Support conditions in Karamba

Replies to This Discussion

Permalink Reply by Robert Vier on June 10, 2012 at 6:15am

Yes, they are alright!

A complete collection would be pretty extensive since there are somewhat like 2^6 = 64 different combinations, but you are right we should think of some explanatory drawings.

Permalink Reply by Robert Vier on June 10, 2012 at 6:25am

Truss members can be defined in two ways:

1) modify beam component: set bending input to false

2) cross section joint component: set degrees of freedom Tx,Ty,Tz,Rx,Ry,Rz for each end of elements for a specific beam id (only available in pro version)

Permalink Reply by djordje on June 10, 2012 at 6:42am

Thank you for the reply Robert.

How does solution number 1) effect on supports?

If I set the bending input to "false", does that mean I can not have "rigid" supports? The "bending - false" thing will effect all my members, and there for I could not have rigid supports at all?

Permalink Reply by Robert Vier on June 10, 2012 at 7:31am

the bending input affects all beams you treat with it, yes. but 

A) you specify two sets of beams, one with bending and one without    or

B) you make it a truss system and pin-support both chords

Permalink Reply by djordje on June 10, 2012 at 4:53pm

For solution A):

Only beams which will have supports on one of their ends will be have bending input to "true". All the rest ones (let's suppose I want my truss connections to be hinged and supports to be rigid) will have bending input to "false"?

I did not understand you about the solution B, sorry.

Permalink Reply by Wilinton Felipe Colunche Núñez on April 14, 2019 at 11:52pm

Hello, sorry you know how to achieve the articulated connection in truss ?. I am new to this and would like to know. Articulated connections and fixed or fixed and mobile supports. . Thank you :)

Permalink Reply by Karamba3D on April 16, 2019 at 1:34pm

Hello Wilinton,

truss elements - e.g. beams with 'bending' set to false - have only translational degrees of freedom at their ends. It is therefore only possible (and meaningful) to set translational supports there: Tx, Ty or Tz.

For details regarding the 'Support'-component please see the manual at https://www.karamba3d.com/download/#manual.

Best,

Clemens