STAAD Pro. v8i ~ Auto Seismic Loads Combination & Dead Loads in Seismic Load Case

Hi All,

Auto Seismic Loads Combination

I have question related to auto seismic load combination as per seismic load definition defined in STAAD program, putting the values of S1 and Ss, Importance and Response modification factor, I have concerns that will STAAD program calculate automatically the seismic forces both in horizontal and vertical direction as per below email extracted from the code;

E = (Rho) x Q_E (+/-) 0.2 x S_DS x D

If STAAD not calculates the forces automatically in seismic forces used in load combination, then we will have to calculate manually and then applied on the structure. Reply with some technical reference will be satisfactory.

Dead Loads in Seismic Load Case

Now this question is very basic but important for me as I am learner in STAAD, even if I defined the repeat loads cases in reference load definition, and again I recalled my loads (dead loads for seismic force calculation) in seismic loads definition, will I have to defined the dead loads in seismic load cases like in LC Seismic X and LC seismic Z? If Yes, then what are the function/ reason for defining the dead loads in seismic loads definition menu?

Keep sharing and thanks in advance.

W Haider