Naslov
Design and construction of Krka bridge near Skradin

Autori
Šavor, Zlatko ; Mujkanović, Nijaz ; Hrelja, Gordana

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Bridges / Radić, Jure - Zagreb, 2006, 85-96

Skup
International conference on bridges

Mjesto i datum
Dubrovnik, Hrvatska, 21.05.2006. - 24.05.2006

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Arch; Bridge; Bridge design; Composite Superstructure

Sažetak
A new concrete arch bridge with 204.0 m span was constructed across the Krka River canyon on the section Skradin-Šibenik of the Adriatic highway. The bridge site lies in an environmentally protected area very close to the Krka national park. The superstructure is continuous with spans L=3x32.0+3x28.0+3x32.0+28.0+24.0=360.0 m comprising two main steel box-type beams spaced at 7.6 m, strong steel cross beams and a concrete deck plate in composite action with both main and cross beams. The application of the composite superstructure, made possible significant reduction of the dead weight and enhanced the bridge appearance in comparison to other Croatian concrete arch bridges. Because of the importance of the Krka River bridge and aggressive environment monitoring system was installed for measurements of deformations, local temperature values, movements in service at critical points and corrosion rate. The construction of the bridge across the Krka River canyon commenced in the year 2003 and was successfully completed in two years in 2005. The whole arch cross section was constructed by free cantilevering, on traveling formwork carriages, in segments 5.25 meters long, starting symmetrically from arch abutments. Piers at the arch abutments had to be extended by auxiliary steel staying pylons to facilitate successive cantilevering. The arch was supported during construction by stays equilibrated by anchor stays, connected to rock anchors. The steel superstructure grillage was erected by longitudinal launching in three phases. The concrete deck is formed from full depth precast slabs interconnected by on site concreting of longitudinal and transversal joints above shear connectors.

Izvorni jezik
Engleski

Znanstvena područja
Građevinarstvo

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