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Computational Design in Revit: Work Inspired by Sang Hoon Kim

Sang Hoon Kim 6

Some time ago I stumbled upon the work of designer Sang Hoon Kim while surfing the Internet. Bam! Revit model.

Sang Hoon Kim 3

Well, “Bam! Revit model” is slightly exaggerating. It took me about a month of tweaking before I was satisfied enough to write a post. I’m still not 100 % happy, but sometimes you just need to get shit out the door.

Sang Hoon Kim 8Sang Hoon Kim 8 hidden

My version of Mr. Kim’s design is obviously different from the original concept, but the inspiration is still apparent.

Sang Hoon Kim 1 hidden

This turned out to be an exercise in computational design studies in Revit. I originally wanted the entire model to iterate from one parameter (Universal Ratio), but that turned out to counteract the aesthetics. I tried to connect everything to the ratio parameter, but whether I used the golden ratio, 8:5, 4:3, 16:9 or Phi the model just would not look good. Or, as good as I expected.

Now, the total width and height are independent of the ratio, as are the angle parameters that control the radial placement of the vertical paths. The Universal Ratio is resigned to “just” control the horizontal relationships between the circles and the wood panel cross sections.

Sang Hoon Kim plan family2013-04-15 13-14-09

It is impossible to automatically align path nodes vertically and horizontally. The only way of doing this is using Reference Planes and Path Intersects, and that limits your ability to change the number of divisions. Room for improvement, Autodesk!

Sang Hoon Kim perspective family

The formulas used to control the geometry is inverted exponential. That is very easily shown with Image-O-Matic:

For more videos, please visit my YouTube channel.

For more images see Gallery.

Download Mass family: Sang Hoon Kim 🙂

Sang Hoon Kim 2


Some illustrations of my previous work

Barcode structure below

In a previous life, as a reseller consultant, I had the opportunity and extreme pleasure of assisting Multiconsult with making the most out of one of their first and biggest BIM projects. Multiconsult is a Norwegian engineering company with a big Oslo-office, and they sure as hell did not fear project size when the engaged BIM for the first time.

Barcode structure above

Barcode structure above with section box around two elevator shafts

This particular project was basically three huge buildings right next to the new Opera in Oslo downtown. The buildings now near completion and form a central part of the so-called Barcode strip, or OperaKvarteret in Bjørvika. They are designed by the three architectural companies MVRDV, Dark Architects and a-lab, and just recently won the City-award for 2013.

Bjørvika now

I also did some work for the architects on this project, but that was very little compared to the structural modeling. Check out this video to get a picture of what the architects had to deal with:

One interesting aspect of the structural job was that this was the first time any of us tried to export a real (as in not four walls and a slab) analytical model to Robot for structural analysis. This was way back in 2008 and 2009 when the analytical tools in Revit Structure was crap and we had to do A LOT of manual labor in both programs. Finally we did manage to get some not totally ridiculous results, and the illustrations made by the eminent Jozef Waligora at TDA are quite nice.

Barcode floor moment analysis in RobotBarcode foundation slab gravity deflectionBarcode foundation slab water pressure deflection

This is one of the coolest projects I’ve ever worked on, and I have both hopes and pretty decent indications that I will do similar stuff in the near future.