Experimental investigations on UHP(FR)C beams with high strength reinforcement

Author(s): N. Randl, C. Simon, T. Mészöly
Paper category: Symposium
Book title: RILEM-fib-AFGC International Symposium on Ultra-High Performance Fibre-Reinforced Concrete
Editor(s): F. Toutlemonde, J. Resplendino
Print ISBN: 978-2-35158-130-8
e-ISBN: 978-2-35158-131-5
Publisher: RILEM Publications S.A.R.L
Pages: 557 – 566
Total Pages: 10
Language: English

Abstract: 
In the frame of a research project funded by the Austrian Research Foundation (FFG.) several investigations were performed concerning the overall behaviour of ultra high performance concrete members reinforced with different combinations of fibres and high grade steel bars. Small scale beams made out of UHPFRC with a compressive strength of about 180 MPa have been subjected to three- and four-point bending tests and using the results, the post cracking behaviour of the UHPFRC was back-calculated. In parallel large scale beams were subjected to four-point bending tests. These beams were reinforced with high grade steel reinforcement (St900/1100). The ULS and SLS behaviour have been investigated with and without fibres and with different reinforcement ratios. The failure loads and failure modes have been analysed with different analytic approaches in comparison to the test results. During the tests it turned out that the usage of about 2 % steel fibres increased the load bearing capacity of the present beams by about 15 % on average. It turned out that the combination of UHP(FR)C and high grade steel is promising for members subject to bending, provided the SLS criteria are paid special attention in design.

Online publication: 2014
Publication Type: full_text
Public price (Euros): 0.00