Jerusalem Bridge (North Bridge)
Coordinates: 52 ° 8 ′ 14 ″ N , 11 ° 39 ′ 16 ″ E
| Jerusalem Bridge (North Bridge) | ||
|---|---|---|
 |
||
| Convicted | Bundesstrasse 1 , tram | |
| Subjugated | Elbe , km 327.75 | |
| place | Magdeburg | |
| construction | Tied arch bridge | |
| overall length | 214 m | |
| width | 17.4 m | |
| Longest span | 130.87 m | |
| Clear height | 7.32 m above HSW | |
| completion | 1996 | |
| location | ||
|
||
The Jerusalem Bridge (north bridge) is one of two bridges that spans the Elbe at river kilometer 327.7 in Magdeburg as part of the north bridge train and, among other things, crosses Bundesstraße 1 .
New construction of the Jerusalem Bridge
Due to the strong increase in road traffic, the construction of a further Elbe bridge for western directional traffic began in 1994 downstream, i.e. north of the old bridge. In contrast to the old bridge, the structure was arranged at an angle to the river axis, but it has the same parameters in terms of clearance and structure height. The bridge was opened to traffic on October 4, 1996 as the Jerusalem Bridge with a 6.5 m wide carriageway for two lanes and a 5.0 m wide sidewalk and bike path. The 214.3 m long structure consists of two-sided approach bridges with 35.70 m or 47.71 m (before the installation of the additional piers, see section "Construction failure") as well as the river bridge. In contrast to the southern bridge, the structure system does not have a pure arch in the longitudinal direction of the bridge with massive abutments to absorb the horizontal thrust, but is designed as an anchored arch bridge ( tied arch bridge ).
.ajb.jpg)
The bridge has a span of 130.87 m with a lower width of 17.38 m. The arches are inclined 12 ° to the vertical in their plane and have a vertex height of 17.15 m in relation to the roadway. In the apex, the steel arches have welded box sections 0.75 m wide and 1.1 m high, as well as a center distance of around 9.5 m. They are connected to one another via a diamond-shaped framework. The two 2.35 m high stiffening girders with 16 hangers at a distance of 7.85 m on each side of the bridge, which consist of round steel profiles with a maximum diameter of 100 mm, are removed over the arches. To avoid vibrations induced by the simultaneous action of rain and wind, the hangers are braced together with thin horizontal ropes. The deck is made of reinforced concrete and is connected by head bolts to the cross members, which are arranged at a distance of 3.3 m.
The two-sided edge openings are as two-web -beams made with a composite cross-section. The steel girders of the 2.1 m high structures are arranged at a center distance of 7.5 m and are connected to the transversely prestressed reinforced concrete deck by head bolts.
Construction failure
The eastern foreland bridge, initially with a span of 47.71 m, sagged by 11 cm in the middle after all auxiliary supports were removed. One of the reasons for this could have been an insufficient elevation during the construction of the supporting structure. The carriageway slab was then completely demolished and the main bridge girders were then pushed up in the middle by 17 cm before the concrete was poured again. After removing the temporary supports, the bridge sagged again to an unacceptable degree. Then two additional steel columns were permanently attached in the middle of the bridge. Measurements with a load with two heavy mobile cranes , combined with a recalculation, showed that the modified structure was sufficiently load- bearing and usable .
literature
- Writings of the Association for European Inland Shipping and Waterways eV various years. WESKA (Western European Shipping and Port Calendar), Binnenschifffahrts-Verlag GmbH Duisburg-Ruhrort, OCLC 48960431
- Ingelore Buchholz, Jürgen Buchholz: Magdeburg Elbbrücken . In: Documentation 40/05, City Planning Office Magdeburg , pp. 79–99
- Erich Fiedler: Road bridges over the Elbe in Germany. A representation of the historical development of these bridges. Saxoprint, Dresden 2005, ISBN 3-9808879-6-0 .
Web links
Individual evidence
- ↑ http://www.wdl-dresden.de/info_ws.htm
- ↑ Homepage of the engineering office Prof. Peter Krüger
- ↑ a b K. Mildner: Deflection problems when building a composite steel bridge . In: Concrete and reinforced concrete construction . tape 94 , no. 5 , 1999, ISSN 1437-1006 , pp. 224–228 , doi : 10.1002 / best.199900710 ( wiley.com [accessed March 18, 2020]).
| upstream | Bridges over the Elbe | downstream |
| Jerusalem Bridge (South Bridge) | Jerusalem Bridge (North Bridge) |
Herrenkrug railway bridge |