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 | 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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