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A continuum damage model for the simulation of concrete under cyclic loading

  • A continuum damage model for concrete is developed with a focus on fatigue under compressive stresses. This includes the possibility to model stress redistributions and capture size effects. In contrast to cycle based approaches, where damage is accumulated based on the number of full stress cycles, a strain based approach is developed that can capture cyclic degradation under variable loading cycles including different amplitudes and loading frequencies. The model is designed to represent failure under static loading as a particular case of fatigue failure after a single loading cycle. As a consequence, most of the material parameters can be deduced from statictests. Only a limit set of additional constitutive parameters is required to accurately describe the evolution under fatigue loading. Another advantage of the proposed model is the possibility to directly incorporate other multi-physics effects such as creep and shrinkage or thermal loading on the constitutive level. AA continuum damage model for concrete is developed with a focus on fatigue under compressive stresses. This includes the possibility to model stress redistributions and capture size effects. In contrast to cycle based approaches, where damage is accumulated based on the number of full stress cycles, a strain based approach is developed that can capture cyclic degradation under variable loading cycles including different amplitudes and loading frequencies. The model is designed to represent failure under static loading as a particular case of fatigue failure after a single loading cycle. As a consequence, most of the material parameters can be deduced from statictests. Only a limit set of additional constitutive parameters is required to accurately describe the evolution under fatigue loading. Another advantage of the proposed model is the possibility to directly incorporate other multi-physics effects such as creep and shrinkage or thermal loading on the constitutive level. A multiscale approach in time is presented to enable structural computations of fatigue failure with a reduced computational effort. The damage rate within the short time scale corresponding to a single cycle is computed based on a Fourier based approach. This evolution equation is then solved on the long time scale using different implicit and explicit time integration schemes. Their performance and some limitations for specific loading regimes is discussed.zeige mehrzeige weniger

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Metadaten
Autor*innen:Vitaliy Kindrachuk
Persönliche Herausgeber*innen:Thomas Titscher, Volker Hirthammer, Jörg F. Unger
Dokumenttyp:Beitrag zu einem Tagungsband
Veröffentlichungsform:Verlagsliteratur
Sprache:Englisch
Titel des übergeordneten Werkes (Englisch):Computational Modelling of Concrete and Concrete Structures (EURO-C 2018)
Jahr der Erstveröffentlichung:2018
Organisationseinheit der BAM:5 Werkstofftechnik
5 Werkstofftechnik / 5.2 Metallische Hochtemperaturwerkstoffe
5 Werkstofftechnik / 5.5 Materialmodellierung
7 Bauwerkssicherheit
7 Bauwerkssicherheit / 7.7 Modellierung und Simulation
Verlag:CRC Press, Taylor & Francis Group
Verlagsort:Leiden, The Netherland
Jahrgang/Band:2018
Erste Seite:155
Letzte Seite:164
DDC-Klassifikation:Technik, Medizin, angewandte Wissenschaften / Ingenieurwissenschaften / Ingenieurbau
Freie Schlagwörter:Continnum damage model; Simulation of concrete; Under cyclic loading
Themenfelder/Aktivitätsfelder der BAM:Infrastruktur
Veranstaltung:Euro-C, March 1st 2018
Veranstaltungsort:Bad Hofgastein, Austria
Beginndatum der Veranstaltung:26.02.2018
Enddatum der Veranstaltung:01.03.2018
URL:https://euro-c.tuwien.ac.at/home/
ISBN:978-1-315-18296-4
ISBN:978-1-138-74117-1
Verfügbarkeit des Dokuments:Datei im Netzwerk der BAM verfügbar ("Closed Access")
Datum der Freischaltung:03.07.2019
Referierte Publikation:Ja
Datum der Eintragung als referierte Publikation:03.07.2019
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