ubcaci earth quake strength design

huangyhg

ubc/aci earth quake strength design
aci-318-08/ubc load combination states
1.2d+1.0e
where e = earthquake load
ubc 97 section 1630 states
e= p eh + ev,
em= omega eh,
where eh = base shear v.
my question is
1. does staad, sap consider this equations when doing auto generation for load combination. because i checked staad for seismic on self wt and it used the e = v, which by above equations is not right. i assume software is doing it right and i am not looking it correctly .. so if any one can explain .... please do.
2. what are the conditions (if any ) in which i can take e= v?
p= 2-20/rmax*sqrt(ab)
say i am designing a pipe rack or an equipment structure, what shall i use in ab? there is no slab element...
can any one help me out here?... and explain how this works