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Publisher DOI: 10.1002/suco.202000435
Title: Numerical study on the mechanical behavior of ultrahigh performance concrete using a three-phase discrete element model
Language: English
Authors: Rybczynski, Sebastian 
Dosta, Maksym 
Schaan, Gunnar 
Ritter, Martin  
Schmidt-Döhl, Frank Michael  
Keywords: concrete fracture; discrete element method; SEM; ultrahigh performance concrete
Issue Date: Feb-2022
Publisher: Wiley
Source: Structural Concrete 23 (1): 548-563 (2022-02)
Abstract (english): 
Structural Concrete published by John Wiley & Sons Ltd on behalf of International Federation for Structural Concrete This paper deals with numerical analysis on the mechanical behavior of ultrahigh performance concrete (UHPC) under uniaxial compression. For the modeling of the mechanical behavior of UHPC, the mesh-free discrete element method was applied. To calibrate the model parameters and validate the numerical simulation results, a set of experimental investigations including mechanical tests, microscopy and tomography analysis, were performed. The scanning electron microscopy and polarized light microscopy were used to examine cross sections of UHPC as well as to characterize interfacial transition zone and aggregate in detail. X-ray microtomography analysis was used to obtain information about the nonspherical shape of aggregate and to generate a realistic structural model. Simulation results have shown that the developed model predict stiffness reliably, strength, and breakage pattern of UHPC and shows good agreement with experimental results. Finally, the model has been applied to analyze the main crack initiation in static failure and to investigate the influence of different parameters such as aggregate content as well as aggregate and binder stiffness on the mechanical behavior of UHPC.
DOI: 10.15480/882.3375
ISSN: 1464-4177
Journal: Structural concrete 
Institute: Feststoffverfahrenstechnik und Partikeltechnologie V-3 
Betriebseinheit Elektronenmikroskopie M-26 
Mehrskalensimulation von Feststoffsystemen V-EXK1 
Baustoffe, Bauphysik und Bauchemie B-3 
Document Type: Article
Project: SPP 2020: Zyklische Schädigungsprozesse in Hochleistungsbetonen im Experimental-Virtual-Lab 
SPP 2020 - Teilprojekt: Hochauflösende elektronenmikroskopische Untersuchungen zum Ermüdungsverhalten von Hochleistungsbetonen und mehrskalige Modelierung mittels Bonded Particle Model 
Projekt DEAL 
Funded by: Deutsche Forschungsgemeinschaft (DFG) 
License: CC BY-NC-ND 4.0 (Attribution-NonCommercial-NoDerivatives) CC BY-NC-ND 4.0 (Attribution-NonCommercial-NoDerivatives)
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