CFRP tendons in UHPFRC - Bond behaviour and applications to folded and curved shells

Author(s): A. Stark, J. Hegger
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: 335 – 342
Total Pages: 8
Language: English

Abstract: 
In a priority programme of the German Research Foundation (DFG SPP 1542: Concrete light. Future concrete structures using bionic, mathematical and engineering form finding principles) [1] prestressed sandwich panels with thin folded and curved concrete layers will be developed and investigated.

In a first step, the bond behaviour of CFRP (Carbon Fibre Reinforced Plastics) tendons(single strut and seven-wire strands) in UHPFRC (Ultra-High Performance Fibre Reinforced Concrete), with a uniaxial compression strength fcm,28d of about 170 MPa, is analysed. Pull-out tests are carried out to investigate the minimum concrete cover and the local bond behaviour, namely the influence of the wedge-effect. Additionally, tests on the transfer length are performed to determine the minimum spacing of tendons as well as the minimum concrete cover in small-scale beam tests. With the information of these tests, the minimum dimensions of shells can be determined. In the future, further experimental and theoretical investigations on UHPFRC shells, prestressed with CFRP tendons, will be conducted.

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