topic Re: create 3D truss? in Modeling

create 3D truss?

Anonymous — Thu, 14 Jul 2011 17:09:01 GMT

Hello,

is there a way to create a 3D truss like this one in the attached image??

Thanks

Re: create 3D truss?

Anonymous — Thu, 14 Jul 2011 17:11:49 GMT

Additionally, to fill the interior space between the axis, maybe with shell tool, however through a faster way??

Re: create 3D truss?

Anonymous — Fri, 15 Jul 2011 14:20:40 GMT

ok maybe there is no answer..
To put it somewhat differently: can we make something like a shell - curved surface, that resembles curtain wall??
I want to create a curved item made of flat surfaces similar to each other like triangles or hexagonals..

Thanks again

Re: create 3D truss?

Steve Jepson — Sat, 16 Jul 2011 01:39:00 GMT

Yes. You could make truss shapes to from something like a soccer ball skin using a veriety of shapes.

Are you interested in making something constructible, dimensionable, manufacturable, engineerable...real. Or are you just wanting to make pretend parts. Something that simulates the real thing?

Either way we can make something like this with ArchiCAD.

If you care to get a little more specific about the shapes you want for your orb, I would be interested in helping you find some interesting solutions.

Re: create 3D truss?

Anonymous — Sat, 16 Jul 2011 02:36:09 GMT

Could this be created faster in another 3d based program, then imported into ArchiCAD using IFC or even as a 3d dwg/object?

Surely doing this using the standard ArchiCAD tools will be tedious, and a pain to modify if something changes?

The ideal ArchiCAD-based solution would be to develop a parametric GDL object which would be freely adjustable in every way imaginable, but it would be quite a mathematical challenge!

I'll be interested to see what ideas Steve has up his sleeve!

Re: create 3D truss?

Steve Jepson — Sat, 16 Jul 2011 02:49:00 GMT

Clue #1:Buckminster Fuller

http://www.hoist-point.com/soccerball.htm

http://www.tutorialized.com/view/tutorial/Modeling-a-soccer-ball/63144

Re: create 3D truss?

Anonymous — Sat, 16 Jul 2011 08:48:25 GMT

in a first level I would appreciate sth that simulates the real thing, however my aim is to construct a dimensionable - real thing.
I believe that we could design this construction in a RHINO environment using 'paneling tools' but the drawback is the continuous feedback to Archicad in order to correct any changes..
Thus it would be priceless to be entirely constructed in Archicad.

Re: create 3D truss?

Anonymous — Sat, 16 Jul 2011 08:57:06 GMT

the attached image represents almost what I want to design: a geodesic dome composed by triangle or hexagonal surfaces which are supported by a load bearing truss..
I hope that this description is more helpful..

Re: create 3D truss?

Steve Jepson — Sat, 16 Jul 2011 09:10:27 GMT

Is that the one at the south pole? http://mooreturf.com/mo_southpole.php?a=4

http://www.temcor.com/specs.php

There are several manufactures of structural systems like this.
Any of them can be modeled quite accurately with ArchiCAD. Gussets are the key.

http://geometrica.com/

1-11-11@11

Re: create 3D truss?

Anonymous — Sat, 16 Jul 2011 10:25:06 GMT

Correct!
By gussets do you mean the joints??
I'm trying to find the method to do this...

Re: create 3D truss?

Steve Jepson — Sat, 16 Jul 2011 10:34:46 GMT

yes. the gussets can be modeled with snap points that will help with putting the model together.

Unless there is some point in re-inventing your own system, the idea would be to select a manufacture and model the components. That is make .gsm objects out of them.

Re: create 3D truss?

Anonymous — Sun, 17 Jul 2011 17:10:47 GMT

that is what I was thinking about, however it's a time-consuming method..
I was wondering about sth like a shell that could be transformed into a polyhedron..
I want to experiment with a lot of forms and I am looking for sth quicker..
Moreover think about designing the exterior surface + the interior truss + spider system of a complicated form and after the end of the process arising out a change!! Infinity waste of time!!!
I believe that Archicad team should foresee a prevalent construction like that being constructed easier..

Re: create 3D truss?

NCornia — Mon, 18 Jul 2011 04:55:21 GMT

Although this tutorial is for a pyramid, not a dome the method would be quite similar. Check out this article: http://www.archicadwiki.com/Pyramids

Re: create 3D truss?

Steve Jepson — Mon, 18 Jul 2011 05:00:26 GMT

and here is some software for designing the shapes

http://pyformex.berlios.de/examples/geometry.html

Re: create 3D truss?

Anonymous — Mon, 18 Jul 2011 11:28:07 GMT

great site Steve!!
Thanks!

But..... the competition is ahead: http://www.youtube.com/watch?v=RIIAzkr6TC8 (see from 2.40min)
or: http://www.youtube.com/watch?v=NLzYel2Ucgs&feature=related (7,55min)
or even closer to my desire: http://www.youtube.com/watch?v=vhz4uyXKsmQ&feature=related (!!!!!!!!!)

I believe it's sth really simple that GS should include to the new version...

Re: create 3D truss?

TMA_80 — Mon, 18 Jul 2011 14:37:08 GMT

I believe it's sth really simple that GS should include to the new version...

Re: create 3D truss?

TMA_80 — Mon, 18 Jul 2011 14:40:18 GMT

There is a geodesic object in this post but I don't know how flexible it is

http://archicad-talk.graphisoft.com/viewtopic.php?t=18943&postdays=0&postorder=asc&highlight=geodesic+geometric+structures&&start=0

Re: create 3D truss?

Anonymous — Mon, 18 Jul 2011 15:11:19 GMT

Actually this is just an object. It is not a dynamic deformation item..

Re: create 3D truss?

Steve Jepson — Mon, 18 Jul 2011 20:18:24 GMT

There is this one from ArchiCAD 6.5 I think.

Re: create 3D truss?

Anonymous — Tue, 19 Jul 2011 13:05:33 GMT

Steve, looks nice. Could you attache it?