Damage and collapse mode of existing post tensioned precast concrete bridge: The case of Petrulla viaduct

A numerical investigation was also carried out in order to determine the local mechanisms that led to the collapse of a segment of the Petrulla Viaduct in the south of Italy (Sicily) after a widespread beam damage was found. The main damage is the consequence of both an inadequate grout cementitious mortar filling, capable of introducing chemicals by which corrosion travelled along the tendons, and an inadequate distance among the ducts employed. The latter produces rotation of the wings around a point in the transversal section.