Assessment of the shear strength of an existing post-tensioned concrete bridge with a low amount of shear reinforcement - First application of the 'Flexural Shear Crack' model in practice

摘要

In recent years it was reported several times, that within a static assessment according to current standards the shear strength of post-tensioned bridges, which were built in Austria before 1989, cannot be fulfilled any more. However, test results prove, that especially prestressed structures have additional load bearing capacities, which cannot be reproduced with current calculation models. In the framework of a pilot project a new developed shear model (Flexural Shear Crack Model) was used. In this paper the approach as well as the main results of a statical reevaluation of an existing post-tensioned road bridge at the Tauern Autobahn A10 will be presented.