## Cantilever column with geometric non linearity

## Cantilever column with geometric non linearity

(OP)

I have a cantilever column of length 1m.

I have applied a lateral load of 200 kN uniformly distributed over the length of the column

I have carried out a geometric non linear analysis and see that the (maximum deformed) statistics are as follows:

-314.40 mm(translation X)

0.00 (translation Y)

-49.62 mm (translation Z)

0.00000(rotation X)

-0.38930 (rotation Y)

0.00000 (rotation Z)

I get a very high axial force on the column of 1565.60 kN

Since the translation and rotation is high I am guessing my high value of axial force is because my load (lateral) of 200 kN is NOT a follower load i.e. it DOES NOT REMAIN perpendicular to the column throughout. Thus, the load has a contribution / component along the axial direction resulting in high axial forces.

Is that possible? Any thoughts?

I have applied a lateral load of 200 kN uniformly distributed over the length of the column

I have carried out a geometric non linear analysis and see that the (maximum deformed) statistics are as follows:

-314.40 mm(translation X)

0.00 (translation Y)

-49.62 mm (translation Z)

0.00000(rotation X)

-0.38930 (rotation Y)

0.00000 (rotation Z)

I get a very high axial force on the column of 1565.60 kN

Since the translation and rotation is high I am guessing my high value of axial force is because my load (lateral) of 200 kN is NOT a follower load i.e. it DOES NOT REMAIN perpendicular to the column throughout. Thus, the load has a contribution / component along the axial direction resulting in high axial forces.

Is that possible? Any thoughts?

## RE: Cantilever column with geometric non linearity

just 200NOT## RE: Cantilever column with geometric non linearity

another day in paradise, or is paradise one day closer ?

## RE: Cantilever column with geometric non linearity

Doug Jenkins

Interactive Design Services

http://newtonexcelbach.wordpress.com/

## RE: Cantilever column with geometric non linearity

## RE: Cantilever column with geometric non linearity

Another way to tell is be looking at the reaction forces. Is the net reaction force 10 000 kN in the +X direction, balancing an applied non-follower 10 000 kN in the -X direction? If there's any reaction force in the Z direction, then it would be a follower load.