Isarsteg Nord near Freising, Germany
Customer Project
The bridge structure of Isarsteg as integrating artwork fits perfectly into the surrounding landscape. Taking nature as an example, the bridge spans the Isar river like a branched limb. Together, the ramps, stairs, columns, and horizontal beams represent the spatial framework. The pedestrian and cycle bridge, in total 525 ft long, was made of weather-resistant structural steel, S355 J2G2W (corten steel).
| Client |
City of Freising, Building Division of the Municipal Administration for Road and Bridge Construction www.freising.de |
| Project Management, Structural Analysis |
Bergmeister Ingenieure GmbH www.bergmeister.it |
| Structural Design |
Arch. Christoph Mayr, J2M Architekten www.j2m-architekten.de Dr.-Ing. Josef Taferner, Bergmeister Ingenieure GmbH Dr.-Ing. Oliver Englhardt, &structures |
| Final Planning |
Dipl.-Ing. Matthias Gander und Dipl.-Ing. Philipp Prighel, Bergmeister Ingenieure GmbH Prof. Antonio Capsoni, B&C Associati www.bieciassociati.it |
Model
The engineering office Bergmeister Ingenieure used the RFEM and SHAPE-THIN programs for the structural analysis of the 3D structure.
Structure
The structural design of the bridge was carried out in a sustainable manner. The slim bridge is a rigid, statically indeterminate frame structure. All components, including the foundation and the abutment, are rigidly connected to each other.
The maximum span of the bridge amounts to 180 ft and the width to 12.30 ft. The superstructure, the columns, and the stairs consist of keel-shaped, torsional rigid box sections.
The bridge deck consists of a reinforced concrete flange with a thickness of 5.9 in and a concrete quality of C35/45. It is rigidly connected to the cover plate t = 0.98 in of the steel box section by welded studs. The studs have a distance of 1.64 ft in the transverse direction and 1.97 ft in the longitudinal direction.
The bridge has been cambered by the deformation components from the self-weight. Under the maximum variable load, the structure deforms by about 4.4 in, which corresponds to l/504. The dynamic analysis resulted in a natural frequency of 1.33 Hz for the first mode shape. To ensure user comfort, a vibration damper was arranged.
The aesthetic structure of the Isarsteg received the German Steel Construction Award in 2016 and second place in the Engineering Prize of the Bavarian Chamber of Engineers in 2017. Moreover, it received a nomination for the German Bridge Engineering Award in 2018.
Project Location
Write Comment...
Write Comment...
Contact us
Do you have questions or need advice?
Contact our free e-mail, chat, or forum support or find various suggested solutions and useful tips on our FAQ page.
New
Parametrization of Rolled Cross-Sections
Rolled sections, the most common cross‑section type in RFEM and RSTAB, can also have user‑defined parameters.
- How do I apply wind load on members of open structures?
- Is it also possible to use RF‑/TOWER Loading without the other TOWER add-on modules?
- I do not want to design a cross-section in the RF‑/STEEL EC3 add-on module. Can I quickly remove this cross-section from the selection?
- I have a roof structure resting on a steel column that runs to the foundations. The column runs through a perimeter wall that supports the false ceiling. A considerable part of the load from the roof is transferred to the wall. I want the steel column to carry all the vertical loads from the roof. How can I do it?
- Are the models and presentations from Info Day 2018 freely available, and can you send them to me?
- I encountered a sharing violation while importing a dxf file into SHAPE-THIN. What is the issue?
- In RF‑CONCRETE Surfaces, I obtain a high amount of reinforcement in relation to a lever arm that is almost zero. How is such a small lever arm of internal forces created?
- How can I display membrane stresses in the results of RF‑STEEL Surfaces?
- What is the meaning of the superposition according to the CQC rule in a dynamic analysis??
- How is the automatic creation of c/t-parts carried out?
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
3,540.00 USD
Add-on Module
Design of reinforced concrete members and surfaces (plates, walls, planar structures, shells)
810.00 USD
Add-on Module
Stress analysis of steel surfaces and members
1,030.00 USD
Add-on Module
Stability analysis according to the eigenvalue method
1,030.00 USD
Add-on Module
Consideration of construction stages during a building phase
850.00 USD
