BOUNDARY CONDITIONS

[zourguinadjib]

Good evening,
I 'am a beginner in opensses, i have been tried to modelise a simple 2d truss and i found a problem about the boundary conditions.

i introduced :
fix 1 1 1

and the opensees dosn't know this command "invalid command name "fix""
I want to know where is the problem .
Thank you

[kadirtopcu]

if you try to fix a node your command sould be like this:

if it is 2D
fix a 1 1 1 >> a is your node number and you have 3 DOF

if it is 3D
fix a 1 1 1 1 1 1 >> a is your node number and you have 6 DOF

[zourguinadjib]

Thank you for your help kadirtopcu