Wide Span Girder Bridge, Neckartenzlingen DE

Neckartenzlingen, Germany

Engineers: Ingenieurbüro Miebach

Location: Neckersteig, 72654 Neckartenzlingen, Germany
Year: 2017
Client: Gemeinde Neckartenzlingen
Infrastructure planning: Ingenieurbüro Blankenhorn
Contractor Superstructure: Schaffitzel Holzindustrie GmbH
Contractor Abutment, Infrastructure: Gottlob Brodbeck GmbH & Co. KG

Dimensions:
Length: 96,00 m
Width: 3,00 m

Structure:
Main structure consisting of trepped block laminated glulam beams that follow a gentle S-shape. Railing including horizontal stainless steel wires and handrail of acetylated timber. Decking made of pre-cast concrete slabs with anti-slip surface.

Object planning:
Leistungsphasen 1-9

Structure planning:
Leistungsphasen 1-6
(according to German HOAI)

To develop and improve the Neckar Valley cycle path this bridge crosses the Neckar with an approximate length of 100m. With a width of 3.00m it provides enough space for pedestrians and cyclists. The S-shaped design is oriented to the connecting infrastructure. The considered load cases of 5,0kN / m² is in accordance with DIN 1991-2. The chosen design in form of a timber bridge with spans of 25,65m / 44,50m / 25,65 follows in ground plan an S-shape. The major span is straight at an angle of 85 gon above the Neckar. Both flood plain areas are curved in plan using a radius of 65,25m. On the Eastern side of the river the arc extends to the north, on the west to the south. For an efficient utilization of material the cross-section is graded according to the stress usage. The continuous beam creates moment diagram with zero crossings in the main span, which are designed as so-called Gerber hinge. In this way the design achieves sensible transport dimensions and a simplified assembly.