Hi All,
Is it possible in STAAD Pro. to design a steel composite beam with positive moment as what may happen on continuous span? I got a warning when checking a beam that my beam has positive moment which have not designed for.
Is there any solution for this?
Thank you
As of now, STAAD.Pro can handle positive moments in the design of composite beams for code check as per the AISC 9th edition code only ( CODE AISC ). For that code, if the critical section is at a location that has the concrete in tension, it designs the section as a non composite section. For the LRFD 3rd edition implementation ( CODE LRFD ), the software ignores the positive moments while carrying out the composite beam design and prints a warning message, as you mentioned.
Answer Verified By: bmi
Thank you Sye,
I noticed that the AISC Code can perform design check for my case but I wonder why STAAD did not put the same design check for the LRFD, is it under development? I think it is an advantage for user to have the design check for LRFD Composite with positive moment also.
one more question, on the AISC composite design check which one control the beam capacity, is it max. positive or max. negative (or whichever bigger)?
really appreciate your support.
Yes composite design will be implemented for the newer version of the AISC code and it would design the sections as non-composite for positive moments. For the AISC 9th edition check, the design is carried out for positive ( non-composite ) and negative moments (composite ) and the one which yields higher utilization ratio is reported as critical.
Thank you,
I am expecting the new AISC version then. Do you know the planned release date?
Unfortunately I do not have a release date yet.