February 6, 2018 -
5:15pm to 7:30pm


Greenland Group Suzhou Center

The 358m tall Greenland Group Suzhou Center tower is currently under construction in Wujiang, China. The mixed-use building program consists of office floors in the lower levels and a hotel above. The lower level office floor plan is barrel-shaped, while the hotel floor plan consists of two curved single-loaded hotel bars facing north and south. Differences in the optimal architectural lease depth and core size for these two different programs are addressed by eroding the middle third of the core in the hotel portions of the building. This forms an atrium which extends clear through the building from east to west façade, giving the tower its signature ‘eye of the needle’ form.  While adding an important architectural element and providing dramatic views out to the east and west, the atrium in this configuration resulted in the core being split in two, greatly reducing its structural stiffness. To address this, the two isolated building cores in the upper hotel floors are laced together using structural steel bracing to form a composite ‘coupled core’. The behavior of this unique ‘coupled-core’ structural solution under lateral and torsional loads and the analysis and detailing of the composite lacing connections will be discussed. 

Attendees will earn 1.0 hour of Continuing Education Credit. CE certificates will be emailed after the event.

Please register by Friday, February 2 to guarantee your place.  Registrations received after that time will be honored if possible, but cannot be guaranteed.


About the Speakers: 

Aaron Mazeika PE, SE, AIA, is an Associate Director and Senior Engineer with the Chicago office of Skidmore, Owings & Merrill LLP (SOM). With a focus on expressive integrated A&E design solutions, Aaron has led a structural design team responsible for over forty high rise towers around the world. His most prominent projects include the 412m tall sculpted Al Hamra Tower in Kuwait, the Poly Corporation headquarters in Beijing which features the world’s largest cable-net supported glass wall, and the 358m tall Greenland Suzhou Center. The team is currently working on their eighth supertall project, the 560m tall Greenland Pukou center in Nanjing, China.


Ashpica Chhabra PE, SE, is an Associate with the Chicago office of SOM. Over 10 years of working experience she has developed an expertise in the analysis and design of complex systems. Her past projects include the New San Bernardino Courthouse in California, the Chhatrapati Shivaji International Airport in Mumbai, and the Kula Belgrade Tower in Belgrade. Ashpica was the Project Engineer responsible for the design of the 358m tall Greenland Suzhou Tower.  



Cliff Dwellers Club
200 S. Michigan Ave, 22nd Floor
Chicago, IL


Cliff Dwellers Salad
Grilled Filet of Salmon


The registration fee is $45 for members, $65 for non-members. The evening begins with a cocktail hour at 5:15 pm. Dinner will be served at 6 pm, and the presentation will start shortly thereafter.  Please note that Cliff Dwellers' bar only accepts credit cards; cash is no longer accepted. 

Cancellation Policy:

If you make a reservation and cannot attend, please cancel by Friday, February 2.  If you do not cancel by that time, please send a colleague in your place, as you will be charged.



Edmund Schloss ( ARUP )
Andrius Valinskas ( Epstein )
David Nickell ( TGRWA, LLC )
Karolis Kozys ( Furhmann Engineering )
Tom Harrison ( Holabird & Root, LLC )
Daniel Morton ( Burns & McDonnell )
Derek Skolnik ( Kinemetrics, Inc. )
David Petlicki ( SP Engineers Ltd. )
Aaron Mazeika ( Skidmore, Owings & Merrill LLP )
Ashpica Chhabra ( Skidmore, Owings & Merrill LLP )