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BOND BEHAVIOUR OF TWO DIFFERENT SHAPED STEEL FIBER IN ULTRA-HIGH-PERFORMANCE CONCRETE



Author(s): Chaohui Zhang, Caijun Shi and Zeimei Wu
Paper category: Proceedings
Book title: Proceedings of the 2nd International Conference on UHPC Materials and Structures (UHPC2018-China)
Editor(s): Caijun Shi and Baochun Chen
ISBN: 978-2-35158-219-0
e-ISBN: 978-2-35158-220-6
Publisher: RILEM Publications SARL
Publication year: 2018
Pages: 410-417
Total Pages: 8
Language : English


Abstract: In this work, the bond behaviors of two different steel fiber in Ultra-High-Performance
Concrete (UHPC) by numerical simulation with Finite Element Method (FEM) are
investigated. Different silica fume content and different curing time of UHPC are considered.
In addition, a revised bilinear-separation constitutive relationship was proposed to analyze the
bonding behavior between fiber and matrix. According to the results of the experiment and
numerical simulation, the pullout load of the straight fiber continues to decrease after reaching
the peak value, different from that, the pullout load of the hooked fiber presents a stable
platform stage with the displacement increases. The results of numerical simulation suggested
that hooked fiber needs more bond energy to be pullout than straight fiber. In addition,
hooked fiber will be straightened after being pulled out completely. The peak-load of
debonding of different fiber had been deeply affected by the content of silica fume at different
curing time.


Online publication : 2018
Publication type : full_text
Public price (Euros) : 0.00


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