Traunbrücke Steyrermühl  -  Sprengungsüberwachung mit BRIMOS® Structural Health Monitoring

Blast of the Westbound Bridge Structure and Evaluation of its Affection on the remaining Eastbound Bridge Structure with BRIMOS® Structural Health Monitoring.

The bridge object is part of the A1 highway and was constructed in 1959. It is composed of 18-spans (reinforced concrete) and has a total length of 240,45 m. While the bridge structure — related with the driving direction Salzburg — was removed (blown) in August 2010, the remaining structure (driving direction Vienna) was monitored in order to evaluate the impact of the blasting with regard to its structural safety and operability. The investigation was focused on the primary load-bearing structure (arch).
Due to the fact that an initial dynamic measurement with BRIMOS® has been conducted already in 2005, the prevailing investigation (measurement 2010) could be configured more efficiently. Measurements at selected single bridge locations (HOT SPOTS) enabled a comprehensive documentation and quantification of the bridge's decisive structural behaviour and possible changes respectively. A direct comparison after 5 years of structural service life shows the progression of the measured structural resistance over time (bridge deck under the influence of traffic load and the bridge blasting).