ABSTRACT
Donaustadtbrücke is a cable-stayed bridge over the Danube in Vienna, Austria. The bridge was erected as a road bridge for public buses in 1994. The inspection and maintenance concept included periodic visual inspection as well as periodic structural health monitoring activities like the measurement of the stay cable forces and of the dynamic characteristic of the bridge. In 2013 and 2014 remarkable stay cable vibrations were observed at the longest stays, which led to interruptions of the traffic of the bridge. Based on the measurement of the dynamic characteristic of the stays and the bridge deck, stay cable vibration measures were developed and installed. Additionally, a permanent monitoring system was installed. In 2015 damage was detected at the hinged columns at the south abutment. Measurements were carried out to assess the reasons for this damage. Furthermore a principal inspection of the bridge was done in 2015, followed by maintenance works.
