Dokument-ID Dokumenttyp Autoren/innen Persönliche Herausgeber/innen Haupttitel Abstract Auflage Verlagsort Verlag Herausgeber (Institution) Erscheinungsjahr Titel des übergeordneten Werkes Jahrgang/Band ISBN Veranstaltung Veranstaltungsort Beginndatum der Veranstaltung Enddatum der Veranstaltung Ausgabe/Heft Erste Seite Letzte Seite URN DOI Lizenz Datum der Freischaltung OPUS4-25532 Zeitschriftenartikel Vasilic, Ksenija; Meng, Birgit; Kühne, Hans-Carsten; Roussel, N. Flow of fresh concrete through steel bars: a porous medium analogy Although being a very promising area of concrete technology, computational modeling of fresh concrete flow is a comprehensive and time consuming task. The complexity and required computation time are additionally increased when simulating casting of heavily reinforced sections, where each single reinforcement bar has to be modeled. In order to improve the computation speed and to get closer to a practical tool for simulation of casting processes, an innovative approach to model reinforced sections is proposed here. The basic idea of this approach is to treat the reinforcement zone as a porous medium in which a concrete is propagating. In the present paper, the numerical implementation of this concept is described. A methodology allowing for the computation of the equivalent permeability of the steel bars network is suggested. Finally, this numerical technique efficiency is evaluated by a comparison with experimental results of model fluids casting in model formworks. New York, NY Pergamon Press 2011 Cement and concrete research 41 5 496 503 10.1016/j.cemconres.2011.01.013 2016-02-19 OPUS4-37446 Beitrag zu einem Tagungsband Vasilic, Ksenija; Kühne, Hans-Carsten; Schmidt, Wolfram; Roussel, N. Numerical simulations of scc casting: parameter determination The paper addresses numerical modelling of fresh self-compacting concrete. In the previous studies, a numerical tool for casting prediction is built based on the assumption that fresh concrete behaves as a yield-stress fluid and treating zones with rebars as porous media. The present contribution discusses the determination of material parameters, which are required as an input for numerical simulations of casting processes. Paris, France RILEM Publications S.A.R.L. 2016 Proceedings of the International RILEM Conference on Materials, Systems and Structures in Civil Engineering 2016, Segment on Fresh Concrete 978-2-35158-184-1 International RILEM Conference on Materials, Systems and Structures in Civil Engineering 2016, Segment on Fresh Concrete Lyngby, Denmark 22.08.2016 24.08.2016 163 172 2016-09-21