Core Design
Designing the core of our highrise revealed some inaccuracies in our original design. In order to accommodate the size and number of elevators, fire stairs, restrooms, and other service rooms, the original footprint of our core was enlarged. One of the sets of fire stairs was moved to the east side of the building to get some separation from the other set. This creates the possibility of a core on each side of the building adding some opportunities for stabilizing the structure and also dealing with climate issues. Ken Yeang actually suggested that dual core highrises may be a good solution.
In order to accommodate the flow of elevator passengers, we divided the highrise into 2 zones. One bank of elevators for levels 1-18, and the other bank serves the upper floors. The freight elevator has its own lobby and serves all floors. Restrooms are added in the lobbies of the bank of elevators that do not serve that particular floor.
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| Ground Level |
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| Floors 2-18 |
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| Floors 19-31 |
Calculated Loads
After designing the biometric skyscraper, the design was entered into the Multiframe structural program to analyzed and study loads and determine structural member sizing. We based our load sizing off of the IBC section 16. The ground floor, being shopping and gathering, was rated at 100 pounds per square foot for live load. The terraces, bridges and walkways were also rated 100 psf. The office levels we rated at 75 psf to account for 80 psf for corridors and 70 psf for office space.
Our first iteration structural model in Multiframe had a Total Dead Load of 28545.9 Kips.
Non-Structural Dead Load = 16859.81 Kips
Structural Dead Load = 8946.2 Kips
Enclosure Load =2739.94 Kips
Determining seismic loading involved a factor of 2 from the total dead load multiplied by 20% of gravity to get an acceleration of 144 that we entered into Multiframe.
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