design on staad pro

huangyhg

design on staad pro
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
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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   
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   
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:
code
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.