DESIGN ON STAAD PRO

[Eabrar]

HELLO

I M DESIGNING A STRUCTURE. I MADE THE WHOLE SYSTEM OF BEAMS/COLUMNS/NODES ACCORDING TO MY NEEDS. THEN I ASSIGNED THEM PROPERTY ACCORD TO AISC. AFTER APPLYING LOADS NOW I WANT TO ANALYSE THE STRUCTURE. BUT THE PROBLEM I M FACING IS:

1. I DONT KNOW HOW TO ASSIGN VALUES OF FACTORS DEPENDING ON END CONNECTIONS LIKE KZ(FOR COLUMNS ETC) FOR FAILURE CRITERIA.

2. I M NOT SURE THAT W/O GIVING THE VALUES OF THESE CONSTANTS MY STRUCTURE CAN SAVE FAILRE CRITERIA.

WAITING FOR REPLY.

THANKS

 

[strangeoddity]

I am not sure which version of Staad you may be using, however:

In the graphical interface:
1. Click the design Tab
2. Pick AISC design code
3. Click Define Paramaters
4. In this portion you can define a variety of parameters (ie. KZ, KY, unbraced lengths...)
5. After you have assigned the parameters, simply assign them to the members.

Hope that was what you were looking for.

 

[Bagman2524]

The STAAD website is reiusa.com.
The above description looks good. The Kx, Ky and Kz factors are in local coordinates for the member. The STAAD defaults are: x is the longitudinal axis of the member, z is the strong axis of the member and y the weak axis of the member.

 

[PEStructural]

If you prefer putting the code checking in the input file, refer to "Section 2.4 - Design Parameters" in the help file. The code would look something like this:

PERFORM ANALYSIS
PARAMETER
CODE AISC
UNT 2 MEMB 6 8 13 14 (unsupported top flange length)
DFF 240 ALL (allowable deflection ratio)
DJ1 7 MEMB 7 10 12 (start joint of member for deflection purposes)
DJ2 8 MEMB 7 10 12 (end joint of member for deflection purposes)
DJ1 5 MEMB 5 9 11 (start joint of member for deflection purposes)
DJ2 6 MEMB 5 9 11 (end joint of member for deflection purposes)
RATIO 1.333 ALL (allowable stress ratio)
TORSION 1 ALL (design for torsion)
DMIN 0.8 MEMB 6 8 13 14 (minimum member depth)
PARAMETER
CODE AISC
CHECK CODE ALL
FINISH

This is a sample from one of my calculations for a beam/column structure. KX, KY, KZ and many other parameters are treated in the same way.

Hope this helps.