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Who knows the structure and specific design of the Bird's Nest?
When the "Bird's Nest" truly stands between heaven and earth, the answer is self-evident. In architecture, the unique steel structure of the Bird's Nest is a great challenge. Because its east-west axis is 298 meters long, its north-south axis is 333 meters long, its highest point is 69 meters, and its lowest point is 40 meters. Most importantly, the whole steel structure is hyperboloid saddle-shaped, and the steel structure consists of 24 portal truss columns rotating around the bowl-shaped stand area of the stadium. All steel members need to support each other to form a grid frame. If the construction goes wrong, the construction of the whole stadium may fall short. The reason why the "Bird's Nest" is great is called a miracle in the history of human architecture, because such a great idea was finally realized by construction workers in China. In September last year, the steel frame supporting the outside of the Bird's Nest was successfully unloaded, which announced to the world that many difficult problems in the construction of the Bird's Nest had been solved by experts and construction workers in China.

884 "coat" for shelter from wind and rain.

From a distance, the "Bird's Nest" looks like a hollow stadium built with steel frames, and people can't help asking: Can it keep out the wind and rain? Once you approach the Bird's Nest, you will never have such doubts again, because the Bird's Nest is wearing a thin transparent coat with a thickness of only 0.25 mm, which not only protects the audience from the wind and rain, but also does not affect the grid effect of the Bird's Nest.

According to the staff, in the laying area of nearly 40,000 square meters, steel beams should be installed in each grid interwoven with steel frames, then steel cables should be installed, and finally ETFE films with the same material as the "Water Cube" should be fixed on the steel cables. The smallest area of these films is no more than 1 square meter, and the largest is about 250 square meters, with a total of 884 films.

You can keep out the snow in winter and the wind and shade in summer. The huge ceiling consisting of 884 pieces can cover all the spectators and hold up an "umbrella" for nearly 65,438+10,000 spectators in the stadium.

At the same time, this film can also play a sound-absorbing role for the huge stadium. More importantly, it is like a huge curtain, and the light can just shine through this "curtain" into the stadium without forming a chaotic shadow on the field and interfering with the work of the camera. The audience can also see the outside through the "curtains", and the shape of the steel structure is looming, which is really a wonderful enjoyment.

Tradition and modernity blend to show vitality.

The sky in Beijing in early spring is transparent, and the "Bird's Nest" shines brightly under the sunshine, showing the fashion and modern atmosphere everywhere. The gray mineral-like steel mesh is covered with transparent film material, and there is a bowl-shaped stadium stand in the red soil. Here, the hollowing technique, the lines of ceramics, the brilliance and enthusiasm of red in China traditional culture are perfectly integrated with the most advanced modern steel structure design.

The "Bird's Nest" is as high as 13 stories, and its "branches" are quite thick, among which 7 "branches" are landscape roads for people to walk on. The "Bird's Nest" has twelve small "wings", which is the gate for visitors to enter and leave in the future. But the whole bird's nest has no columns, and the stands are complete bowls without any shelter, like a huge container. This even and continuous ring gives the audience the best view, drives their excitement and inspires athletes to sprint faster, higher and stronger. Here, people are truly given a central position.

In order to reflect the open structural design of "Green Olympics" and "Bird's Nest", the stadium has a good natural ventilation environment, and athletes can play their competitive level in other competition venues without using air-conditioning equipment, so that the audience can watch the game better.

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"Bird's Nest" weekend "Sun Nest"

On April 18, the world-famous Bird's Nest, the main venue of the Beijing Olympic Games, will unveil half the mystery, and it will host the "Good Luck Beijing (Search)" competition. Although it is not completely open, it is the first time since it was built to undertake competitions and open to the curious world.

All security checks are accessible.

People who come to the "Bird's Nest" will be pleasantly surprised to find that this seemingly huge giant steel structure building will not give people a feeling of suddenly being high above. Along the gentle slope around the Bird's Nest, people can easily reach the big square where the stadium is located. Standing on this big square, you can see a panoramic view of the whole Olympic Park. There are 12 security entrances in the square, and the entrance to the stadium is completely barrier-free and flat.

The chair is full of fashion sense.

After entering the stadium from the gate, the red walls and the surrounding silver-gray metal steel beams in China are full of festive colors and fashion sense. Facing the 80,000 red and gray chairs installed in the bowl-shaped auditorium, it seems that people can only use "spectacular" to describe their inner feelings. These chairs, whose colors are "China Red" and "Great Wall Grey" respectively, are cross-mounted, forming a picture modeling with a gradual change from red to grey on the bowl-shaped stand. These chairs are designed into dynamic lines in the shape of water drops according to ergonomic principles, and they are very comfortable to sit on.

It embodies the "Bird's Nest" everywhere.

Walking into the "Bird's Nest", people will be surprised to find that many details here reflect the special shape and effect of the "Bird's Nest". Almost every floor has a ceiling lamp shaped like a bird's nest, and the aluminum grille on the top floor also echoes the appearance of the bird's nest. More eye-catching, the glass wall in the stadium is made of toughened glass called "Bird's Nest Red", which is pure China red with fine patterns and eye-catching shapes.

Sound absorbing board for walls

In the "press conference hall" located in the basement, the reporter saw that in addition to the conventional decoration, the ceiling and walls here are also hidden with "organs": for the effect of news release, the ceiling here is affixed with thermal insulation fiber sound-absorbing materials, and sound-absorbing boards are installed on the walls. In addition, the "Bird's Nest" also has a special glass room reception area. The glass in these reception areas is painted with black glass, in order to prevent the reflection of glass from affecting the shooting effect.

Cartoon logo is very cute.

In sharp contrast to the huge appearance of the "Bird's Nest", many signs here are very cartoon and lovely. Round head, slender figure, and two braids on his head-this sign printed at the door of the women's bathroom on each floor makes almost everyone passing by feel particularly lively and interesting. It is reported that these signs are specially designed for the "Bird's Nest". Chief reporter Tao Hui