determination of neutral axis for concrete shear wall

[OR-EIT]

I have looked everywhere for an example of the strain compatibility analysis that is used to determine the neutral axis of a concrete shear wall that corresponds to the maximum axial load and corresponding nominal moment strength for comparison with the value of c that is given by ACI equation (21-8).

Is there anyone out there who could point me in the right direction? Every example that I have followed neglects this calculation and just sites the value that was obtained from the strain compatibility analysis, without showing the actual analysis. Ugh.

 

[MOOK]

I have looked everywhere for an example of the strain compatibility analysis that is used to determine the neutral axis of a concrete shear wall that corresponds to the maximum axial load and corresponding nominal moment strength for comparison with the value of c that is given by ACI equation (21-8).Is there anyone out there who could point me in the right direction? Every example that I have followed neglects this calculation and just sites the value that was obtained from the strain compatibility analysis, without showing the actual analysis. Ugh.

Equation (21-8) is not used to calculate "C", It is used to check if the special boundary elements need to be reinforced or not.

 

[MOOK]

Equation (21-8) is not used to calculate "C", It is used to check if the special boundary elements need to be reinforced or not.

I mean to know if you need special boundary elements or not.

 

[Casey]

Check out the SEOC Seismic Design Manual Vol III...

They present three different methods there. Look at their hand calc.