Hyperbolic structures under wind load
Walkability within the slab is a major issue to consider and affects the entire structure. My multi functional public space underneath is also highly focused on pedestrians. This kind of relationship is the essence of how the corporate space begins to correlate to the public space underneath. Traffic under the slab should be reduced to 20mph which greatly increases multipurpose use of the streets by public. This can be done with limiting the distance a driver can see up the road to 40m, making them drive more carefully. This starts to define the planning under the slab. Research stuff:
I got some super great research from Jan Gehl titled ‘Close encounters with buildings’ its all about the interaction between public and facades. They derive many great typologies. I think maybe these are best used in the design of the hyperbolic towers? One point is street scape variety needs vertical elements at the ground and I certainly have this with the columns, so making them a real urban design element is good. The scale from which the facade is viewed diagram is great and will relate to the slab openings and towers.
I want to highlight that the design of the exterior environment is just as important as the design of the interior environment, especially with my slab proposal. The design of the exterior concerns the design of how people interact with each other and the built, how they move past and through the built. This goes together with all the climatic considerations. This summary table from Gehl sums it up:
In terms of climate in the slab the horizontality means that most things can be handled with natural ventilation and lighting. Natural ventilation will come up in small ventilation towers around the office, ideally around columns , so they can connect up the column to the electricals in the ceiling (will draw this). So I will need an ecotect wind study of how wind flows around the slab, at some point it will be too weak for natural ventilation. Interesting is the lift that it may generate on the slab. It is flat, so it should not be great, but if out was I would need to place taller buildings or trees around the perimeter at ground level under the slab, to filter the wind force. Will draw that I don’t need this. In terms of natural lighting I imagined the idea of ‘natural light chandeliers’ (since I have a 2-3m thick ceiling, not so easy to do skylights even if they are large) and found a percedent plus the whole system, with calcs.
If the ceiling reaches 3m thickness (because of need to accommodate lift machine rooms and lots of extractors and outlets in the ‘laboratory’ part of the office, the main problem will be dispersing light from the cut-out holes in the slab, horizontally. So the main design of the ‘natural light chandelier’ or ‘sun chandelier’ should be horizontal light dispersal. Along these lines I though that if I have a church going through one of these holes, its dome can be reflective and disperse light horizontally into the public street-scape, different take on the church of light (I have a sketch).
In terms of the 7 TS spreads, I will have them for tomorrow.
P.S. This is interesting, a list of terms that define all the current major ideas/theory on public space (from Centre for Public Space Research, Denmark):