initial imperfection in 3D trusses

[masoudgh]

Hello
Can someone suggest a way to define initial imperfection in 3D Trusses?

Thanks
MGJ

[fmk]

some initial stress or initial strain in the material! .. turss elements are by definition straight .. if you want to model lac kof straightness you need to model with beams with small bending stiffness.

[masoudgh]

fmk wrote:
> some initial stress or initial strain in the material! .. turss elements
> are by definition straight .. if you want to model lac kof straightness you
> need to model with beams with small bending stiffness.


Thanks
but how can I do that?

[fmk]

google opensees and the words initial strain or initial stress .. the last option you should be able to figure out yourself if using opensees.