Earthquake Protection of Existing Structures with Limited Seismic Joint: Base Isolation with Supplemental Damping versus Rotational Inertia

Table 4

List of results considering average MAX values of response indicators (Monte Carlo method with 100 artificial samples).

Seismic retrofitting strategy	Superstructure-related response indicators						BIS displacement	TMD stroke
	Last-floor displacement	2nd interstory drift	4th floor acceleration	Base shear	Kinetic energy	Strain energy
#1. Conventional BIS (reference solution)	23.67	48.23	258.32	634.0	182.05	8195.1	21.81	—
#2. BIS with rotational inertia (TMDI)	13.59	30.37	183.59	390.0	70.31	3201.7	12.39	18.47
	(−42.6%)	(−37.0%)	(−28.9%)	(−38.6%)	(−61.3%)	(−60.9%)	(−43.2%)	(−15.3%)
#3. BIS with TMD	18.25	36.16	208.17	474.0	113.5	4512.6	16.85	48.16
	(−22.9%)	(−25.0%)	(−19.4%)	(−25.3%)	(−37.7%)	(−44.9%)	(−22.8%)	(+120.8)
#4. BIS with supplemental damping	16.32	34.89	204.5	452.3	97.65	4208.1	14.96	—
	(−31.0%)	(−27.6%)	(−20.8%)	(−28.8%)	(−46.2%)	(−48.6%)	(−31.4%)	—
#5. BIS with supplemental damping	14.65	34.89	204.5	416.0	97.65	4208.1	13.29	—
	(−38.1%)	(−27.6%)	(−20.8%)	(−34.4%)	(−46.2%)	(−48.6%)	(−39.1%)	—