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The importance of multiphysics and multiscale modelling of concrete to understand its complex macroscopic properties

  • Concrete is a complex material. Its properties evolve over time, especially at early age, and are dependent on environmental conditions, i.e. temperature and moisture conditions, as well as the composition of the material. This leads to a variety of macroscopic phenomena such as hydration/solidification/hardening, creep and shrinkage, thermal strains, damage and inelastic deformations. Most of these phenomena are characterized by specific set of model assumptions and often an additive decomposition of strains into elastic, plastic, shrinkage and creep components is performed. Each of these phenomena are investigated separately and a number of respective independent models have been designed. The interactions are then accounted for by adding appropriate correction factors or additional models for the particular interaction. This paper discusses the importance of reconsider even in the experimental phase the model assumptions required to generalize the experimental data into models usedConcrete is a complex material. Its properties evolve over time, especially at early age, and are dependent on environmental conditions, i.e. temperature and moisture conditions, as well as the composition of the material. This leads to a variety of macroscopic phenomena such as hydration/solidification/hardening, creep and shrinkage, thermal strains, damage and inelastic deformations. Most of these phenomena are characterized by specific set of model assumptions and often an additive decomposition of strains into elastic, plastic, shrinkage and creep components is performed. Each of these phenomena are investigated separately and a number of respective independent models have been designed. The interactions are then accounted for by adding appropriate correction factors or additional models for the particular interaction. This paper discusses the importance of reconsider even in the experimental phase the model assumptions required to generalize the experimental data into models used in design codes. It is especially underlined that the complex macroscopic behaviour of concrete is strongly influenced by its multiscale and multiphyscis nature and two examples (shrinkage and fatigue) of interacting phenomena are discussed.zeige mehrzeige weniger

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Autor*innen:Jörg F. UngerORCiD, Vitaliy Kindrachuk, Volker HirthammerORCiD, Thomas Titscher, Christoph Pohl
Dokumenttyp:Beitrag zu einem Tagungsband
Veröffentlichungsform:Verlagsliteratur
Sprache:Englisch
Titel des übergeordneten Werkes (Englisch):International RILEM Conference on Materials, Systems and Structures in Civil Engineering
Jahr der Erstveröffentlichung:2016
Verlag:International RILEM Conference on Materials, Systems and Structures in Civil Engineering, Conference segment on COST TU1404
Jahrgang/Band:1
Erste Seite:115
Letzte Seite:124
DDC-Klassifikation:Technik, Medizin, angewandte Wissenschaften / Ingenieurwissenschaften / Ingenieurbau
Freie Schlagwörter:Concrete; Multiphysics; Multiscale
Veranstaltung:International RILEM Conference on Materials, Systems and Structures in Civil Engineering
Veranstaltungsort:Lyngby, Denmark
Beginndatum der Veranstaltung:22.08.2016
Enddatum der Veranstaltung:24.08.2016
Verfügbarkeit des Dokuments:Datei im Netzwerk der BAM verfügbar ("Closed Access")
Datum der Freischaltung:13.12.2016
Referierte Publikation:Nein
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