Conference proceedings article
Crack Formation and Tensile Behaviour of UHPC Reinforced with a Combination of Rebars and Fibres



Publication Details
Authors:
Leutbecher, T.; Fehling, E.
Editor:
Fehling, E.; Schmidt, M.; Stürwald, S.
Publisher:
kassel university press GmbH
Place:
Kassel
Publication year:
2008
Pages range:
497-504
Book title:
Ultra High Performance Concrete (UHPC), Second International Symposium on Ultra High Performance Concrete
Title of series:
Schriftenreihe Baustoffe und Massivbau
Volume number:
10

Abstract
To carry tensile loads beyond the tensile strength of fibre reinforced UHPC in beams or tensile members, fibres can be combined with conventional bar reinforcement or prestressing steel. Thereby, the structural and deformation behaviour in serviceability as well as in ultimate limit state is affected significantly. Based on equilibrium and compatibility, the introduced mechanical model enables to predict both the integral load-deformation-behaviour and the width of discrete cracks of UHPC-tensile members reinforced with rebars and fibres. Fundamentals are the well-known mechanical principles for cracked reinforced concrete and the stress-crack-opening-relationship of fibre concrete. The application of the proposed model to an extensive test series with numerous varied parameters shows a very good agreement even for fibre-reinforced UHPC with strain softening behaviour.


Keywords
combined reinforcement, crack width, durability, economic mix design, tensile behaviour

Last updated on 2019-25-07 at 12:47