Friedrich-Ebert-Bridge (Bonn)
The Friedrich-Ebert-Brücke , known locally as the North Bridge , is the northern of the three Rhine bridges in Bonn . It connects the Bonn district of Beuel with the Bonn district . The federal motorway 565 runs over it, which connects the A 61 , the A 555 and the A 59 with each other as the Bonn north bypass . It is located at Rhine kilometer 657.145 and crosses the Rhine at an angle of about 107.29 °. The bridge was opened to traffic on June 28, 1967 and named after the first Reich President of Germany Friedrich Ebert .
Building
The Friedrich Ebert Bridge, including the two approach bridges, is around 1290 m long. The Strombrücke was the first modern cable-stayed bridge to use a multi-cable system instead of the few stay cables that were previously common. The route of the motorway has an S-shape in the bridge area. In the sections of the approach bridges there are oppositely directed transition arches with radii of 644 m on the left bank of the Rhine and 1000 m on the right bank of the Rhine; the area in between with the river bridge is almost straight.
On the left bank of the Rhine, the bridge runs along the border between the districts of Bonn-Castell and Graurheindorf , which are part of the Bonn district ; the section on the right bank of the Rhine lies entirely in the Schwarzrheindorf / Vilich-Rheindorf district , which is part of the Beuel district.
Foreland bridge on the left bank of the Rhine
The foreland bridge on the left bank of the Rhine is a 660 m long elevated road made of prestressed concrete . Due to the Bonn-Auerberg junction, it is between 28.50 m and 44 m wide. The structure is a continuous beam over 21 fields with spans between 28 m and 44 m. The structure consists of two box girders and is prestressed lengthways and crossways.
Foreland bridge on the right bank of the Rhine
The foreland bridge on the right bank of the Rhine is a 110 m long continuous beam made of prestressed concrete over two fields with a 53.50 m span. The two separated superstructures consist of dreistegigen -beams , which are connected by two transverse support load-distributing to a cross plant. They were prestressed to a limited extent lengthways and transversely.
Power bridge
The river bridge is a 520.20 m long steel central girder cable-stayed bridge. The three-span structure has a central opening of 280 m, the outer spans are each 120.10 m. The supporting structure consists of the executed than 12.6 m wide hollow box stiffening girder, two on current pillars cross-section centrally located 55 m high, fully welded steel pylons and the group consisting of a total of 80 fan-shaped individual cables rope work which removes the stiffening carrier via the pylons. On a 29 m wide orthotropic plate made of steel lie two 12.50 m wide carriageways, each consisting of three lanes. The concrete caps form a 2.75 m wide cycle path in the north and a footpath that is also 2.75 m wide in the south. Overall, the bridge is 36.30 m wide.
history
planning
1960–1961 the most appropriate location for the Rhine bridge as close to the city as possible was examined. The route of the north bypass had to be adapted to the existing buildings and the location of the planned bridge. The draft was created by the Hagen civil engineer Hellmut Homberg , the Darmstadt architect Heinrich Bartmann contributed to the design. In mid-1963 the construction of the bridge, divided into three lots, was put out to tender. The contract was awarded to a consortium consisting of the construction companies Grün & Bilfinger , Philipp Holzmann , Paproth (substructure of the river bridge), Hein, Lehmann & Co. AG (superstructure of the river bridge) and Bauwens (right bank foreland bridge). The contract to build the foreland bridge on the left bank of the Rhine was awarded independently.
construction
The bridge was built between August 1964 and June 1967 according to the administrative design. A number of suggestions from the construction company Hein, Lehmann & Co. AG (e.g. the use of a box girder 12.6 m wide instead of the two main girders 25.2 m apart) were taken into account.
For the construction of the river piers, composite steel caissons were first moved from a shipyard to the construction site by floating and then concreted and lowered. The river pillars were made of solid reinforced concrete and faced with granite masonry.
The dividing pillars, located between the river and foreland bridge, were founded with a sheet pile wall box and then built as 33.00 m high reinforced concrete hollow piers with a width of 5.50 m.
The bridge was assembled in 27 m long cycles, which consisted of the prefabricated stiffening girder including the associated lane. After mutually adapting the joints (connecting surfaces between the construction stages), these were transported by ship to the installation site, where they were unloaded and assembled. The two side panels were assembled using auxiliary supports and a front-mounted device. Then the pylons were built with the help of 50 m long slewing masts. The subsequent assembly of the main span was carried out using a cantilever . After completion of each section, the associated supporting cables were installed and anchored both in the pylon and in the anchoring girders of the box. The ropes had been set to target dimensions and did not have to be re-tensioned.
