A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Design and Performance of a Precast Bridge Barrier with Ultra-high Performance Fibre Reinforced Concrete (UHPFRC)
The use of precast concrete barriers instead of cast-in-place barriers avoids early-age cracking due to restrained shrinkage and thermal effects and accelerates the construction process. For these reasons, Polytechnique Montreal has developed since 2009 several durable precast concrete barriers with fiber reinforced concretes and various connection types to the bridge slab. Due to the excellent mechanical and durability properties of ultra-high performance fibre reinforced concrete (UHPFRC), it was integrated recently in a precast barrier concept developed for the Quebec Ministry of Transportation (QMT). This paper presents the concept and the mechanical behaviour under eccentric loading of the TL-5 precast hybrid barrier composed of a NSC core and a UHPFRC shell and connected to the bridge slab through a reinforced UHPFRC connection. An experimental test was performed on a full scale 2 m precast hybrid barrier and was reproduced numerically. The validated model was then used to reproduce the Canadian Highway Bridge Design Code (CSA-S6) loading conditions and validate the performance of the hybrid barrier. The model showed that the hybrid barrier capacity is 69 % and 43 % higher than the ultimate design load required in CSA-S6 when submitted to centered and eccentric loadings, respectively.
Design and Performance of a Precast Bridge Barrier with Ultra-high Performance Fibre Reinforced Concrete (UHPFRC)
The use of precast concrete barriers instead of cast-in-place barriers avoids early-age cracking due to restrained shrinkage and thermal effects and accelerates the construction process. For these reasons, Polytechnique Montreal has developed since 2009 several durable precast concrete barriers with fiber reinforced concretes and various connection types to the bridge slab. Due to the excellent mechanical and durability properties of ultra-high performance fibre reinforced concrete (UHPFRC), it was integrated recently in a precast barrier concept developed for the Quebec Ministry of Transportation (QMT). This paper presents the concept and the mechanical behaviour under eccentric loading of the TL-5 precast hybrid barrier composed of a NSC core and a UHPFRC shell and connected to the bridge slab through a reinforced UHPFRC connection. An experimental test was performed on a full scale 2 m precast hybrid barrier and was reproduced numerically. The validated model was then used to reproduce the Canadian Highway Bridge Design Code (CSA-S6) loading conditions and validate the performance of the hybrid barrier. The model showed that the hybrid barrier capacity is 69 % and 43 % higher than the ultimate design load required in CSA-S6 when submitted to centered and eccentric loadings, respectively.
Design and Performance of a Precast Bridge Barrier with Ultra-high Performance Fibre Reinforced Concrete (UHPFRC)
RILEM Bookseries
Serna, Pedro (editor) / Llano-Torre, Aitor (editor) / Martí-Vargas, José R. (editor) / Navarro-Gregori, Juan (editor) / Desmettre, Clélia (author) / Charron, Jean-Philippe (author) / Gendron, Frédérick (author)
RILEM-fib International Symposium on Fibre Reinforced Concrete ; 2021 ; Valencia, Spain
Fibre Reinforced Concrete: Improvements and Innovations II ; Chapter: 41 ; 471-482
RILEM Bookseries ; 36
2021-09-05
12 pages
Article/Chapter (Book)
Electronic Resource
English
Ultra-High Performance Fibre Reinforced Concrete (UHPFRC) for connections between precast elements
| Online Contents | 2010
Shear Strength of Ultra High Performance Fiber Reinforced Concrete (UHPFRC) Precast Bridge Joint
| Springer Verlag | 2012