|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
|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||URI:||http://hdl.handle.net/11420/14612||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|
|Appears in Collections:||Publications without fulltext|
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