Title:
UHPFRC Precast slabs and field-cast joints of the Isabey- Darnley pedestrian bridge
Author(s):
Charron, J.P.; Desmettre, C.; Cantin Bellemare, E.
Publication:
Symposium Paper
Volume:
343
Issue:
Appears on pages(s):
494-503
Keywords:
Ultra-High Performance Fiber Reinforced Concrete (UHPFRC); precast slabs; field-cast joints; pedestrian bridge; bending behavior.
DOI:
Date:
10/1/2020
Abstract:
A cast-in-place reinforced concrete footbridge built in 1967 suffering from extensive concrete spalling and rebar corrosion needed to be replaced. The use of a steel Pony-Warren truss combined with thin precast UHPFRC slabs linked by short UHPFRC field-cast joints
was selected to build an innovative, durable and aesthetic footbridge minimizing impact on traffic during construction. Material rationalization allowed respective reductions of 64 % and 91 % of concrete and rebar volumes in the slab in comparison to a conventional reinforced concrete slab. The design process was completed with non-linear finite element calculations to obtain an adequate behaviour of the UHPFRC slabs and joints at service and ultimate limit states. A full-size proof specimen was then tested under positive bending moment and confirmed being adequate and fulfilling all the design specifications. Construction of the
precast slab was successful and required less time than a conventional slab. The long-term performance provided by the UHPFRC slab will be followed up in the next decades.
Related References:
AFGC (2013). Bétons fibrés à ultra-hautes performances - Recommandations Association Française de Génie Civil, France.
Červenka, V.; Jendele, L.; and Červenka, J. (2014) Atean Program Documentation, Cervenka Consulting Ltd., Prague, Czech Republic, 290 pp.
Charron, J.-P., Denarié, E. and Brühwiler, E. (2008). Transport properties of water and glycol in an Ultra High Performance Fiber Reinforced Concrete (UHPFRC) under high tensile deformation. Cement and Concrete Research, 38, 689-698.
CSA (2006). Canadian Highway Bridge Design Code - CAN/CSAS6-06, Canadian Standards Association, Mississauga, Ontario, Canada
Desmettre, C. (2011). Contribution à l'étude de la perméabilité du béton armé sous sollicitations statiques et cycliques. Ph. D., École Polytechnique de Montréal, Montréal, Qc, Canada.
Hubert, M., Desmettre, C. and Charron, J.-P. (2015). Influence of fiber content and reinforcement ratio on the water permeability of reinforced concrete. Materials and Structures, 48(9), 2795-2807.
Jooss, M. and Reinhardt, H. W. (2002). Permeability and diffusivity of concrete as function of temperature. Cement and Concrete Research, 32, 1497-1504.
Lachance, F., Charron, J.-P. and Massicotte, B. (2016). Development of precast bridge slabs in high-performance fiber-reinforced concrete and ultra-high-performance fiberreinforced concrete. ACI Structural Journal, 113(5), 929.
Verger-Leboeuf, S., Charron, J.-P. and Massicotte, B. (2017). Design and Behavior of UHPFRC Field-Cast Transverse Connections between Precast Bridge Deck Elements. Journal of Bridge Engineering, 22(7).