A New Method to Calculate Additional Damping Ratio considering the Effect of Excitation Frequency

Table 3

ADRs calculated using different methods.

	ADR (%)
Seismic wave	Ωm = ω	Ωm ≠ ω
	ERM	Equation (29)	Nonlinear time-history analysis method		Equation (30)
			NMA [29]	Code method [35]
KEAT	12.19	12.23	16.61	13.92	13.43
SATI	8.00	8.13	9.57	8.05	8.79
KEHO	12.27	12.92	15.59	14.16	13.97
NEWH	9.32	9.78	13.52	11.59	10.32
ELCE	9.68	9.74	13.53	12.59	10.00.
TAFT	10.39	10.68	15.25	13.77	11.74
TABA	9.66	10.05	13.95	12.30	10.52
IRAR	11.13	11.16	13.92	11.82	12.44
IRAU	13.68	13.74	18.98	15.35	15.45
MACO	13.64	14.07	16.95	14.76	15.80

Note. ADR of NMA = (energy dissipated by VFDs/energy dissipated by modal damping) × inherent structural damping ratio.