Structural design of Beijing Hanwei Building
Location of the Project: north to World Trade Center of Chaoyang District, Beijing
Time of design: April ~ August 1995
Date of completion: 1997
Major designers: Xu Lin, Zhang Shitong, Yi Yongsheng, ect.
Award of the project: 1998’ Best Survey Design Award of the Ministry of Construction (Third Prize)
Functions of the building: high-grade office, business, recreation
Total area of land used: 5,880㎡
Gross floor area: 130,000㎡
Number of floors: 3 underground floors and 26 floors on the ground
Building height: 91m
Designed seismic-resistance intensity: Richter scale 8
Ground foundation: natural foundation base, raft foundation
Structural type selected and design points: the structure is symmetrical reinforced concrete frame – dual-core structural system. Dual cores are used as main lateral force-resistant members of the structure, which gradually shrinks inward through multiple floors on the ground, and forms a two-tower structure surrounding the left and right core on the 19th floor and onward. The architectural body is considerably large, with unevenness caused by multiple shrinkage inward and super-long structure. But from architectural shape and functional requirements of use point of view, permanent structural joint to be made will cause substantial effect, and joint to be made underground is adverse to structural lateral limit. In view of the architectural features, after careful calculation and analysis is made and appropriate measures are taken, we are of the opinion that non-availability of structural joint can still meet structural requirements. This provides satisfactory structural scheme for the architect as well as Party A. Around the plane of each floor of the building shows obvious concave-convex shape. With height, it gradually shrinks inward into left and right tower. There is no super-long and straight section and there is exterior thermal insulation of the building, therefore, it is proper not to make expansion joint. In construction, the rigidity and reinforcement ratio of the floor slab of the first floor significantly affected by temperature and the floor slab of top floor (19th floor) between two cores are increased.