Atrium Considerations in Fire Protection Methods: Dabaihui Plaza, Shenzhen

Session: Track D: Façade Engineering Award, Life Safety Design Award, Part 2 & Innovation Award, Part 2

Kelvin WongToby WhiteProject image

Kelvin Wong
Associate, Arup

Toby White
Associate Principal, Arup
New York City

Located in the central business district of Shenzhen, China and on the east side of the axis, Dabaihui total construction area of 145,520 square meters with 135,600 square meters above ground and 9600 square meters below ground. It is the center piece of the Gangxia Redevelopment which consists of more than 10 parcels of commercials, offices, residential, hotel, administrative use and educational developments.

The tower consists of an 80-meter (262 ft) outdoor crown above the highest office level around 300 meters (984 ft), plus two 50 meter (164 ft) tall office atria at the upper levels. An engineering approach has been proposed and adopted to determine the structural fire protection requirements for the structural members, which consist of a performance-based design with the consideration of actual fire risk, fire load, structural loading, external environment, cooling effect, etc. Since the structural steel members are in two different environments (i.e. completely outdoor at the tower crown and indoor in the atrium), different fire models have been adopted for the structural fire engineering calculations. The models include standard fire curve ISO834 for typical enclosed space, zone fire model for high ceiling large compartment areas such as atrium, and outdoor fire model for structural members located in the external environment.

A structural fire protection calculation methodology was proposed for the atrium and the outdoor environment and successfully adopted in this 380-meter (1246.7 ft) tall building. This method can optimize the required fire protection which results in significant cost savings in fire protection materials, a reduction in construction time including the application and curing of paint which normally takes multiple layers in a very clean environment, the maintenance cost, and most importantly a very elegant architectural appearance. The savings and lessons from this project can easily and quickly be transferred to use in other similar projects.

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