Reinforced Concrete Column Design
Reinforced Concrete Column Design
(OP)
A noob question right here:
To analyze the reinforced concrete capacity via computation method: First, I have to know if all steel (compression and tension) yields or just some. The acquired load capacity is then compared to the required load. It's tedious work.
If I utilize the interaction diagram, I can easily compute the steel area given the required axial and moment load. But, is there a way to know from the interaction diagram whether all the steel will yield or not?
Thank you!
To analyze the reinforced concrete capacity via computation method: First, I have to know if all steel (compression and tension) yields or just some. The acquired load capacity is then compared to the required load. It's tedious work.
If I utilize the interaction diagram, I can easily compute the steel area given the required axial and moment load. But, is there a way to know from the interaction diagram whether all the steel will yield or not?
Thank you!






RE: Reinforced Concrete Column Design
Or just calculate the depth of the neutral axis on a apreadsheet, which seems easier to me.
Doug Jenkins
Interactive Design Services
http://newtonexcelbach.wordpress.com/
RE: Reinforced Concrete Column Design
Biaxial column bending is the real pain. Hand calculations would generally be done using some sort of interpolation method based on the two uniaxial cases (PCA Load Contour). It is certainly possible to perform an exact solution. But, the amount of work required to do so is significant.
RE: Reinforced Concrete Column Design
I'm not saying people shouldn't use interaction diagrams, just that if you want to know if the reinforcement is yielded it seems easier to me to calculate the depth of the neutral axis directly, rather than trying to back-calculate it from an interaction diagram.
Doug Jenkins
Interactive Design Services
http://newtonexcelbach.wordpress.com/
RE: Reinforced Concrete Column Design