The growing city of Brazilia needed the third bridge on the lake, which separated half of its inhabitants from their jobs. In response to the competition, the architect Alexandre Chan and the structural engineer Mario Vila Verde, both of Rio de Janeiro, produced the concept of victory: courage, dancing a change in ancient structural form. Starting in 1957, Brazilia was built in the sparsely populated area of the country’s interior. The new, completely modern city was in the power of the works of the architect Oscar Niemeyer, which is respected all over the world for its increase in the increase, bending concrete. Four decades after his birth, Brazilia surpassed expectations of her development. The city of approximately 2 million inhabitants began to spread. Two existing bridges on the lake could no longer adapt heavy movement. According to the channel, the idea was to create a guideline for the pleasure of the community as much as just crossing a mass of water. He used structural restrictions as a means of not restraint, but expressions. The JK bridge also becomes a respected example of cooperation between architecture and development. Three large arches dominate the performance, and each crosses the Midspan highway to land on the opposite side of the highway. A radial cable stay between the highway and the lower side of each arch forms a kind of tunnel for travelers. The road itself is three lanes in each direction, with the sidewalk on each side. The architect explains his structural approach: “To explore the pure image ‘smaller more’ and reduce the funds in poor soil… [we assumed] not four supports for each arch, but only two. Thus, each arch will cross the road in diagonal jumps, adding even more emotions and tension to the sculpture of the structure.”The total number of the bridge is 4000 feet (1200 meters) in length, with each steel arch covering 800 feet (240 meters). The 80-foot highway (24 meters wide) bends subtly, to the radius of 10,300 feet (3,150 meters). Below, there is a 60-foot (18-meter) resolution, allowing a small craft to go under. Arches reach a height of 200 feet 60 meters above the water level. There are 16 stays for each arch, made intervals between every 65 feet (20 meters) along the deck and every 60 feet (18 meters) along the lower face of the arch. Their tendency gives a 15-foot (4. 5-meter) permission for vehicles. The stay is made of the shores of galvanized steel, a protected wax coat and scabbols of highly densely polyethylene (HDPE). The lower anchor point of each stay is installed, while the upper tuned, allowing to correct the tension. A new symbol for the city, in addition to performing its intended work on transporting the inhabitants of the suburban zone, the bridge has become a visual image for a community electrically lit at night and reflecting sunlight during the day. Performances and from this became like tourists and manufacturers postcards, and this is one of the first constructed landmarks visible to those who arrive by air. In 1998, when the project of the bridge was selected by the competition, the jury commented: “The intermittent project of arches brings, in a new way and using bold technology, almost a poetic component in both user scales, those who go under them or those who look at them from a large distances.
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