DIRECT ANALYSIS AISC 360-10

Hi,

Presently i am using Staad Pro V8i (Select series 4) 20.07.09.31, and input given as below for example,

DEFINE DIRECT ANALYSIS

FLEX 1 ALL

FYLD 345000 ALL

AXIAL ALL

NOTIONAL LOAD FACTOR 0.002

END

LOAD 201 1.2 DL+ 1.6 LL

REPEAT LOAD

5 1.2 6 1.2 7 1.6

NOTIONAL LOAD

5 X 0.0024 6 X 0.0024 7 X 0.0032

PERFORM DIRECT ANALYSIS

1)      For the analysis i have chosen Direct analysis to design the members for stability to AISC 360-10 (LRFD). Hope that the Direct Analysis Procedures are included as per Chapter C of AISC 360-10, please clarify (as per reference in Staad Help 1.18.2.1.4 AISC 360-05 Direct Analysis mentioned as AISC 360-05 Appendix 7).

2)      Hope that the displacement results available in the post processing after Direct Analysis are using the full stiffness and not with reduced stiffness used in the direct analysis, please clarify.    

Thank You,

K. Mahesh Kumar