Using FRC and UHPFRC with conventional reinforcement for the seismic design and rehabilitation of bridge piers and for the design of bridge superstructure elements

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Canada is one of the world industrialised countries where strategic infrastructures are subjected to the most severe climatic conditions. In Quebec, 35% of the ±10000 bridges still need to be rehabilitated for gravity loads and durability [1]. This rehabilitation process quickly becomes a never ending cycle due to the limited durability of repairs with conventional concrete. Knowledge gained in the past decades on the seismic hazard and on the deficiencies of several concrete structures demonstrated the vulnerability of structures built before 1980. This particularly affects bridges in densely populated regions of Canada. In fact, 80% of bridges in Quebec were built prior to modern seismic provisions, from which only a very few have been rehabilitated to conform to current seismic standards. This affects many lifeline and major-route bridges.