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2022, vol. 65, br. 3, str. 115-129
Two new bridges over the River Vardar in Skopje
(naslov ne postoji na srpskom)
a"Ss. Cyril and Methodius" University, Faculty of Civil Engineering, Skopje, N. Macedonia
bPONTING Ltd., Maribor, Slovenia

Ključne reči: integral bridge; extradosed bridge; free cantilever method; box girder; construction stages; stay cables; pylons
(ne postoji na srpskom)
This paper presents some aspects of the design of two new bridges over the River Vardar in Skopje. "Mihajlo Apostolski" is an integral bridge, consisting of two separate structures (22.05 + 50.50 + 21.05 m = 93.6 m length and 15.3 m width). The bridge deck is made up of a two-cell prestressed cast-in-situ box girder with a parabolically variable cross section. The abutments and the piers are wall-shaped and supported on single and double row piles, respectively. The side spans, together with the approaching structures, were proposed to be built on traditional scaffolding, while the middle span over the minor riverbed was built with a free cantilever method. The extradosed bridge at Ljubljanska Street is 27.5 + 56 + 27.5 m = 111 m long and 24.1m wide. The ribbed deck (two post-tensioned main girders, cross girders, and deck slab) is supported from above by 32 parallel stay cables. The 12.6 m high pylons are located at the intermediate supports. In the base, the four piers have a rectangular cross section that has been rotated 45 degrees. The superstructure is supported by pot bearings. A deep foundation on piles was chosen. Cast-in-place construction of the superstructure was foreseen. The design of the bridges was done according to Eurocodes and respecting the fib and PTI recommendations. Detailed numerical analysis was carried out in the FEM software SOFiSTiK and additional auxiliary software.
*** DIN EN 124: Gully tops and manhole tops for vehicular and pedestrian areas: Definitions, classification, general principles of design, performance requirements and test methods. Part 1
*** (2002) EN 1991-1-1: Eurocode 1: Actions on structures: General actions: Densities, self-weight, imposed loads for buildings. Brussels, Belgium: European Committee for Standardization, Part 1-1
*** (2013) Richtlinien für den Entwurt und die Ausbildung von Ingenieurbauten. 10
*** (2002) EN 1990: Eurocode: Basis of structural design. Brussels, Belgium
*** EN 1317: Road restrained systems
*** (2003) EN 1991-1-5: Eurocode 1: Actions on structures: General actions: Thermal actions. Brussels, Belgium, Part 1-5
*** (2005) EN 1991-1-4: Eurocode 1: Actions on structures: General actions: Wind actions. Brussels, Belgium, Part 1-4
*** (2005) EN 1998-2: Eurocode 8: Design of structures for earthquake resistance: Bridges. Brussels, Belgium, Part 2
*** (2005) EN 1992-2: Eurocode 2: Design of concrete structures: Concrete bridges: Design and detailing rules. Brussels, Belgium
*** (2003) EN 1991-2: Eurocode 1: Actions on structures: Traffic loads on bridges. Brussels, Belgium, Part 2
*** (2011) ISO 25780: Plastics piping systems for pressure and non-pressure water supply, irrigation, drainage or sewerage: Glass-reinforced thermosetting plastics (GRP) systems based on unsaturated polyester (UP) resin: Pipes with flexible joints intended to b
*** (2004) EN1992-1-1: Eurocode 2: Design of concrete structures: General rules and rules for buildings. Brussels, Belgium: European committee for standardization (CEN), Part 1-1
Biliszczuk, J., Onysyk, J., Barcik, W., Toczkiewicz, R., Tukendorf, A. (2017) Extradosed Bridges in Poland: Design and Construction. Frontiers in Built Environment, 2: 1-9
Brand, W., Annan, R., de Oliveira, A.P.A., Bastien, J., Chandoga, M., Curran, P., Ciccone, T., Fischer, G., Georgakis, C., Glaeser, C., Goodyear, D., Gutsch, A., Hosoi, K., Ikehata, S., Kasuga, A. (2019) Acceptance of cable systems using prestressing steels. FIB Bulletin, 89
PTI Post-Tensioning Institute (2007) Recommendation for stay cable design, testing and installation

O članku

jezik rada: engleski
vrsta rada: stručni članak
DOI: 10.5937/GRMK2203115M
primljen: 23.08.2022.
revidiran: 03.09.2022.
prihvaćen: 03.09.2022.
objavljen onlajn: 30.09.2022.
objavljen u SCIndeksu: 30.09.2022.
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