Numerical modelling of the pull-out of hooked steel fibres from high-strength cementitious matrix,supplemented by experimental results |
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| Affiliation: | 1. Laboratory of Structural Analysis and Design, Dept. of Civil Engineering, University of Thessaly, 38334 Volos, Greece;2. Institute of Steel Structures, Aristotle University of Thessaloniki, 54006 Thessaloniki, Greece;1. Department of Architectural Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea;2. Department of Infrastructure Safety Research, Korea Institute of Civil Engineering and Building Technology, 283 Daehwa-dong, Goyangdae-ro, Ilsanseo-gu, Goyang-si, Gyeonggi-do 10223, Republic of Korea;1. Department of Civil Construction Engineering, Polytechnic School at the University of São Paulo Avenida Professor Almeida Prado, Travessa do Biênio, 83, 05424-970 São Paulo, Brazil;2. Institute of Technological Research, Avenida Professor Almeida Prado, Travessa do Biênio, 83, 05424-970 São Paulo, Brazil;3. Department of Structural and Geotechnical Engineering, Polytechnic School at the University of São Paulo, Avenida Professor Almeida Prado, Travessa do Biênio, 83, 05424-970 São Paulo, Brazil;4. Department of Construction Engineering, Polytechnic University of Catalonia, Jordi Girona, 1-3, 08034 Barcelona, Spain;1. Vrije Universiteit Brussel, Faculty of Engineering, Department of Mechanics of Materials and Constructions (MeMC), Brussels, Belgium;2. Vrije Universiteit Brussel, Faculty of Engineering, Department of Architectural Engineering (ARCH), Brussels, Belgium;1. Department of Architectural Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, South Korea;2. Department of Civil Engineering, King Mongkut’s University of Technology North Bangkok, 1518 Pracharat 1 Road, Wongsawang, Bangsue, Bangkok 10800, Thailand |
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| Abstract: | The paper deals with the numerical modelling of hooked steel fibres embedded in high-strength cementitious matrix. The pull-out of the fibres is first studied by means of accurate three-dimensional models which take into account the non linearities that are present in the physical model. The bonding properties of the fibre–matrix interface considered in the numerical model are based on experimental results of pull-out tests on straight fibres. The results of the numerical model are compared with respect to the results of experimental tests on hooked fibres. Then, the paper studies the effect of different fibre geometries to the load–displacement pull-out curves. It is concluded that fibres having a doubly bended shape have a superior behaviour compared to fibres having a single bended part. Finally, a simplified two-dimensional model is proposed that yield fast results which are similar to the ones obtained by its three-dimensional counterpart. |
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