Pedestrian and Cycling Bridge in Neckartenzlingen, Germany
The S‑shaped pedestrian and cycling bridge across the Neckar river in Germany has a total length of 316 ft and a width of 10 ft with a straight middle part.
Town of Neckartenzlingen, Germany
|Building and Structural Planning||
Gottlob Brodbeck GmbH & Co. KG
Schaffitzel Holzindustrie GmbH + Co. KG
Schwaebisch Hall, Germany
Both foreland areas are bent in the ground plan and have a radius of approximately 214 ft. In this way, the course of access roads is considered in the ground plan.
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 85 ft / 146 ft / 85 ft and a total length of 316 ft over the Neckar river.
For efficient material utilization, the cross‑section height is graduated from 31 1/2 in up to 82 in according to the loading. Due to the continuous structure, zero moment distributions result in the main bay. These were modeled as hinge (Gerber) joints. In this way, a reasonable transport size and a simplified assembly of the wooden structural elements were achieved.
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.
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.
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