Experimental Research on Damping Effect of Double-Layer Tuned Mass Damper for High-Rise Structure

Table 4

Information of the ground motions.

Excitation types	Record sequence number (RSN)	Name	VPP (s)	M	Bracketed duration (≥1/3Amax) (s)	Energy duration (5%–95%) (s)	Peak ground acceleration (PGA) ()
Site-II	56 (130)	San Fernando	—	6.61	11.6	18.9	0.071
	56 (220)	San Fernando	—	6.61	14.7	18.9	0.071
	83	San Fernando	—	6.61	8.4	14.3	0.074
Near-fault pulse-type (NFPT)	2457	Chi-Chi_ Taiwan-03	3.18	6.20	5.7	12.9	0.187
	900	Landers	7.50	7.28	8.3	18.9	0.245
	6911	Darfield_New Zealand	9.92	7.00	7.6	9.5	0.450
Long period (LP)	69 (249)	San Fernando	—	6.61	51.7	52.4	0.029
	74	San Fernando	—	6.61	33.6	29.6	0.007
	90 (132)	San Fernando	—	6.61	51.4	49.3	0.017