Predicting the Tensile Behaviour of Ultra-High Performance Fibre-Reinforced Concrete from Single-Fibre Pull-Out Tests
Konstantin Hauch,
Kasem Maryamh,
Claudia Redenbach,
Jürgen Schnell
Affiliations
Konstantin Hauch
Department of Mathematics, Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany
Kasem Maryamh
Institute of Concrete Structures and Structural Design, Faculty of Civil Engineering, Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany
Claudia Redenbach
Department of Mathematics, Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany
Jürgen Schnell
Institute of Concrete Structures and Structural Design, Faculty of Civil Engineering, Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany
In this paper, a prediction model for the tensile behaviour of ultra-high performance fibre-reinforced concrete is proposed. It is based on integrating force contributions of all fibres crossing the crack plane. Piecewise linear models for the force contributions depending on fibre orientation and embedded length are fitted to force–slip curves obtained in single-fibre pull-out tests. Fibre characteristics in the crack are analysed in a micro-computed tomography image of a concrete sample. For more general predictions, a stochastic fibre model with a one-parametric orientation distribution is introduced. Simple estimators for the orientation parameter are presented, which only require fibre orientations in the crack plane. Our prediction method is calibrated to fit experimental tensile curves.