Redevelopment
27 years after the bridge was completed, the pylons, stay cables and stiffening girders were renovated between 1994 and 1996. In addition to replacing the corrosion protection consisting of up to five layers, the load-bearing capacity of the construction parts was also examined. The ropes were subjected to a magnetic induction test.
Vibration of the stay cables
On the morning of June 12, 1998, a strong north-east wind set the stay cables of the Friedrich-Ebert-Bridge vibrating , causing the bridge to vibrate. Even if the stability of the bridge was not endangered, it was blocked for several hours until the ropes had been connected by square timbers, which stopped the vibrations. In order to prevent further occurrences of this kind, a total of 20 vibration dampers were subsequently installed.
General renovation
In July 2007, as part of the bridge inspection, which takes place every six years, it became known that a general overhaul of the Friedrich-Ebert-Brücke was planned and necessary soon. It was postponed for the time being due to the renovation and widening of the Kennedy Bridge, which was just a few kilometers to the south, and the associated traffic restrictions . According to later plans, the repair should be carried out in 2012, but should now be after a renewal of the lane crossings in the summer vacation 2014 - with only one lane in each direction of travel and, for the first time in North Rhine-Westphalia, an emergency lane for both directions - after multiple shifts Starting in 2018 [obsolete] and taking three to four years to complete. Since October 2016, heavy transports requiring a permit have no longer been allowed to pass the bridge due to static deficits that have been determined.
future
The expansion of the A565 and the bridge are listed in the federal transport route plan under the item “further requirements”. Landesbetrieb Strassen.NRW announced at the beginning of July 2018 that the Friedrich-Ebert-Brücke would be demolished by 2028 and completely replaced by a new building. As the North Rhine-Westphalian Transport Minister Hendrik Wüst announced at a public event on July 27, 2018, Bonn's north bridge should not be demolished before the completion of the Rhine span between Wesseling and Niederkassel - i.e. not before 2030.
literature
- H. Thul: The Friedrich-Ebert-Bridge over the Rhine in Bonn. In: The civil engineer. Vol. 46, Issue 9, 1971, ISSN 0005-6650 , pp. 327-333.
- Ursel Zänker, Jürgen Zänker: Building in Bonn room 49–69. Attempt to take stock (= art and antiquity on the Rhine. Guide to the Rheinisches Landesmuseum Bonn . No. 21 ). Rheinland-Verlag, 1969, ISSN 0075-725X , p. 202 .
Web links
References
- ^ Andreas Denk , Ingeborg Flagge : Architekturführer Bonn . Dietrich Reimer Verlag, Berlin 1997, ISBN 3-496-01150-5 , p. 75.
- ↑ Bartmann, Heinrich: card index of building projects no. 557, Darmstadt, July 4, 1964 - November 18, 1965, pp. 1–16
- ↑ Bonner General-Anzeiger . February 12, 1994, p. 6
- ↑ Bonner General-Anzeiger . June 13, 1998, p. 6
- ↑ Bonner General-Anzeiger : North Bridge is being renovated. January 12, 2011, accessed January 12, 2011 .
- ↑ Only one more week grace period , Rhein-Sieg-Anzeiger , June 27, 2014
- ↑ Planning and transport committees from Bonn and Siegburg meet together , press release from the city of Bonn from September 16, 2011
- ^ Bridge renovations in the Bonn area , Straßen.NRW
- ↑ Halftime on the north bridge , General-Anzeiger , July 24, 2014
- ↑ A565: Rehabilitation of the north bridge in Bonn ends on the weekend , Straßen.NRW , press release of August 13, 2014
- ↑ Motorway construction sites in and around Bonn , General-Anzeiger , November 18, 2014
- ↑ North bridge will not be renovated until 2018 , General-Anzeiger , June 13, 2015
- ↑ A565-Rheinbrücke Bonn-Nord: Heavy transports are no longer allowed to pass ( Memento of the original from October 8, 2016 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. , Straßen.NRW, press release of October 7, 2016
- ^ The north bridge in Bonn is being torn down , General-Anzeiger Bonn , July 9, 2018
- ↑ The new Rhine bridge should be ready by 2030 , General-Anzeiger Bonn , July 27, 2018
|
The next bridge upstream: Kennedy Bridge |
Bridges over the Rhine |
The next bridge downstream: Rodenkirchener Autobahnbrücke |
Coordinates: 50 ° 45 ′ 25 ″ N , 7 ° 6 ′ 2 ″ E