Ældre betonbroers bæreevne (Load bearing capacity of old concrete bridges)

Two old bridges have been analysed in connection with their demolition. The first one is a pedestrian bridge, the Gefion bridge, from 1894. This is the first bridge of reinforced concrete in Denmark. Here the creep in the concrete severely have changed the way in which the load on the bridge was carried. - The other is a motor way bridge from 1939, which were reinforced 1991 with external steel plates on the areas of shear on the beams.

Four beams were carried to our laboratory and load tested. The steel plates have doubled the load bearing capacity of the beams.