Aue station bridge
Coordinates: 50 ° 35 ′ 27 ″ N , 12 ° 41 ′ 56 ″ E
| Aue station bridge | ||
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| Convicted | Federal Highway 169 | |
| Subjugated | Zwickauer Mulde , | |
| place | Aue | |
| overall length | 303.62 | |
| Longest span | 69 | |
| start of building | 1935 | |
| opening | 1937 | |
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The Aue station bridge was built from October 1935 and was the first prestressed girder bridge in Germany. On June 5, 1937, the building was opened to traffic under the name Adolf-Hitler-Brücke (today Bahnhofsbrücke ). The two-lane road bridge is part of the federal highway 169 and spans the Schlemaer Strasse, the Zwickauer Mulde , the Bahnhofsstrasse, the track of the station and the street Am Bahnhof in Aue .
construction
The 303.62 meter long prestressed concrete structure has ten fields with spans of 19.01, 23.25, 28.00, 41.05, 28.00, 24.81, 21.90, 25.20, 69.00 and 23 , 40 meters up. The main opening above the track of the station with a span of 69.0 meters consists of three sections. The middle part is a 31.5 meter long, suspended beam, which is supported on two 18.75 meter long cantilever arms. In the transverse direction, the superstructure has a T-beam cross-section , with the large spans above the pillars a box-girder cross-section with variable construction height.
The bridge was built by Dyckerhoff & Widmann AG based on a design by Franz Dischinger . The last three bridge fields on the northeast side, a total of 118 meters long and designed as three-field tannery girders, were externally prestressed according to a patent by Dischinger from 1934 . The tendons had a tensile strength of around 520 N / mm² and were prestressed to 220 N / mm². They consisted of round steel bars with a diameter of 70 millimeters and were arranged in the form of a hanging structure polygonally outside the concrete cross-section under the deck between the webs. This made it possible to re-tension it later, which was neglected in the war and post-war period. During an investigation in 1950, Dischinger did not find any threats to stability. The weak prestressing was reduced by 75% due to the creep and shrinkage of the concrete up to the first repair in 1962. This resulted in sagging of the suspension bracket totaling 20.0 centimeters. The poor state of construction of the bridge due to neglected maintenance, among other things the tie rods were corroded and in some areas the concrete quality was poor, finally led to the demolition of the technical monument in 1993 and the construction of the same construction until 1995.
literature
- Gerhard Mehlhorn: girder bridges. In: Gerhard Mehlhorn (Ed.): Handbook bridges. Design, construct, calculate, build and maintain. Springer, Berlin et al. 2007, ISBN 978-3-540-29659-1 , pp. 244, 347-388.
Web links
- Brandenburg University of Technology Cottbus-Senftenberg : List of projects by Franz Anton Dischinger
Individual evidence
- ↑ Federal Ministry of Transport, Building and Urban Development: Report on the quality, durability and safety of prestressed concrete bridges. Submission to the Committee for Transport, Building and Urban Development of the German Bundestag. ( Memento from May 15, 2012 in the Internet Archive ) Berlin, January 2006 (PDF; 148 kB)
- ^ Imperial patent 727 429, reinforced concrete structure, especially for girder bridges
- ^ Karl Kordina: Franz Dischinger. Designer of thin-walled trays and bridges made of concrete. In: Deutsche Bauzeitung , issue 2/2005, pp. 68–75
- ↑ ISP Scholz Consulting Engineers: Repair of the Aue station bridge. ( Memento from October 25, 2007 in the Internet Archive )