The Beijing National Aquatics Center at night
|Full name||Beijing National Aquatics Center|
|Coordinates||39°59′30″N 116°23′03″E / 39.99167°N 116.38417°ECoordinates: 39°59′30″N 116°23′03″E / 39.99167°N 116.38417°E|
|Capacity||4,598 (17,000 during Olympics)|
|Construction cost||CNY940 million|
|Architect(s)||PTW Architects, CSCEC, CCDI, and Arup|
|Length||50 m (160 ft)|
|Width||25 m (82 ft)|
|Depth||3 m (9.8 ft)|
The Beijing National Aquatics Center (simplified Chinese: 北京国家游泳中心; traditional Chinese: 北京國家游泳中心; pinyin: Běijīng guójiā yóuyǒng zhōngxīn), officially known as the National Aquatics Center, and colloquially known as the Water Cube (Chinese: 水立方) and the Ice Cube (Chinese: 冰立方), is an aquatics center at the Olympic Green in Beijing, China.
The facility was originally constructed to host the aquatics competitions at the 2008 Summer Olympics and Paralympics. During the Olympics — where it hosted diving, swimming and synchronized swimming events — 25 world records were broken in swimming (although these were attributed primarily to controversial bodyskin swimwear that was widely adopted by competitors during the Beijing Olympics). In July 2010, a renovation of the facility was completed, which included the addition of a 12,000 m2 (130,000 sq ft) public water park.
In July 2003 the Water Cube design was chosen from 10 proposals in an international architectural competition for the aquatic center project. The Water Cube was specially designed and built by a consortium made up of PTW Architects (an Australian architecture firm), Arup international engineering group, CSCEC (China State Construction Engineering Corporation), and CCDI (China Construction Design International) of Shanghai. The Water Cubes design was initiated by a team effort: the Chinese partners felt a square was more symbolic to Chinese culture and its relationship to the Birds Nest stadium while the Sydney-based partners came up with the idea of covering the cube with bubbles, symbolizing water. Contextually, the Cube symbolizes Earth, while the circle (represented by the elliptic stadium) represents heaven, a common motif in ancient Chinese art.
Comprising a steel space frame, it is the largest ETFE-clad structure in the world with over 100,000 m² of ETFE pillows that are only 0.2 mm (1/125 of an inch) in total thickness. The ETFE cladding, supplied and installed by the firm Vector Foiltec, allows more light and heat penetration than traditional glass, resulting in a 30% decrease in energy costs. This choice was made in view of Beijings goal of presenting a fully green Olympic Games, with zero net growth in total carbon emissions. Likewise, the venue was also designed to capture and recycle 80% of the water falling on the roof or lost from the pools.
The outer wall is based on the Weaire–Phelan structure, a structure devised from the natural pattern of bubbles in soap lather. In the true Weaire–Phelan structure the edge of each cell is curved in order to maintain 109.5 degree angles at each vertex (satisfying Plateaus rules), but of course as a structural support system each beam was required to be straight so as to better resist axial compression. The complex Weaire–Phelan pattern was developed by slicing through bubbles in soap foam, resulting in more irregular, organic patterns than foam bubble structures proposed earlier by the scientist Kelvin. Using the Weaire–Phelan geometry, the Water Cubes exterior cladding is made of 4,000 ETFE bubbles, some as large as 9.14 meters (30 ft) across, with seven different sizes for the roof and 15 for the walls.
The structure had a capacity of 17,000 during the games. It also has a total land surface of 65,000 square meters and covers a total of 32,000 m2 (7.9 acres). Although called the Water Cube, the aquatic center is really a rectangular box (cuboid) 178 meters (584 ft) square and 31 meters (102 ft) high. The buildings popularity has spawned many copycat structures throughout China. For example, there is one-to-one copy of the facade near the ferry terminal in Macau – the Casino Oceanus by Paul Steelman.
Water Cube The National Aquatics Center in Chaoyang
2008 Summer Olympics
The Aquatics Center hosted the swimming, diving, and synchronized swimming events during the Olympics. Water polo was originally planned to be hosted in the venue but was moved to the Ying Tung Natatorium.
