Investigation on fracture behaviour of UHPFRC using a mesoscale computational framework
- verfasst von
- Lu Hai, Yu Jie Huang, Peter Wriggers, Hui Zhang, Qing Hua Li
- Abstract
Ultra high performance fibre reinforced concrete (UHPFRC) demonstrates intricate failure mechanisms like fibre bending and yielding, mortar cracking, crushing and spalling, as well as fibre-mortar interfacial debonding. These are often beyond the resolutions of conventional experiments as well as homogeneous models and motivate the need for more refined models. This study develops a novel computational framework to elucidate the various mesoscale failure mechanisms of UHPFRC that can occur concurrently or consecutively. A bi-scalar damage-plasticity model (Wu-Li model) is employed to efficiently capture the failure characteristics of mortar. Nonlinear cohesive elements are inserted between fibres and mortar to explicitly simulate the interfacial bonding and debonding behaviour. The UHPFRC models are validated by pullout tests of single steel fibres with different inclination angles and direct tensile tests of UHPFRC samples with many oriented/un-oriented fibres. Afterwards, this work conducts comprehensive parametric analyses to quantify the influences of key material and geometric properties. The developed framework holds promise to enhance the understanding of UHPFRC damage and fracture behaviour.
- Organisationseinheit(en)
-
Institut für Kontinuumsmechanik
- Externe Organisation(en)
-
Ocean University of China
North University of China
Zhejiang University
- Typ
- Artikel
- Journal
- Computer Methods in Applied Mechanics and Engineering
- Band
- 421
- Anzahl der Seiten
- 22
- ISSN
- 0045-7825
- Publikationsdatum
- 01.03.2024
- Publikationsstatus
- Veröffentlicht
- Peer-reviewed
- Ja
- ASJC Scopus Sachgebiete
- Numerische Mechanik, Werkstoffmechanik, Maschinenbau, Physik und Astronomie (insg.), Angewandte Informatik
- Elektronische Version(en)
-
https://doi.org/10.1016/j.cma.2024.116796 (Zugang:
Geschlossen)
