ETABS results on Beam Design.

[Md Hadiuzzaman Saikat]

While designing beams in ETABS, the results display separate values for total longitudinal reinforcement, torsional longitudinal reinforcement, and flexural reinforcement. However, the sum of torsional and flexural reinforcement does not exactly match the total longitudinal reinforcement—there is a slight difference. In this case, should I consider the sum of flexural and torsional reinforcement, or should I rely solely on the total longitudinal reinforcement for beam design?

 

[Luceid]

Run some hand calcs to check the different values?

 

[JoshPlumSE]

Having done tech support for a DIFFERENT program in the past, I have a theory of what could be happening:
a) Flexural requirements may control at location A for top steel and load combination X.
b) Flexural requirements may control at location B for bottom steel and load combination Y.
c) Torsional steel longitudinal requirements may apply at location C and load combination Z.

The program then amalgamates the total steel to see that it satisfies the total requirements for locations A, B and C for all load combinations X, Y and Z....