Zusammenwirken von Faser- und Betonstahlbewehrung bei biegebeanspruchten UHPC-Bauteilen

Translated title of the contribution: Interactions of fibre and ordinary reinforcement in flexural loaded UHPC components

Michael Huß*, Roland Waldenhofer, Bernhard Freytag, Viet Tue Nguyen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Ultra high performance concrete (UHPC) offers great potential in terms of sustainable solutions for rehabilitation and strengthening of existing structures as well as resource-saving new constructions. In this context, the combination of fibre and ordinary reinforcement can be very effective due to the synergy effects regard-ing crack width limitation and braking of load drop after deformation localisation. Bending tests with different cross-section geometries and reinforcement combinations were carried out in order to confirm this assessment. Thanks to modern measuring methods, the crack width development could be continuously recorded over the entire test sequence, even for very fine cracks. The results show that the full effect of the reinforcing steel (yield strength) and the fibre reinforcement (post-cracking tensile strength) can be added together for the determination of the load-bearing capacity; independent of the fibre content. Furthermore, a simplified approach for the calculation of crack widths in the serviceability limit state was derived on the basis of the obtained measurement data.
Translated title of the contributionInteractions of fibre and ordinary reinforcement in flexural loaded UHPC components
Original languageGerman
JournalBeton- und Stahlbetonbau
Volume117
DOIs
Publication statusAccepted/In press - 2022

Keywords

  • UHPFRC
  • Combined reinforcement
  • Fibre reinforcement
  • Reinforcing steel
  • Crack width
  • Digital image correlation (DIC)

ASJC Scopus subject areas

  • Building and Construction

Fields of Expertise

  • Sustainable Systems

Treatment code (Nähere Zuordnung)

  • Experimental

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