Health & Environmental Research Online (HERO)


Print Feedback Export to File
7549830 
Journal Article 
The First Extradosed Bridge in Slovenia 
Markelj, V; , 
2018 
1 
Structural Engineering International
ISSN: 1016-8664 
20 
4 
462-467 
WOS:000208316900022 
This paper presents the conceptual design and technical solutions for the bridge over the artificial lake of Ptuj (power plant reservoir on the Drava River) on the new south main road, which connects the city of Ptuj with the Maribor Zagreb motorway. The horizontal axis of the 430,0 m long and 18,0 m wide bridge has a radius of curvature of R = 460,0 m. The bridge is designed as an "extrados bridge," representing an intermediate form between girder bridges and cable-stayed bridges. Structural spans of the bridge are 65 + 100 + 100 + 100 + 65 = 430 m. In the cross section the bridge is a mono-cellular, box-shaped, longitudinally prestressed concrete girder; H = 2,70 m, with classic prestressing tendons inside and additional exterior extrados cables over the low pylons. The conceptual design won the open design competition in 2004 and the final tender design was completed in March 2005. The construction of the innovatively designed "extrados bridge" started in November 2005, and the bridge was opened for traffic in May 2007.