Grasshopper

generative modeling for Rhino

Gridshells

Hi Guys,

Would anyone know a good book or website about gridshells ?

thanks,

Arthur

Tags: gridshell, structure

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Replies to This Discussion

Permalink Reply by Mark Cabrinha on August 12, 2009 at 8:11am
Thank you!
Permalink Reply by Arthur Mani on August 15, 2009 at 6:57am
Hey Mark,

Here is a definition i have been working on thanks to your help and Hyunbai Jun, a friend of mine:


Here is the def.
Thanks so much for the book it s amazing.

I m now working on a definition to place a mesh/polysurface using the intersection points of the geodesic curve.
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Permalink Reply by Mark Cabrinha on August 16, 2009 at 1:05pm
FANTASTIC!
Permalink Reply by Arthur Mani on August 25, 2009 at 2:45am
Hi Mark,
Glad you like it:)
Steel gridshells always seems to be triangular and i am currently working on a large one.
The definition i posted is not triangulating the shell which is why i have to mesh things afterwards.
How did you deal with bracing in the several gridshells you have worked on ?
How would you deal with triangulation if this was necessary?
Many thanks
Permalink Reply by Mark Cabrinha on August 25, 2009 at 9:55pm
Hi Arthur,

I worked on a modified version of your solution which created geodesics from a surface with four boundary curves, rather than the continuous boundary curve in your example. The way the geodesics were laid was really finicky so I did not post it here, but interesting enough, did the same thing manually in Rhino and got the same results - so it is not the GH definition.

To answer your questions:
If the gridshell is truly a structural shell, then bracing should not be required. BUT, I am an architect, not an engineer....

As for triangulation, that kind of flies in the face of the geodesics at least as I approached them to get curved elements from straight segments. Lot easier to just go ahead with straight segments in the first place, especially if using steel. That is, what would you lose by just using one of the various diagrid GH definitions floating around? However, if you take a look at Gehry's lattice enclosure over the lawn at the Chicago Millenium Park bandshell, those members are curved (a little chunky but a nice solution). Depending on your shape, the geodesics might help to segment into singly curved pipe sections, rather than the likely and costly alternative of double curved pipes.
Permalink Reply by Claudio on December 18, 2009 at 11:55am
i WILL ALSO LIKE TO borrow the IL 10 scan? I'd be very grateful as I'm doing some projects for a stadium: claudioarchi@hotmail.com

cheers
Permalink Reply by Arthur Mani on August 26, 2009 at 3:37am
Thanks Mark,
If a geodesic line would be made of small straight segments, it wouldn't keep all of its structural properties?
Buckminster's dome were made of straight segments.
I am getting a bit confused.
You think in the case of triangulated steel gridshell like the British Museum extension by Foster... geodesic lines are actualy not so relevant?
Permalink Reply by Mark Cabrinha on August 26, 2009 at 11:20am
Good questions and interesting point on Fuller's Geodesic domes. A simple study would be to do structural analysis of a Bucky Geodesic and with a GH defined Diagrid....some other day. Note, his domes use "great circles" which would be geodesics, but not the only way to subdivide the sphere in geodesics. For example, I applied your GH definition to a 1/3 sphere. More to the point: the geodesic lines is just geometry, so I would be cautious about defining those structural properties without the surface and position on that surface in which they are applied.

Not sure about the British Museum, but there is a rather thorough essay on their Smithsonian roof that I will try to find.
Permalink Reply by Ben Sitler on December 19, 2009 at 1:58pm
Perhaps this has already been mentioned but Dr Chris Williams of the University of Bath is rather knowledgeable about form finding of gridshells. He worked on the British Museum Great Court Roof. http://people.bath.ac.uk/abscjkw/
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Permalink Reply by punkhead on March 6, 2010 at 10:19pm
Dear Mark ,

Could i also ask you to send me a copy of your IL 10 gridshells too.
My email is rthako@deakin.edu.au

Many Thanks
Permalink Reply by David Wood on April 9, 2010 at 4:32am
Does anyone have any experience building prototypes/mockups of gridshells?

Mark, would you be so kind as to forward me a copy of your IL 10 Gridshells?
david@glennhowells.co.uk

Thanks a lot.
Permalink Reply by Leonid Krykhtin on June 16, 2010 at 6:25am
Hi everybody!
I'm doing a project where there are complex gridshells to be made with none right angle grid.
The only examples I could find suggest U and V section planes and right angle grid shells. But I need to find out how to manage complex gridshells in order to prepare a file for manufacturing on 2-axis milling machine.
Here are my renders made in 3dsMax without Grasshopper and a Rhino file with initial geometry to make parametric gridsells out of them as shown on the renders.
Please, help me. It's really important.
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