	German

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