Stochastische Abschätzung der Versagenswahrscheinlichkeit von Spannbetontragwerken infolge Spannungsrisskorrosion unter Berücksichtigung verschiedener Schädigungsverteilungen

Stochastic estimation for failure probability of prestressed concrete members due to stress corrosion considering different failure processes of tendons.

The hardened and tempered prestressing steel, which was manufactured by 1965, exhibits a high sensibility to stress corrosion. The loss for the bearing capacity of the individual tendon during the service life can not be excluded, both for bridges and building structures. However, in this contribution, by using stochastic method, it is demonstrated that the failure probability for existing prestressed concrete structures without prior announcement by cracking is very small. For a better statistical estimation, the inspection of the failure processes of the tendons in structures is very helpful.