Journals Proceedings

Abstract

Most reinforced concrete road bridges built in Argentina have their foundations or substructure constructed at the job site. On the other hand, the superstructure typically used consists of precast I-beams with an in situ slab that gives a monolithic connection.These beams are placed on top of elastomeric bearings, so relative movements between the substructure and the superstructure of the bridge may occur at the event of an earthquake. In order to limit these seismic displacements, buffers are constructed. They are reinforced concrete blocks fixed to the substructure. Their design is usually done following approximate hypothesis which, in highly seismic areas, may be very insecure.