CBD Towers

CHANGYUAN, HENAN PROVINCE, CHINA, 2013

The CBD Twin Tower Project is situated in Changyuan County, Xinxiang City, Henan Province and part of the Changyuan Masterplan developed by Urban Systems Office, London. The CBD twin tower project, located in a high seismic zone, consists of 4 levels of 'plinth' which blend into tow towers, 225m and 138m. The towers are connected by a bridge on levels 19-21. The building features offices, hotel and serviced apartments, served by restaurants, conference facilities, health and fitness centre and retail.

Nous' London office coordinated geometry closely with a London-based architect, while analysis of the towers in the high seismic zone was performed by the Los Angeles office.

  • KEY FEATURES
  • Irregular External Moment Frame with Concrete Core
  • Stepped concrete core to relieve drift
  • Void slabs to relieve seismic mass and foundation loading
  • Bridge at level 17 connecting the two towers
  • AWARDS
  • “This innovative design for a large mixed-use commercial project is conceived using specially developed digital tools, aimed at creating a unique three-dimensional architectural landscape that stimulates the overlap and synergy between different activities or user groups in the building.”

  • Client | Private
  • Location | Changyuan, Henan Porvince, China
  • Architect | Urban Systems Office, LLP
  • Staff Leads | Manja Van De Worp, London
    Elizabeth Mahlow, Los Angeles
    Omar Garza, Los Angeles
  • Duration | 2014, 2016
  • Size | 290,000 M2

The 3d structural grid is a series of transfers responding the spatially performative program.

The project is developed up to a detailed design stage using an advanced digital design workflow, connecting our digital design process (in RHINO / Grasshopper) directly to the Building Information Modeling (BIM) software used for communicating with collaborators and producing drawing sets. The process allowed for the integration of detailed environmental performance goals as well as specific structural design data developed in collaboration with NOUS Engineering (London/LA)”.

The structural grid of the towers is based on a ‘pixel logic’ for defining volume, structure and space - most of the buildings' core elements will snap to this 3d grid. The 3D grid is based on spatially performative considerations. In the plinth there are voids for circulation and light which manifest as ‘canyon areas’ throughout the plinth and in several places extend up to cut some of the tower floor plates.

The building features offices, hotel and serviced apartments, served by restaurants, conference facilities and retail.

An irregular concrete moment frame wraps the perimeter of the towers with the vertical and horizontal layout of beams and columns arranged to reflect the different programs within the building. The discontinuous moment frame creates a direct link between program, structure and environmental conditions. Based on the architect’s rules of subdivision by program, densities of structural framing were generated incorporating gravity and seismic loading revealing the structural impacts on performance of the transfer and density of the perimeter moment frame.

  • Client | Private
  • Location | Changyuan, Henan Porvince, China
  • Architect | Urban Systems Office, LLP
  • Staff Leads | Manja Van De Warp, Elizabeth Mahlow, Omar Garza
  • Duration | 2014, 2016
  • Size | 290,000 M2