BENDING BEHAVIOR OF PRECAST BRIDGE SLABS IN UHPFRC UNDER STATIC AND CYCLIC LOADINGS

Author(s): J.-P. Charron, F. Lachance and B. Massicotte
Book Title: Seventh International RILEM Conference on High Performance Fiber Reinforced Cement Composites (HPFRCC7)
Editor: H.W. Reinhardt, G.J. Parra-Montesinos, H. Garrecht
ISBN: 978-2-35158-145-2
e-ISBN: 978-2-35158-146-9
Publisher: RILEM Publications SARL
Publication year: 2015
Pages: 383-390
Total Pages: 8
Language: English

Abstract: New designs of precast bridge slabs made with a ultra-high fibre reinforced concrete (UHPFRC) were developed. A plain and a hybrid precast slabs in UHPFRC were designed; the hybrid slab consisted of a very thin layer of UHPFRC above a thicker layer of HPFRC. The outstanding properties of the UHPFRC permitted significant volume reductions of concrete and conventional reinforcement in the slabs. A reference slab made with High Performance Concrete (HPC) was also designed to allow comparison with the usual component installed on bridges. Static bending tests and cyclic bending tests, replicating circulation of a truck axle, were applied on slabs. The structural behavior of the three slabs is analysed and compared in terms of deflection, crack opening and ultimate strength. The static tests demonstrated that all three slab configurations exceeded largely the design criterion of ultimate strength, even after the application of cyclic loadings. The hybrid and UHPFRC slabs showed minor crack widths in service and fatigue conditions, whereas the reference HPC slab presented crack widths superior to the 0.25 mm criterion under the same conditions.

Online publication: 2015
Publication Type: full_text
Public price (Euros): 0.00