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  • International Database for Civil and Structural Engineering

Lully Viaduct

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General Information

Structural Type: Truss bridge
Function / usage: Motorway bridge / freeway bridge
Other name(s): Viaduc de Lully
Completed in: 1995
Status: in use

Geographic Information & Related Structures

Location: Lully, Fribourg, Switzerland, Europe
Carries
  • A1 Expressway

Technical Information

Dimensions

height 16 m
total length 964 m
span lengths 29.90 m - 21 x 42.75 m - 29.90 m
number of spans 23
bridge surface 26 456 m2
deck width 2 x 13.53 m
deck depth 3.85 m
girder depth 2.90 m
girder width 4.00 m

Materials

deck truss steel
deck slab reinforced concrete

Notes

The innovative design of the Lully viaduct proposes a light and transparent structure made of a triangular cross-section fabricated entirely from unstiffened circular tubes. The result is twin space trusses, with a typical span of 42.75 m. Each transversal triangular cross-section is 2.9 m high and 4.0 m wide, and is supported by a single slender pier. The largest diameters and thickness of the tubes are over 500 mm and nearly 70 mm respectively. Welded overlap K-joints and KK-joints form the brace-to-chord connections along the top and the bottom chords, respectively. The deck slab is connected directly to the top chord by uniformly distributed welded shear connectors.

Relevant Web Sites

Relevant Publications

Internal Information
Structure-ID: s0007824
Created: 13/01/2003
Last Updated: 07/10/2013