Cable Bridge
46.218178 - 119.104671Koordinaten: 46 ° 13 ' 5.4 "N, 119 ° 6' 16.8 " W
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The Cable Bridge ( officially Ed Hendler Bridge ) is a road bridge over the Columbia River, which connects belonging to the Tri -Cities Cities Pasco and Kennewick, Washington, United States.
The cable-stayed bridge opened in 1978, replaced the Pasco - Kennewick Bridge, built in 1922 a truss cantilever bridge, which was demolished in 1990.
The Cable Bridge was named after Ed Hendler, the late 2001 former mayor of Pasco, who had used for their construction. It is frequently referred to in the literature as Pasco Kennewick Bridge, without going into the older truss bridge.
Description
The bridge has two carriageways, each with two lanes and a sidewalk on both sides. It is including access ramps total of 758.34 m long and crosses the river with a clear height of 15 m.
Has the cable-stayed bridge with two H-shaped pylons and tuft -shaped arrangement of the stay cables a main opening with a wingspan of 299.01 m and two side openings each with 123.9 m span. On the northern bank of the Pasco bridge ending in a 38.4 m long in-situ concrete building that crosses a railroad track and the road on the bank. At its abutment is the fixed point of the suspended only on the ropes passing through bridge decks. On the south side close to the side opening even at three fields, each with 45,11 m and a field with 37.8 m length.
The 24.33 m wide bridge deck consists in the actual cable-stayed bridge of a 20 cm thick concrete slab, which is supported by externally disposed triangular concrete box girders and at intervals of 2.51 m by cross beams. In the area of the ramp bridges a multi-cell box girder was formed by an additional bottom chord and two inner side rails. The bridge deck has a constant height of 2.13 m.
The 72.9 m high pylons with upwardly slightly tapered reinforced concrete stems are nearly stiffened by a prestressed concrete cross brace below their peaks. At the pylon tops the total of 144 stay cables are attached, which were made of parallel wire bundles and are anchored at intervals of 8.23 m at the outer edges of the bridge deck.
The bridge deck was built in the spanned range from 270 t heavy prefabricated parts, which had the full width of the deck and a length of 8.23 m corresponding to the distances of the stay cables. The ramp bridges were built in-situ concrete. On the concrete a seal and a 5 cm thick asphalt pavement was applied - contrary to the American tradition to go directly to the concrete.
History
Arvid Grant, a local engineering firm, had asked Fritz Leonhardt 1971 for advice in planning the bridge. We examined different variants of continuous beams and a cable-stayed bridge made of prestressed concrete. The client chose 1973 for a cable-stayed bridge, as they had the lowest number of piers in deep water and because of its low height the slightest incline of the roadways. In addition, concrete was preferred because of the time on the west coast of the United States strongly fluctuating steel prices and reduced maintenance costs and aesthetic considerations spoke for the cable-stayed bridge.
The end of 1974 had Holger Svensson, an employee of Fritz Leonhardt, the detailed implementation planning completed according to the American practice, write out only completely planned buildings. However, many hand calculations had to be done, since the former computer programs were not as well developed.
It was followed by the tendering and contract award to Peter Kiewit Sons ' Co., which built the bridge to September 1978. She was the first cable-stayed bridge in the U.S. and at that time the longest cable-stayed bridge with a concrete deck.