Pedestrian and Cycling Bridge in Neckartenzlingen, Germany

Customer Project

Building and Structural Planning Miebach Engineering Office
Lohmar, Germany
www.ib-miebach.de
Traffic Planning Blankenhorn Engineering Office
Nürtingen, Germany
www.ing-blankenhorn.de
Construction Gottlob Brodbeck GmbH & Co. KG
Metzingen, Germany
www.g-brodbeck.de

Schaffitzel Holzindustrie GmbH + Co. KG
Schwäbisch Hall, Germany
www.schaffitzel.de
Investor Town of Neckartenzlingen, Germany
www.neckartenzlingen.de

Length: ~ 96 m | Width: ~ 12 m | Height: ~ 2.5 m
Number of Nodes: 235 | Members: 152 | Cross-Sections: 14

The S‑shaped pedestrian and cycling bridge with the straight middle section across the Neckar river in Neckartenzlingen, Germany, has a total length of 96.30 m and a width of 3.00 m.

Both foreland areas are bent in the ground plan and have a radius of approximately 65.25 m. In this way, the course of access roads is considered in the ground plan.

Superstructure

The bridge superstructure consists of two stepped glued‑laminated timber beams coupled to each other and drilled to blocks. It spans three bays with the individual spans of about 25.90 m / 44.50 m / 25.90 m and a total length of 96.30 m of the Neckar river.

For efficient material utilisation, the cross‑section height is graduated from 80 cm up to 208 cm according to the loading. Due to the continuous structure, zero moment distributions result in the main bay. These were modelled as articulated joints. In this way, a reasonable transport size and a simplified assembly of the wooden structural elements were achieved.

Wood Protection

The supporting structure is optimally protected from weather conditions by its geometry (lateral stepping) and the top cover made from precast concrete panels (with lateral overhang, drainage channels below the structural joints and an additional sealing level on the timber beams). In order to verify these wood protection assumptions, a moisture monitoring system was arranged in the area of the highest cross‑section.

Substructure

The substructure consists of reinforced concrete abutments with a bored pile foundation as well as the intermediate supports comprised of reinforced concrete columns built on shallow foundations. In the bridge structure extension, the path continues to a ramp with a throughed supporting structure made of reinforced concrete.

Programs Used for Structural Analysis

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