The Skidmore Owings & Merrill LLP (SOM)-designed Zhengzhou Greenland Plaza has opened its doors to its office users. The circular 60-story tower takes its place as the tallest building in the central Chinese city. Located in the northeast portion of Zhengzhou, the 919-feet tower’s circular form is a response to the surrounding development’s shape that centers on a manmade lake.
The 2.59-million-square-feet building houses a mixed-use program of offices on its lower floors and a 416-room hotel above. Daylighting was a key driver of the building’s design. Three- to five-story-tall light-gauge painted aluminum screens are configured at an outward cant that enhances interior daylighting through scientifically calculated reflections while protecting the all-glass exterior from solar gain. The screens provide multiple performance and aesthetic-related roles. The same outward cant that aids daylighting allows for a nuanced approach to artificial lighting, providing outboard locations for dramatic nighttime lighting of the building that make the tower a beacon. The screens are located between one and two-meters from the building’s curtain wall—allowing window washing to occur behind the screens. Their visual porosity varies depending on a viewer’s location. When close to the building’s base, the tower appears to be primarily metal; from a distance, the panels are more open and the building’s glass nature is revealed. The rhythmic cant of the screens, combined with their decreasing size as they rise on the building, creates a dynamic movement that gives the building a fine-grained texture that relates to the building’s humanistic aspirations.
The form of the tower tapers slightly as it rises. “We conceived the building as a classical column,” SOM Design Director Ross Wimer says. “Its iconic image comes from this timeless form—adapted with cutting-edge, 21st century technologies to create a building that expresses our time.” These innovations include a heliostat that crowns the building and reflects daylight throughout the hotel atrium. “Like the solar screening, the heliostat is a scientifically-derived element that enhances the experience of daylight for the building’s users,” Wimer says. The device allows daylight to be reflected and focused into the atrium whose surfaces are finished to help drive light deep into the space. Computer-controlled dimmer switches modulate the light level-based on the illumination provided by the reflector, enabling the atrium to consume less energy and generate less heat throughout the year.
Wimer notes that, while not unheard of, circular skyscrapers remain somewhat unusual. Among the best known examples are Bertrand Goldberg’s Marina City in Chicago, Sir Norman Foster’s 30 St. Mary Axe in London, Jean Nouvel’s Torre Agbar in Barcelona, and Adolf Loos’ unbuilt scheme for the Chicago Tribune Tower. +
Related Stories
Mass Timber | Jun 2, 2022
Brooklyn is home to New York City’s first mass timber condo building
In the Brooklyn neighborhood of Park Slope, the newly completed Timber House is New York City’s first mass timber condominium building and its largest mass timber project (by height and square footage).
Codes and Standards | Jun 1, 2022
HKS, U. of Texas Dallas partner on brain health study
HKS and The University of Texas at Dallas’ Center for BrainHealth are conducting a six-month study to improve the way the firm’s employees work, collaborate, and innovate, both individually and as an organization, according to a news release.
Building Team | Jun 1, 2022
Pennsylvania’s Longwood Gardens to get a $250 million transformation
Longwood Gardens, a botanical garden with about 1,100 acres in Pennsylvania’s Brandywine Valley, recently announced plans to transform its core area of conservatory gardens.
Mass Timber | May 31, 2022
Tall mass timber buildings number 139 worldwide
An audit of tall mass timber buildings turned up 139 such structures around the world either complete, under construction, or proposed.
Hotel Facilities | May 31, 2022
Checking out: Tips for converting hotels to housing
Many building owners are considering repositioning their hotels into another property type, such as senior living communities and rental apartments. Here's advice for getting started.
Museums | May 31, 2022
University of Texas at Dallas breaks ground on new 12-acre cultural district
The University of Texas at Dallas (UT Dallas) recently broke ground on the Crow Museum of Asian Art, the first phase of a new 12-acre cultural district on campus.
BAS and Security | May 26, 2022
Can your intelligent building outsmart hackers?
ESD's security services studio leader Coleman Wolf offers tips, advice, and lessons for protecting real estate assets from cyberattacks.
Sports and Recreational Facilities | May 26, 2022
WNBA practice facility will offer training opportunities for female athletes and youth
The Seattle Storm’s Center for Basketball Performance will feature amenities for community youth, including basketball courts, a nutrition center, and strength and conditioning training spaces.
Multifamily Housing | May 25, 2022
9 noteworthy multifamily developments to debut in 2022
A 1980s-era shopping mall turned mixed-use housing and a mid-rise multifamily tower with unusual rowhomes highlight the innovative multifamily developments to debut recently.
Coronavirus | May 20, 2022
Center for Green Schools says U.S. schools need more support to fight COVID-19
The Center for Green Schools at the U.S. Green Building Council released a new report detailing how school districts around the country have managed air quality within their buildings during the second year of the COVID-19 pandemic.
