Grasshopper

algorithmic modeling for Rhino

Section offset creates unwanted fixed support

Hi.


Creating Cross section offsets to a column, seems to force fixed supports to a column element. Even though the support is simple. Taking away the offset creates the wanted pinned support again. Is there anyway to get around this to use correct element offsets, but still with the wanted boundary conditions?

Thanks Rasmus


Without offset

With offset

Views: 196

Replies to This Discussion

Permalink Reply by Karamba3D on February 20, 2018 at 3:28am

Hi Rasmus,

eccentricities are modeled as rigid connections between the centroid of a cross section and the corresponding beams end-points. The support conditions apply to the points on the beam axis.

The reason why one uses eccentricities is normally to get the moments at the end-points due to normal forces. Why do you want to use them without getting their mechanical effect?

Best,

Clemens

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