ICONS
a y1= Yield pseudo-acceleration for the first mode [m/s 2 ]
C R= Spectral displacement ratio
d 1,max (X) = Maximum displacement of the modal single degree-of-freedom system for the (X) earthquake direction [m]
f e = Carrier Calculated linear (elastic) strength demand for the system
f y = Projected ductility capacity and period-dependent yield strength
S ae (T 1 ) =Linear elastic spectral acceleration corresponding to thefirst natural vibration period T 1 [g]
Sde (T 1 ) =Linear elastic spectral displacement [m] corresponding to thefirst natural vibration period T1
S di (T 1 ) =Nonlinear spectral displacement corresponding to thefirst natural vibration period T1[m]
T B= Horizontal elastic design acceleration spectrum corner period [s]
T 1= Natural vibration period of the first mode [s]
μ(R y ,T 1 ) = Yield Strength Reduction Coefficientandductility demandcalculated according to the first natural vibration period
ω 1(1) = First modenatural angular frequency[rad/s]found from the free vibration calculation, which is renewed at each kth thrust step
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