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Shear strength of pre-tensioned members in high strength fibre reinforced concrete

Author(s): L. Moreillon, J. Nseir, R. Suter, R. Le Roy
Paper category: Conference
Book title: 8th RILEM International Symposium on Fiber Reinforced Concrete: challenges and opportunities (BEFIB 2012)
Editor(s): Joaquim A.O. Barros
Print ISBN: 978-2-35158-132-2
e-ISBN: 978-2-35158-133-9
Publisher: RILEM Publications SARL
Pages: 1419 - 1431
Total Pages: 12
Language: English

This paper presents the results of an experimental campaign carried out at the University of Applied Sciences (HES-SO), Fribourg, on pre-tensioned members in High Strength Fibre Reinforced Concrete HSFRC. A total number of six shear-critical beams, 3.6 m span, and two full scale beams, 12 m span, have been tested in order to evaluate the shear and the flexural behaviour. The principal parameter was the fibres content. Tests results have highlighted the beneficial contribution of HSFRC on shear capacity and the ability of steel fibres to replace the minimum shear reinforcement. The HSFRC beams exhibited a higher stiffness in presence of diagonal shear cracks. The fibres controlled the development of the diagonal cracks even with a low content. For HSFRC members, from a fibres quantity of 40 kg/m3, the formation of critical shear cracks was significantly delayed due to the development of a secondary cracking pattern. The shear strength of the beams was evaluated using different models. This paper presents several recommendations and rules for the shear design of HSFRC pre-tensioned members.

Online publication: 2013
Publication Type: full_text
Public price (Euros): 0.00

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