Pedestrian and Cycling Bridge in Neckartenzlingen, Germany
Customer Project
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.
| Investor |
Town of Neckartenzlingen, Germany www.neckartenzlingen.de |
| Building and Structural Planning |
Ingenieurbüro Miebach Lohmar, Germany www.ib-miebach.de |
| Traffic Planning |
Ingenieurbüro Blankenhorn Nürtingen, Germany www.ing-blankenhorn.de |
| Construction |
Gottlob Brodbeck GmbH & Co. KG Metzingen, Germany www.g-brodbeck.de Schaffitzel Holzindustrie GmbH + Co. KG Schwaebisch Hall, Germany www.schaffitzel.de |
Dimensions
Model
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.
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 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.
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.
Project Location
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Once you have determined the final tendon geometry in RF‑TENDON, exporting the model to a CAD program can be useful. For this purpose, the module includes the option to export the file in the .dxf file format.
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Material Model Orthotropic Masonry 2D
The material model Orthotropic Masonry 2D is an elastoplastic model that additionally allows softening of the material, which can be different in the local x- and y-direction of a surface. The material model is suitable for (unreinforced) masonry walls with in-plane loads.
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Programs Used for Structural Analysis
Main Program
Structural engineering software for finite element analysis (FEA) of planar and spatial structural systems consisting of plates, walls, shells, members (beams), solids and contact elements
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