viernes, 28 de enero de 2011

Beijing National Stadium

Beijing National Stadium, also known officially as the National Stadium, or colloquially as the Bird's Nest (鸟巢), is a stadium in Beijing, China. The stadium was designed for use throughout the 2008 Summer Olympics and Paralympics.


History
Located in the Olympic Green, the stadium cost US$423 million. The design was awarded to a submission from the Swiss architecture firm Herzog & de Meuron in April 2003 after a bidding process that included 13 final submissions. The design, which originated from the study of Chinese ceramics, implemented steel beams in order to hide supports for the retractable roof; giving the stadium the appearance of a "Bird's nest". Leading Chinese artist Ai Weiwei was the artistic consultant on the project. The retractable roof was later removed from the design after inspiring the stadium's most recognizable aspect. Ground was broken in 8 December 2003 and the stadium officially opened in 28 June 2008. A shopping mall and a hotel are planned to be constructed to increase use of the stadium, which has had trouble attracting events, football and otherwise, after the Olympics.

Bidding
In 2001, before Beijing had been awarded the right to host the 2008 Summer Olympics, the city held a bidding process to select the best arena design. Multiple requirements including the ability for post-Olympics use, a retractable roof, and low maintenance costs, were required of each design. The entry list was narrowed to thirteen final designs.Of the final thirteen, Li Xinggang of China Architecture Design and Research Group (CADG), said after he placed the model of the "nest" proposal at the exhibition hall and saw the rival entries he thought to himself, "We will win this." The model was approved by as the top design by a professional panel; however, it was later exhibited for the public. Once again, it was selected as the top design. The "nest scheme" design became official in April 2003.

Design and construction
Beijing National Stadium (BNS) was a joint venture among architects Jacques Herzog and Pierre de Meuron of Herzog & de Meuron, project architect Stefan Marbach, artist Ai Weiwei, and CADG which was lead by chief architect Li Xinggang. During their first meeting in 2003, at Basel, the group decided to do something unlike Herzog and de Meuron had traditionally designed. "China wanted to have something new for this very important stadium," Li stated. In an effort to design a stadium that was "porous" while also being "a collective building, a public vessel", the team studied Chinese ceramics. This line of thought brought the team to the "nest scheme". The stadium consists of two independent structures, standing 50 feet apart: a red concrete seating bowl and the outer steel frame around it.

Under construction in September 2007

In an attempt to hide steel supports for the retractable roof, required in the bidding process, the team developed the "seemingly random additional steel" to blend the supports into the rest of the stadium. Twenty-four trussed columns encase the inner bowl, each one weighing 1,000 tons. Despite random appearance, each half of the stadium is nearly identical.[12] After a collapse of a roof at the Charles de Gaulle International Airport, Beijing reviewed all major projects. It was decided to eliminate the retractable roof, the original inspiration for the "nest" design,[6] as well as 9,000 seats from the design. The removal of the elements helped to bring the project under the reduced construction budget of $290 million, from an original $500 million. With the removal of the retractable roof, the building was lightened, which helped it stand up to seismic activity; however, the upper section of the roof was altered to protect fans from weather. Due to the stadium's outward appearance, it was nicknamed "The Bird's Nest". The phrase was first used by Herzog & de Meuron, though the pair still believes "there should be many ways of perceiving a building." The use is a compliment Li explained, "In China, a bird's nest is very expensive, something you eat on special occasions."
Ground was broken, at the Olympic Green, for Beijing National Stadium on 8 December 2003. At its height, 17,000 construction workers worked on the stadium. In 1 January 2008, The Times reported that 10 workers had died throughout construction; despite denial from the Chinese government. However, in a story the following week, Reuters, with the support of the Chinese government, reported that only two workers had died. All 110,000 tons of steel were made in China. On 14 May 2008 the grass field of 7,811 square meters was laid in 24 hours. The field is a modular turf system by GreenTech ITM. Beijing National Stadium officially opened at a ceremony on 28 June 2008.

Architectural detail of the stadium's exterior

Features and events
The eastern and western stands of Beijing National Stadium are higher than northern and southern stands, in order to improve sightlines. A 24-hour per day rainwater collector is located near the stadium; after water is purified, it is used throughout and around the stadium. Pipes placed under the playing surface gather heat in the winter to warm the stadium and coldness in the summer to cool the stadium. The stadium's design originally called for a capacity of 100,000 people; however 9,000 were removed during a simplification of the design. The new total of 91,000 would be shaved further when 11,000 temporary seats were removed after the 2008 Olympics; bringing the stadium's capacity to 80,000. The farthest seat is 460 feet (140 metres) from center field. Temperature and airflow of every surface were optimized to increase ventilation.
Beijing National Stadium hosted the Opening and Closing Ceremonies, athletic events, and football final of the 2008 Summer Olympics from 8 August to 24 August 2008. The stadium also hosted the Opening and Closing ceremonies and athletic events of the 2008 Summer Paralympics from 6 September to 17 September 2008. Though designed for track & field events of the Olympics, the stadium will continue to host sporting events, such as football, afterwards. A shopping mall and a hotel, with rooms overlooking the field, are planned to help increase use after the Olympics. Li stated, "This will become the most important public space in Beijing.

The Beijing National Stadium at night during the Summer Olympics

Post-Olympics
The stadium has not found significant use since the Olympics. As of 9 February 2009 only two events are scheduled, both on 8 August 2009 the one-year anniversary of the stadium's opening. One is a performance of the opera Turandot. The other is the 2009 Supercoppa Italiana (Italian Super Cup) final, the traditional curtain raiser to the Italian football league season. The Beijing Guo'an football club was scheduled to play at the stadium, but later backed out of their agreement, citing the embarrassment of using an 80,000+ seat venue for games that routinely draw only slightly more than 10,000.
On 12 January 2009 the venue's owners announced the stadium would be turned into a shopping and entertainment complex in three to five years. The venue costs approximately $9 million to maintain per year. Due to a lack of use, paint is already peeling in some areas; plans call for the $450 million stadium to anchor a complex of shops and entertainment outlets in three to five years is being developed by operator Citic Group. The company will also continue to develop tourism as a major draw for the stadium, while seeking sports and entertainment events.
The stadium hosted the 2009 Race of Champions. The stadium will host a Bledisloe Cup match in the next few years, after Hong Kong hosted a match in 2008 and Tokyo in 2009. In addition, there have been rumors of ongoing talks for a street race around the National Stadium and the Olympic Green for the A1 Grand Prix series as early as the next seven years.
In July 2010, the stadium hosted a friendly football match between Premier League team Birmingham City and Chinese side Beijing Guoan as a part of Birmingham's pre-season trip to China, the homeland of the clubs owner Carson Yeung. Birmingham City recorded a 1-0 victory in the game.
In spite of the lack of significant events, the stadium appears to be quite profitable, drawing some 20,000 to 30,000 people a day at the price of a 50 yuan admission. Recently it has been used as a snow theme park.
On 1 November 2010 the IAAF announced that the 2015 World Championships in Athletics will take place at the Beijing National Stadium

Inside of the stadium during the 2008 Summer Olympics

YOSEPH BUITRAGO C.I. 18257871 CRF

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