agV 0.45*agH "Ground acceleration"
qV 1.0 "Behavior factor"
SV 1.0 "Soil factor"
TbV 0.05[s] "Period time, first breakpoint"
TcV 0.15[s] "Period time, second breakpoint"
TdV 1.0[s] "Period time, third breakpoint"
betaV 0.2 "Lower limit factor"