Innovative Structural Products for Shear Strengthening of Concrete Bridges with pt Bars

Shear strengthening with PT bars is a common method to extend the life of concrete bridges (e.g., from the 1960ies) – both vertically to upgrade webs and also horizontally to strengthen slabs and their connection to the web. This article presents product solutions that have been developed and applied in recent years to adapt the pt bar in a perfect way to the existing structure considering aspects like adapt to shape/form, minimize impact to old structure, minimize material consumption, durability and also ease of installation. The following products will be presented by showing the idea, the R&D process and application on structures with many case studies in the Danube basin.