immo!nvest – Die Plattform für Standorte und Immobilien

Tag: Oderbrücke

  • Lighter and stronger: new generation of network arch bridges

    Lighter and stronger: new generation of network arch bridges

    A new border bridge has been spanning the Oder near Küstrin since last year. It is held in place by a network arch with a span of 130 metres and 88 carbon girders. According to a recently published Empa press release, these carbon tensioning cables were developed by Carbo-Link, an Empa spin-off from Fehraltorf. The carbon carriers are made of carbon fibre reinforced plastic (CFRP).

    This innovative material not only enables flexible processing, but also saves a large amount of carbon dioxide that would be released by conventional steel constructions. The use of carbon fibre beams significantly reduces the dead weight compared to conventional flat steel hangers. Around 500 tonnes of steel and 1350 tonnes of reinforced concrete were saved in the construction.

    A major advantage of the new suspension cables is their high tensile strength and lower fatigue than steel. Most of the fatigue tests were carried out by a team from Empa’s Structural Engineering department and confirmed the necessary fatigue strength of the new CFRP material. “We have thus created the basis for a new generation of filigree network arch bridges with carbon hangers as load-bearing elements,” Giovanni Terrasi, Head of Empa’s Mechanical Systems Engineering department, is quoted as saying in the press release.

    Visually, the new materials offer design freedom, as the Oder bridge shows. Carbon girders have already been used in other bridge constructions, but the special feature of the Oder bridge is that it is being used for the first time for heavy goods railway transport. Trains can pass over it at a speed of 120 kilometres per hour. The bridge has been honoured with both the German Bridge Construction Award and the British Bridges International Award.

  • Pioneering civil engineering

    Pioneering civil engineering

    With a total length of 266 metres, the bridge replaces an outdated structure from 1926 that no longer met the requirements of modern rail traffic. The central component is a gleaming white network arch with a span of 130 metres, which spans the border river Oder without supports. Instead of classic flat steel cables, 88 carbon tension members made of carbon fibre-reinforced plastic are used. These hangers were largely developed, tested and assessed at the Empa Institute in Dübendorf. They replace the steel segments weighing several tonnes and thus significantly reduce the overall weight of the supporting structure. An advantage for material efficiency and design freedom.

    Economic and sustainable benefits
    The innovative bridge technology made it possible to save around 600 tonnes of steel and 1,350 tonnes of reinforced concrete. A project-specific scaffolding solution was used in the construction process to ensure efficient assembly and welding of the bridge segments. Thanks to the high fatigue, tensile and corrosion resistance of the carbon fibre cables, both the maintenance effort and the service life of the bridge are positively influenced. A sustainability study shows that the use of carbon causes around 20 per cent less CO₂ emissions than a conventional steel structure.

    International appeal and future potential
    The railway bridge can be used by freight and passenger trains at speeds of up to 120 km/h and fulfils the highest safety standards. Extensive tests by Empa confirmed the fatigue strength of the material under real loads. The bridge has received several awards, including the Bridges International Award and the German Bridge Construction Prize. It is regarded as a pioneer for the use of high-performance composite materials in infrastructure construction.

    New aesthetics and symbolic significance
    The striking, elegant arch creates an architectural accent in the border region and emphasises the connection between the countries. The network arch bridge with carbon hangers symbolises both technical innovation and ecological responsibility. In future, it could serve as a standard for comparable major projects in European rail transport.