Design concrete Column for Axial only
Design concrete Column for Axial only
(OP)
I am designing a concrete column and would like to design it for axial only. we have enough shear wall to take the lateral load but in reality the column will be cast together with beams and dowel bars and there will be moment at connections. I want to assume pin connection in the model because the column sizes are limited, and in reality the bar will be yield if capacity maxed out and lateral load will be taken by shear wall.I don't know if i need to do a section analysis to ensure concrete crush will not be the failure mode (for moment and axial load in reality case) at the connection.
Thanks for any comments or input.
Thanks for any comments or input.






RE: Design concrete Column for Axial only
RE: Design concrete Column for Axial only
RE: Design concrete Column for Axial only
If you want to entirely neglect moment, disrupt moment continuity by any practicable (and allowed) device whilst retaining the whole stability of the outfit. This, ordinarily, is one of the fields of prefabricated structures, but you can port what convenient to your more in-situ case.
RE: Design concrete Column for Axial only
RE: Design concrete Column for Axial only
What kind of column section, loads, and reinforcement ratio are you looking at?
I'm just surprised that you can get a column to work for axial only, but are having difficulty getting a relatively small amount of moment to work with it.
RE: Design concrete Column for Axial only
RE: Design concrete Column for Axial only
And designing a concrete column for moment and axial is just putting it in a spread sheet or MathCAD.
RE: Design concrete Column for Axial only
If you have any type of earthquake in the area, design for the moment the column attracts!
If no earthquake, a smaller column will attract a smaller moment. But is will still attract it. If the column is cracked, it is ok to use cracked stiffness so that it attracts less moment. But you should design for the moment it will attract. Redistribution is not allowed from non-ductile members and columns are usually not ductile.
And, as mentioned above unsightly cracking is a real possibility.
RE: Design concrete Column for Axial only