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column effective length ETABS

column effective length ETABS

column effective length ETABS

(OP)
Hi, i'm trying to model a column that runs from the ground floor up to the 2nd floor without connecting to the 1st floor slab, that is length as one column should be double that of the other column and therfore its effective length is consequently larger than other coulmn. But, it seems to me that ETABS doesn't allow one column to run up 2 stories without breaking them up into two columns at syory levels. Can anyone help me with this?

RE: column effective length ETABS

You can do it, if you draw column on plan at Story1 and Story2 then it will put a node in the middle. If you draw the column in 3-d view you will be able to draw the column which doesn't insert a node at the intermediate story.

RE: column effective length ETABS

(OP)
Rcassar, i tried it it doesn't work

RE: column effective length ETABS

It's automeshing the column at the storey level during the calculation process.

Under Assign menu, remove automeshing for the frame member (when drawn full height), in particular the "mesh at visible gridlines". ETABS assumes a gridline is the same as a storey plane.

RE: column effective length ETABS

Can you manually remove/delete the node from the joint table?

RE: column effective length ETABS

Hi may be this help.
Draw the column in the two floors. Delete column in the first floor. Take the bottom joint of the column in the second floor, and select ALING/JOINT/FRAMES/EDGE option and put the level ground in the Z coordinate and then apply (normally 0-zero- is the level of the ground floor). Now, the column length is from ground to second floor. Be carefull with the K factor for column in both directions 2 and 3 local axes (slender column).

RE: column effective length ETABS

this factor can be overriden manually.

RE: column effective length ETABS

Quote (Trenno)

It's automeshing the column at the storey level during the calculation process.
Under Assign menu, remove automeshing for the frame member (when drawn full height), in particular the "mesh at visible gridlines". ETABS assumes a gridline is the same as a storey plane.

Trenno are you from Milan, Italy???

RE: column effective length ETABS

I am not.

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