Many people believed the Water Cube to be the fastest Olympic pool in the world. Over the course of the Games, 25 world records were broken by athletes at the Water Cube, although all but two of them were achieved by swimmers wearing the controversial LZR Racer bodyskin (which led to restrictions on the use of such suits being implemented by FINA in 2010).
Post-Olympics usage and legacy
Video: The Beijing National Aquatics Center reopened on July 28, 2010.
After the Olympics, the Water Cube was opened to the public on select days of the week beginning in June 2009, and was also used as the site for a production of Swan Lake among other shows. On 19 October 2009, the Water Cube was closed to the public to begin a renovation of a portion of the complex into a water park, led by Canadian design firm Forrec, promising seven-story water slides and a wave machine, as well as attractions for the more land inclined such as shopping centers, cafes, and performance stages.
The facility officially reopened on 28 July 2010, with the water park opening on 8 August 2010 (the second anniversary of the Games opening). The renovation divided the facility into three pool areas (a main pool, Olympic demonstration pool, and a training pool), as well as the 12,000 m2 (130,000 sq ft) water park area.
In July 2013, the Water Cube introduced a new LED light show on its exterior, Nature and Man in Rhapsody of Light, by artist Jennifer Wen Ma and lighting designer Zheng Jiawei. Its colors are determined by trending use of emoji on Sina Weibo, which is in turn used to calculate the mood of the Chinese public 
In 2018, it was reported that the venue had achieved revenues of 124 million yuan (about $18 million USD), and has been breaking even for years.
2022 Winter Olympics
The Water Cube will host curling events during the 2022 Winter Olympics and Paralympics, a configuration nicknamed the Ice Cube. After Beijing was awarded the Games, work began on renovations to the facility to allow it to be converted to a curling rink, including the addition of ice-making equipment and other necessary climate control and monitoring systems.
It hosted its first event in this configuration, the China Junior Curling Open, in December 2019.
The special award for the most accomplished work in the section Atmosphere is awarded to the Australian architecture firm PTW Architects, CSCEC + Design and Arup for the project National Swimming Center, Beijing Olympic Green, China. The project demonstrates in a stunning way, how the deliberate morphing of molecular science, architecture, and phenomenology can create an airy and misty atmosphere for a personal experience of water leisure
— Quote from the Jury report of the Official Awards 9th International Architecture Exhibition – METAMORPH, Venice Biennale
- 2004: Venice Biennale – Award for most accomplished work Atmosphere section
- 2006: Popular Science Best of whats new 2006 in engineering
- 2008: NSW Project of the Year award from the Australian Institute of Project Management
- 2009: 40th annual MacRobert Award, the UKs biggest prize for engineering innovation
- 2010: International Association for Bridge and Structural Engineering 2010 Outstanding Structure Award
- Frei Otto
- Chris Bosse
- Rob Leslie-Carter
- Swimming at the 2008 Summer Olympics
- Swimming at the 2008 Summer Paralympics
- Curling at the 2022 Winter Olympics
- Wheelchair Curling at the 2022 Winter Paralympics
- Timothy Schreiber
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- ^ Casino Oceanus – The Unofficial Casino Oceanus Website from www.oceanus.asia Archived February 1, 2011, at the Wayback Machine
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- ^ Water Cube set to reopen soon with a big splash. China Daily. Retrieved January 31, 2020.
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- ^ Korosec, Kirsten. Chinas mood in real-time. ZDNet. Retrieved January 31, 2020.
- ^ 邹, 松霖 (2019). 水立方：世界场馆良性循环的优等生. China Economic Weekly 中国经济周刊.
- ^ Water Cube to be transformed for events on ice. China Daily. August 11, 2015. Retrieved January 31, 2020.
- ^ Water Cube to be frozen into Ice Cube for Beijing 2022 Winter Games. China Daily. Retrieved January 31, 2020.
- ^ Convertible curling rink for Beijing 2022 soon to be completed. Inside the Games. Retrieved January 31, 2020.
- ^ Yearender: Beijing 2022 organizers move focus from construction to operation. Xinhua. Retrieved January 31, 2020.
- ^ PTW Projects:Watercube-National Swimming Center. Archived from the original on August 19, 2006. Retrieved December 6, 2006.(page in Flash presentation)
- ^ Lee, Ellen. Water Cube scoops the pool at project management awards. Arup. Archived from the original on September 23, 2015. Retrieved August 5, 2015.
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