Cable Bridge
Coordinates: 46 ° 13 ′ 5 ″ N , 119 ° 6 ′ 17 ″ W.
| Cable Bridge | ||
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| Official name | Ed Hendler Bridge | |
| use | Road bridge | |
| Crossing of | Columbia River | |
| place | Pasco - Kennewick | |
| construction | Cable-stayed bridge | |
| overall length | 758 m | |
| width | 24.3 m | |
| Longest span | 299 m | |
| Clear height | 15 m | |
| completion | 1978 | |
| planner | Arvid Grant, Fritz Leonhardt | |
| location | ||
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The Cable Bridge (officially Ed Hendler Bridge ) is a road bridge over the Columbia River , which to the Tri-Cities belonging cities Pasco and Kennewick in the state of Washington joins, United States.
The 1978 opened cable-stayed bridge replaced the Pasco-Kennewick Bridge , built in 1922, a half-timbered - cantilever bridge that was demolished 1990th
The Cable Bridge was named after Ed Hendler, the former mayor of Pasco who died in 2001 and who campaigned for its construction. It is often referred to in the specialist literature as the Pasco Kennewick Bridge , without going into the older truss bridge.
description
The bridge has two directional lanes, each with two lanes and a sidewalk on both sides. It is 758.34 m long including the access ramps and crosses the river with a clearance height of 15 m.
The cable-stayed bridge with two H-shaped pylons and a cluster-shaped arrangement of the stay cables has a main opening with a span of 299.01 m and two secondary openings, each with a span of 123.9 m. On the northern bank of Pasco, the bridge ends in a 38.4 m long structure made of in-situ concrete that crosses a railroad track and the dike. At its abutment is the fixed point of the bridge deck, which is only suspended from the ropes. On the south side, the side opening is followed by three fields with 45.11 m each and one field with 37.8 m length.
The 24.33 m wide bridge deck consists of a 20 cm thick concrete slab in the area of the actual cable-stayed bridge, which is supported by triangular concrete hollow boxes arranged on the outside and cross girders at intervals of 2.51 m. In the area of the ramp bridges, an additional lower chord and two inner longitudinal girders formed a multi-cell hollow box. The bridge deck has a constant height of 2.13 m.
The 72.9 m high pylons with reinforced concrete stems that taper slightly towards the top are stiffened by a prestressed concrete cross brace just below their tips. A total of 144 stay cables, made from parallel wire bundles and anchored at 8.23 m intervals on the outer edges of the bridge deck, are attached to the pylon tops.
The bridge deck in the spanned area was built from prefabricated parts weighing 270 t, which had the full width of the deck and a length of 8.23 m corresponding to the spacing of the stay cables. The ramp bridges were built from in-situ concrete. A seal and a 5 cm thick asphalt road surface were applied to the concrete - contrary to the American custom of driving directly on the concrete.
history
In 1971, Arvid Grant, a local engineering firm, asked Fritz Leonhardt for advice on planning the bridge. Different variants of continuous girders and a cable-stayed bridge made of prestressed concrete were examined. In 1973, the client decided on the cable-stayed bridge because it had the fewest number of pillars in deep water and, due to its low construction height, the lowest roadway gradient. In addition, concrete was preferred because of the strong fluctuations in steel prices on the west coast of the USA and the lower maintenance costs, and aesthetic considerations spoke in favor of the cable-stayed bridge.
At the end of 1974, Holger Svensson , one of Fritz Leonhardt's employees, had completed the detailed implementation planning in accordance with American practice of only putting out completely planned structures to tender. Many calculations had to be done by hand, as the computer programs of the time were not that well developed.
This was followed by the tender and the award to Peter Kiewit Sons' Co., who built the bridge by September 1978. It was the first cable-stayed bridge in the USA and at that time the longest cable-stayed bridge with a concrete deck.
literature
- Fritz Leonhardt, Wilhelm Zellner, Holger Svensson: The prestressed concrete stay cable bridge over the Columbia River between Pasco and Kennewick in Washington State, USA. In: Concrete and reinforced concrete construction . 75th year, Verlag Wilhelm Ernst & Sohn, Berlin; February 1980, No. 2, pp. 29-36; March 1980, No. 3, pp. 64-70; April 1980, Issue 4, pp. 90-94, ISSN 0005-9900 .
Individual evidence
- ↑ Leonardo Fernández Troyano: Bridge Engineering. A global perspective. Colegio de Ingenieros de Caminos, Canales y Puentes, Thomas Telford 2003, ISBN 0-7277-3215-3 , p. 597
- ↑ René Walther, Bernard Houriet, Walmar Isler, Pierre Moïa: Cable- stayed bridges . Revised edition and translation, Verlag Bau + Technik / Beton-Verlag, Düsseldorf 1994, ISBN 3-7640-0328-6 , p. 54
- ^ Holger Svensson: Cable-stayed bridges. 40 years of experience worldwide . Ernst & Sohn, Weinheim 2011, ISBN 978-3-433-02977-0 , p. 447