Adrian Smith + Gordon Gill Architecture unveiled the design for Dancing Dragons, a pair of supertall mixed-use towers for the new Yongsan International Business District in Seoul, South Korea. The buildings, which include residential, “officetel” and retail elements, consist of slender, sharply angled mini-towers cantilevered around a central core. The design aesthetic is contemporary yet informed by aspects of traditional Korean culture.
The mini-towers feature a series of diagonal massing cuts that create living spaces that float beyond the structure. This recalls the eaves of traditional Korean temples—a design theme echoed both in the geometry of the building skin and the jutting canopies at the towers’ base. The theme is extended in the building skin, which suggests the scales of Korean mythical dragons, which seem to dance around the core—hence the project’s name. (Yongsan, the name of the overall development, means “Dragon Hill” in Korean.)
Towers 1 and 2—about 450 meters and 390 meters tall, respectively—share an architectural language and, therefore, a close family resemblance, but are not identical. In the taller structure, the 88-level Tower 1, the massing cuts at the top and bottom of the mini-towers are V-shaped. In the 77-level Tower 2, the cuts move diagonally in a single unbroken line; they are also arranged in a radial pattern around the core that is perceptible as viewers move around the tower.
In both buildings, the mini-tower cuts are clad in glass at the top and bottom, making for dramatic skylights above the units at the highest levels and a transparent floor beneath the units at the lowest levels. This offers the opportunity for special high-value penthouse duplex units with spectacular 360-degree views of downtown Seoul and the adjacent Han River, along with an abundance of natural light.
AS+GG partner Robert Forest, AIA, notes that Dancing Dragons represents AS+GG’s second major project in downtown Seoul. The other is the Head Office of the Federation of Korean Industries, an innovative and highly sustainable office building now under construction and scheduled to be completed next year.
The design team also includes PositivEnergy Practice, a Chicago-based engineering and energy consulting firm that is designing a series of innovative building systems for the project. Sustainable features of the building system design include triple-glazed window units, which minimize heat loss; an overlapping exterior wall system, which creates a self-shading effect; and natural ventilation in all units through operable mullions. Other systems include radiant heating; fuel-cell cogeneration units at the basement level; photovoltaic arrays on the roof surfaces; daylight-linked lighting controls; and heat recovery via electric centrifugal chillers.
The structural scheme for Dancing Dragons, developed by AS+GG in collaboration with the international structural engineering firm Werner Sobek, features eight mega-columns that traverse the vertical length of both cores. The mini-towers are hung off the cruciform cores in a balanced fashion by means of a belt truss system, stabilizing the structure.
The design of the 23,000-square-meter site—part of the larger Yongsan master plan —reinforces the angular geometry of the building massing and skin. Landscape features, designed in collaboration with Martha Schwartz Partners, include sloped berms that echo that geometry. The site also includes a retail podium with a crystalline sculptural form and sunken garden that provide access to a large below-grade retail complex. +
Related Stories
| Nov 16, 2010
Architecture Billings Index: inquiries for new projects remain extremely high
The new projects inquiry index was 61.7, down slightly from a nearly three-year high mark of 62.3 in September, according to the Architecture Billings Index (ABI). However, the ABI dropped nearly two points in October; the October ABI score was 48.7, down from a reading of 50.4 the previous month. The ABI reflects the approximate nine to 12 month lag time between architecture billings and construction spending.
| Nov 16, 2010
Brazil Olympics spurring green construction
Brazil's green building industry will expand in the coming years, spurred by construction of low-impact venues being built for the 2016 Olympics. The International Olympic Committee requires arenas built for the 2016 games in Rio de Janeiro meet international standards for low-carbon emissions and energy efficiency. This has boosted local interest in developing real estate with lower environmental impact than existing buildings. The timing couldn’t be better: the Brazilian government is just beginning its long-term infrastructure expansion program.
| Nov 16, 2010
Green building market grows 50% in two years; Green Outlook 2011 report
The U.S. green building market is up 50% from 2008 to 2010—from $42 billion to $55 billion-$71 billion, according to McGraw-Hill Construction's Green Outlook 2011: Green Trends Driving Growth report. Today, a third of all new nonresidential construction is green; in five years, nonresidential green building activity is expected to triple, representing $120 billion to $145 billion in new construction.
| Nov 16, 2010
Calculating office building performance? Yep, there’s an app for that
123 Zero build is a free tool for calculating the performance of a market-ready carbon-neutral office building design. The app estimates the discounted payback for constructing a zero emissions office building in any U.S. location, including the investment needed for photovoltaics to offset annual carbon emissions, payback calculations, estimated first costs for a highly energy efficient building, photovoltaic costs, discount rates, and user-specified fuel escalation rates.
| Nov 16, 2010
CityCenter’s new Harmon Hotel targeted for demolition
MGM Resorts officials want to demolish the unopened 27-story Harmon Hotel—one of the main components of its brand new $8.5 billion CityCenter development in Las Vegas. In 2008, inspectors found structural work on the Harmon didn’t match building plans submitted to the county, with construction issues focused on improperly placed steel reinforcing bar. In January 2009, MGM scrapped the building’s 200 condo units on the upper floors and stopped the tower at 27 stories, focusing on the Harmon having just 400 hotel rooms. With the Lord Norman Foster-designed building mired in litigation, construction has since been halted on the interior, and the blue-glass tower is essentially a 27-story empty shell.
| Nov 16, 2010
Where can your firm beat the recession? Try any of these 10 places
Wondering where condos and rental apartments will be needed? Where companies are looking to rent office space? Where people will need hotel rooms, retail stores, and restaurants? Newsweek compiled a list of the 10 American cities best situated for economic recovery. The cities fall into three basic groups: Texas, the New Silicon Valleys, and the Heartland Honeys. Welcome to the recovery.
| Nov 16, 2010
Landscape architecture challenges Andrés Duany’s Congress for New Urbanism
Andrés Duany, founder of the Congress for the New Urbanism, adopted the ideas, vision, and values of the early 20th Century landscape architects/planners John Nolen and Frederick Law Olmsted, Jr., to launch a movement that led to more than 300 new towns, regional plans, and community revitalization project commissions for his firm. However, now that there’s a societal buyer’s remorse about New Urbanism, Duany is coming up against a movement that sees landscape architecture—not architecture—as the design medium more capable of organizing the city and enhancing the urban experience.
| Nov 16, 2010
Just for fun: Words that architects use
If you regularly use such words as juxtaposition, folly, truncated, and articulation, you may be an architect. Architects tend to use words rarely uttered during normal conversations. In fact, 62% of all the words that come out of an architects mouth could be replaced by a simpler and more widely known word, according to this “report.” Review this list of designer words, and once you manage to work them into daily conversation, you’re on your way to becoming a bonafide architect.
| Nov 16, 2010
NFRC approves technical procedures for attachment product ratings
The NFRC Board of Directors has approved technical procedures for the development of U-factor, solar heat gain coefficient (SHGC), and visible transmittance (VT) ratings for co-planar interior and exterior attachment products. The new procedures, approved by unanimous voice vote last week at NFRC’s Fall Membership Meeting in San Francisco, will add co-planar attachments such as blinds and shades to the group’s existing portfolio of windows, doors, skylights, curtain walls, and window film.
