Dear all,
I was working on a STAAD model of steel structure of a building , and I got few warnings I would like to understand how to deal with it :
1- *** warning *** dynamic masses in global x y and z directions are not same.
and I dont actually know why this pop up, I am defining the mass in all directions X,Y,Z the same as each other !!!
it's worthy to mention that I am defining the mass load for the spectrum case assigned in it as member and floor loads, but it has (1.0DL + 0.5LL),
on the other hand, I have defined reference load for the diaphragm to take place but the mass defined is (1.0DL + 1.0LL)
I don't know if this may contribute in the problem !!!?
2- *** NOTE: MASS MODEL FORMED WILL BE USED IN SEISMIC/RESPONSE/TIME HISTORY LOADING, IF ANY.
IF MASS MODEL IS SEPARATELY PROVIDED IN INDIVIDUAL LOADING, THE GENERATED MASS
WILL BE REPLACED BY THE MASS PROVIDED IN INDIVIDUAL LOADING.
what does this warning means !?
thanks in advance everyone for helping me !