An Analysis of Steel Fiber Efficiency on Reinforced Concrete Beams and Slabs Subjected to Static and Cyclic Loads

Author(s): Buttigno T. E. T., Fernandes J. F., Sousa J. L. A. O. and Bittencourt T.
Paper category: Proceedings
Book title: Proceedings of International Conferences (ICACMS) Advances in Construction Materials and systems Vol 2
Editor(s): Manu Santhanam, Ravindra Gettu, Radhakrishna G. Pillai, Sunitha K. Nayar
ISBN: 978-2-35158-194-0
e-ISBN: 978-2-35158-191-9
Publisher: RILEM Publications SARL
Publication year: 2017
Pages: 332-341
Total Pages: 10
Language : English

Abstract: This paper investigates the efficiency of steel fiber incorporation in reinforced concrete (RC) elements submitted to static and cyclic loads. An extensive experimental campaign was carried out on RC slabs and RC beams without and with the addition of different amounts (20 kg/m3 and 60 kg/m3) of steel fibers. The results of four-point bending (4PB) static tests demonstrated that fiber's contribution was much more apparent on the RC slabs in relation to RC beams, especially regarding the improvement obtained in the material toughness. This aspect is important for structural design optimization since it is an indication that fiber effectiveness can be higher in RC slabs compared to RC beams. Static tests on RC beams have shown a small increment of the total deformation due to the incorporation of fibers. In contrast, the addition of steel fibers in RC slabs has significantly improved the ductility, highlighting fiber efficiency. In both cases, an increment in the flexural strength was noticed. Cyclic tests on RC slabs evidenced the positive effect of the fibers (crack bridging due to the pull-out effect) to reduce the maximum vertical displacement and postpone steel bars yielding point.

Online publication : 2017
Publication type : full_text
Public price (Euros) : 0.00