Structural Design of China Merchants Bank Headquarters Tower: Part 1 – Systems and Design

초록

Rising to a height of 388 m with a high slenderness of 9.2 and a side core plan layout, the China Merchants Bank Headquarters Tower in Shenzhen, a typhoon and moderate seismic region, poses major challenges to structural design of both its gravity and lateral force-resisting systems. Tuned Liquid Dampers (TLDs) are adopted to mitigate wind-induced motions for occupant comfort. Energy dissipating outrigger trusses with Buckling-Restrained Braces (BRBs) as diagonal web members are introduced to increase its lateral stiffness and to enhance its energy dissipation capacity in order to improve its seismic performance when subjected to Maximum Considered Earthquake (MCE) shaking. Both TLDs and energy dissipating outrigger trusses with BRBs are first successful applications in tall and supertall buildings in Shenzhen. A substructure analysis method based on the load paths and the capacity design principle is proposed and successfully applied to the analysis and design of the chord members and connections of the outrigger trusses to core walls and perimeter columns.