Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Simulating fresh concrete behaviour - establishing a link between the Bingham model and parameters of a DEM-based numerical model
The paper presents an approach aimed at establishing a link between the rheological properties of fresh concrete and the parameters of DEM-based models. In particular, an algorithm for deriving the bond strength parameter of the DEM model from a given value of yield stress according to the Bingham model was developed. The keystone of the algorithm was comparison of the analytically predicted stress distributions in the Abram's cone filled with concrete and the corresponding force distribution obtained from corresponding numerical simulation by means of DEM, both calculations performed before cone lifting. Subsequently, the quality of such parameter estimation was verified by comparing the final shape of the concrete cake obtained from the numerical simulation (with the derived value of the bond strength) and the corresponding prediction by analytical formula. It was found that the numerical simulation provided quantitatively correct results. Further verification of the modelling approach is a subject of ongoing investigations which include analytical solutions for other test geometries, real experiments and corresponding numerical predictions.
Simulating fresh concrete behaviour - establishing a link between the Bingham model and parameters of a DEM-based numerical model
The paper presents an approach aimed at establishing a link between the rheological properties of fresh concrete and the parameters of DEM-based models. In particular, an algorithm for deriving the bond strength parameter of the DEM model from a given value of yield stress according to the Bingham model was developed. The keystone of the algorithm was comparison of the analytically predicted stress distributions in the Abram's cone filled with concrete and the corresponding force distribution obtained from corresponding numerical simulation by means of DEM, both calculations performed before cone lifting. Subsequently, the quality of such parameter estimation was verified by comparing the final shape of the concrete cake obtained from the numerical simulation (with the derived value of the bond strength) and the corresponding prediction by analytical formula. It was found that the numerical simulation provided quantitatively correct results. Further verification of the modelling approach is a subject of ongoing investigations which include analytical solutions for other test geometries, real experiments and corresponding numerical predictions.
Simulating fresh concrete behaviour - establishing a link between the Bingham model and parameters of a DEM-based numerical model
Simulation des Verhaltens von frischem Beton - Aufstellung einer Verbindung zwischen dem Bingham-Modell und den Parametern eines numerischen DEM-basierten Modells
Shyshko, S. (Autor:in) / Mechtcherine, V. (Autor:in)
2010
9 Seiten, 6 Bilder, 1 Tabelle, 7 Quellen
Aufsatz (Konferenz)
Englisch
Generalised Bingham Description of fresh Concrete
| British Library Conference Proceedings | 2002
A simulating model for segregation in fresh concrete
| Tema Archiv | 2002
A Simulating Model for Segregation in Fresh Concrete
| British Library Conference Proceedings | 2002
Simulating the behaviour of fresh concrete using distinct element method
| British Library Conference Proceedings | 2007