Frame with braces

[engVassilev]

Hi everybody,

I've got a problem. I've got a steel structure - frames and vertical and roof braces. When I try to assign the loads on it using area uniform to shell function in the fields, where are the braces situated, they receive loads. I've read how to prevent this, but I compare two models with same geometry - the first one with moved braces and the second one - without moved braces. They have completely different modal behaviour. Do you have any idea why is this so?

 

[johnbridge231]

Select the braces and then: Assign->Frame Line->Auto Frame Mesh->None

Analysis and Design of arbitrary cross sections
Reinforcement design to all major codes
Moment Curvature analysis

http://www.engissol.com/cross-section-analysis-design.html