Dillinger LP Plates Used in Neckar Bridge in Germany
The elegant steel sails, which give the bridge its unique shape, are made of massive steel plates whose thickness increases steadily over the course of the
The elegant steel sails, which give the bridge its unique shape, are made of massive steel plates whose thickness increases steadily over the course of the tension chords to the mast heads. In order to be able to achieve this, Dillinger longitudinally profiled plates (LP plates) were used in thicknesses of up to 125 mm. For the highly stressed mast heads at the end of the steel sails, plate thicknesses of up to 200 mm (in the middle beam) were even required, which was realized using special Dillinger S460QL plates with toughness requirements significantly exceeding the standard. Thus, in this impressive project, high strength fine grained structural steel plates with such thicknesses were even used for the first time on a railway bridge in the DB AG network.
Another special feature for this bridge is the use of very heavy TM plates S460 ML > 30 t to reduce the construction site joints in the sails.
The railway bridge over the river Neckar will be essential to connect the new railway main station of Stuttgart with the northern and eastern rail routes in Germany. The bridge is designed as a steel composite bridge, where the steel longitudinal structure is composed of three longitudinal beams along the median and on either side of the deck, in combination with “steel-sails” supporting the main bridge’s longitudinal beams. The reinforced concrete deck slab is in composite action with the regularly spaced steel cross-beams. The form of the sails has been optimized to reduce the plate thickness to a minimum. High performance steel shall be used for the highly stressed tension ties, which connect the sails with the masts. Another specifically designed detail is the series of slender columns, of which nine take the horizontal braking forces of the trains.