Concrete Frame Bridges

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	*National Information Service for Earthquake Engineering* *University of California, Berkeley*


	Frame bridges are used where space is not available for side spans and where simply supported beams would require too much construction depth. A special type of frame bridge is that with V-shaped piers.



	H30. Overall view.

ROSENSTEIN BRIDGE ACROSS THE NECKAR RIVER AT STUTTGART
(1951-53)

Four-lane street and two-track streetcar bridge, width 22.0 meters, span 68 meters.
The road and navigation regulations required that the depth of the box girder be kept less than 1.65 meters over 2/3 of the span length, corresponding to a slenderness ratio of 1:41. Girder depth at the legs 4.05 meters, the legs are hidden in the retaining walls of the river banks.

Design.

References:

Leonhardt, F. and Bauer, R.: “Die Rosensteinbrücke über den Neckar in Stuttgart (The Rosenstein Bridge across the Neckar at Stuttgart),” Beton- und Stahlbetonbau 49 (1954), pp 49-57.

Mörsche, E.: Brücken aus Stahlbeton und Spannbeton, 6. Auflage, neu bearbeitet von F. Leonhardt (Bridges of Reinforced and Prestressed Concrete, 6th Edition by F. Leonhardt). Verlag Konrad Wittwer, Stuttgart 1958, pp 268-271.



	H31. General layout and construction sequence.


	H32. Bridge under construction.

MAIN RIVER BRIDGE, GEMÜNDEN
(1981-84)

Double-track railway bridge for 250 kilometers per hour speed railway. Total length subdivided into north and south approaches of 330.5 meters and 184 meters, built by incremental launching, and the main bridge with a length of 299 meters.
Main bridge with piers at 82-135-82 meters. In order to reduce the necessary depth of the box girder, V-shaped center piers are provided, with concrete hinges at the bottom.
Structure is a trapezoidal box girder with a maximum depth of 6.5 meters, built from the V-shaped piers symmetrically to the center of the main span and to the connecting pier by free cantilevering, using one auxiliary pier per side.

Consultant for aesthetics.

Final design and drawings for approaches and main bridge.

References:

Maak, H.: “Realisierungsstand im Südabachnitt der Neubaustrecke Hannover-Wurzburg (Current State of Construction of the Southern Part of the New Railway Line from Hannover to Wurzburg),” Eisenbahntechnische Rundschau 31 (1982), pp 823-837.

Leonhardt, F., Zellner, W. and Noack, P.: “Die Maintalbrücke bei Gemünden der Neubaustrecke Hannover-Wurzburg (The bridge across the Main-Valley at Gemünden on the New Railway Line from Hannover to Wurzburg),” Eisenbahntechnische Rundschau 32 (1983), pp 379-386.


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	The University of California, Berkeley Copyright 1997, The Regents of the University of California. Structural Engineering Slide Library, W. G. Godden, Editor Set H: Structures of Leonhardt, Andrä and Partners


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