Cable-Stayed With Steel Deck Cont

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

RHINE BRIDGE, MANNHEIM-LUDWIGSHAFEN
(1968-72)

Four-lane highway and two-track streetcar bridge, normal width 36.9 meters, enlarged for six lanes to 51.9 meters at the Ludwigshafen embankment pier.
Due to local conditions, unsymmetric one-sided configuration. Main span 287 meters in steel, side spans 60.16-65.00 meters of concrete on the Mannheim embankment in order to provide necessary counter-weight. Steel and concrete section formed of two 7.8 x 4.5 box girders that are rigidly joined at the tower.
A-shape steel tower with a height of 71.5 meters above deck, standing on neopot hinge bearings.
Parallel-wire cables with corrosion protection of polyurethane and chromates of zinc.
Erection by free cantilevering, partly using a secondary stay system.

H47. Erection.

H48. Overall aerial view.

H49. Detail of tower.

Preliminary design, tender design and tender documents, checking of final calculations and drawings.

Ref: Volke, E., and Rademacher, C. -H.: “Die Strombrücke im Zuge der Nordbrücke Mannheim-Ludwigshafen (Kurt-Schumacher-Brücke) (The Main Bridge of the North Bridge Mannheim-Ludwigshafen, Kurt-Schumacher-Bridge),” Der Stahlbau 42 (1973), pp 97-105, 138-152 and 161-172.

ZÁRATE-BRAZO LARGO BRIDGES ACROSS RIVER PARANÁ, ARGENTINA
(1972-77)


	Two identical bridges with a main span of 330 meters and side spans of 110 meters for a four-lane highway and eccentrically placed railway. Bridges 53 meters above water. For aerodynamic reasons, the cross-section consists of two trapezoidal edge box girders and an orthotropic plate in between. the first large bridge with shop-fabricated parallel-wire cables with HiAm-anchorages, protected against corrosion by PE-ducts and cement grout. Concrete towers 68 meters above bridge deck. Transfer of braking force to both towers by means of hydraulic dampers. Foundations with large diameter bore-piles in depths up to 70 meters.

Extensive model testing - among others, static and dynamic tests on a 16.5-meter long model of the entire bridge in Bergamo, Italy (1:33 1/3 scale).

Design (in collaboration)
Technical direction of the erection of the superstructure.

Ref: Leonhardt, F., Zellner, W., and Saul, R.:

“Zwei Schrägkabelbrücken für Eisenbahn- und Strassenverkehr über den Rio Paraná (Two Cable-Stayed Bridges for Railway and Highway Traffic across the Paraná River, Argentina),” Der Stahlbau 48 (1979), pp 225-236, 272-277.
“Die Betonpylonen und Unterbauten der Schrägkabelbrucken Zárate-Brazo Largo über den Rio Paraná, Argentinien (The Concrete Towers and Foundations of the Cable-Stayed Bridges Zàrate-Brazo Largo across the Paraná River, Argentina),” Bauingenieur 55 (1980), pp 1-10.
Modellversuche für die Schrägkabelbrücken Zárate-Brazo Largo über den Rio Paraná, Argentinien (Model Tests for the Cable-Stayed Bridges Zàrate-Brazo Largo across the Paraná River, Argentina),” Bauingenieur 54 (1979), pp 321-327.


	H50. Erection: Free cantilevering erection, symmetrically from the towers outward to the anchorage pier and to the bridge center.


	H51. Cable erection: Cable erection without catwalks, but with auxiliary cableways. The cables are stressed at the bridge deck level with center hole jacks.


	H52. Overall view of finished bridge across Paraná Guazú River.



		H53. Artist’s rendering of the design proposal.

RHINE RIVER BRIDGE, DÜSSELDORF-FLEHE
(1961)

Six-lane highway bridge, total width 41 meters.
One tower only, therefore unsymmetric one-handed arrangement of cables with spans of 367.25 and 13 x 60 meters.
Main span of steel, consisting of edge girders and orthotropic plate. Side spans of prestressed concrete, formed by two trapezoidal box girders.
A-shaped tower of concrete, height of bridge deck above water 20 meters, height of tower above bridge deck 140 meters.

Proposal for the design and construction competition, not accepted.
Final design of side spans.

References:

Leonhardt, F. and Zellner, W.: “Cable-Stayed Bridges,” IABSE Surveys S-13/80, p. 31.

Zellner, W. and Schmidts, P.: “Rheinbrücke Düsseldorf-Flehe, Spannbeton-Vorlandbrücke (Rhine Bridge Düsseldorf-Flehe, Prestressed Concrete Side Spans),” Der Bauingenieur 54 (1979), pp 85-93.



		H54. Artist’s rendering.

MESSINA STRAITS CROSSING, ITALY
(1969-70)

Six-lane highway and double-track railway bridge with spans of 150-170-1750-750-150 meters.
Aerodynamically-shaped bridge deck with total width of 48 meters, center box girder 10 meters wide, 8 meters deep.
Bridge deck 70 meters above water, A-shaped concrete towers 350 meters above deck, box columns 10 x 8 to 35 x 10 meters.
Parallel wire cables with HiAm-anchorage and corrosion protection by PE-pipes and cement grout, stiffened by diagonal ropes.
Foundations in 95-meter deep water with caissons of 94-meter diameter, floated into position and fixed to the ground by rock anchors.
Fenders against ship impact.
Design for earthquake, high speed currents and ship impact.

Competitive design of Gruppo Lambertini, first prize winner in international competition.

References:

Leonhardt, F. and Zellner, W.: “Vergleiche zwischen Hängebrücken und Schrägkabelbrücken für Spannweiten über 600 meters (Comparative Investigations between Suspension Bridges and Cable-Stayed Bridges for Spans Exceeding 600 meters),” IABSE Publications, Volume 32-I, pp 127-165.

Leonhardt, F., Andrä, W. and Zellner, W.: “Entwickling won weitgespannten Schrägkabelbrücken (Development of Long Span Cable-Stayed Bridges).” In Beyer, E. and Lange, K.: Verkehrsbauten (Structures for Traffic). Düsseldorf, Betonverlag, 1974, pp 153-219.

Leonhardt, F. and Zellner, W.: “Cable-Stayed Bridges,” IABSE Surveys S-13/80.


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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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