Publisher DOI: 10.1201/9781003348443-215
Title: Numerical and experimental analysis of fatigue-induced changes in ultra-high performance concrete
Language: English
Authors: Rybczynski, Sebastian 
Schmidt-Döhl, Frank  
Schaan, Gunnar 
Ritter, Martin  
Dosta, Maksym 
Issue Date: Sep-2022
Source: 8th International Conference on Structural Engineering, Mechanics and Computation (SEMC 2022)
Abstract (english): 
This contribution deals with experimental and numerical results on the fatigue behavior of Ultra-High Performance Concrete (UHPC). In order to characterize fatigue-induced changes in detail, UHPC samples were examined using scanning and transmission electron microscopy (SEM and TEM). It could be shown that a densification of the binder matrix occurs caused by a transformation of nanoscale ettringite, and the content of unhydrated cement clinker influences the fatigue resistance of UHPC. For numerical investigations of the mechanical behavior of UHPC, the Bonded-Particle Model (BPM) has been used and calibrated with experimental data. The mesoscopic BPM model consists of three phases: Matrix, ITZ (Interfacial Transition Zone), and aggregate. A newly derived rheological fatigue formulation for binder and ITZ bonds was developed to apply small scale-changes and plastic deformations to reproduce the correct fatigue behavior.
Conference: 8th International Conference on Structural Engineering, Mechanics and Computation, SEMC 2022 
ISBN: 9781003348443
Journal: Proceedings of the 8th International Conference on Structural Engineering, Mechanics and Computation, 2022 
Institute: Feststoffverfahrenstechnik und Partikeltechnologie V-3 
Baustoffe, Bauphysik und Bauchemie B-3 
Betriebseinheit Elektronenmikroskopie M-26 
Document Type: Chapter/Article (Proceedings)
Project: SPP 2020: Zyklische Schädigungsprozesse in Hochleistungsbetonen im Experimental-Virtual-Lab 
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