Seismic Performance Evaluations of Mega-Sub Isolation System

Table 4

Comparison of peak accelerations of the megastructure in X direction between the experimental and numerical simulation results of the isolated structure (unit: g).

Cases			Artificial (0.125 g)	El centro (0.125 g)	Taft (0.125 g)	Tangshan (0.125 g)	Artificial (0.275 g)	El centro (0.275 g)	Taft (0.275 g)	Tangshan (0.275 g)
Floor	1	Experiment	0.1278	0.1411	0.1237	0.127	0.2696	0.2478	0.2217	0.3597
		Simulation	0.0988	0.1071	0.0994	0.1157	0.2384	0.2053	0.1905	0.3013
		Error (%)	17.91	24.10	19.64	8.89	11.57	17.15	14.07	16.24
	2	Experiment	0.1457	0.1494	0.1105	0.1652	0.2635	0.2483	0.267	0.3312
		Simulation	0.0992	0.1148	0.0976	0.1442	0.2002	0.1609	0.2326	0.257
		Error (%)	24.25	23.16	11.67	12.71	24.02	35.19	12.88	22.40
	3	Experiment	0.1223	0.0848	0.06905	0.084	0.1981	0.1414	0.1735	0.204
		Simulation	0.091	0.0749	0.0599	0.072	0.1561	0.122	0.1426	0.1654
		Error (%)	25.69	11.67	13.22	14.29	21.20	13.72	17.81	18.92
	4	Experiment	0.146	0.1843	0.1013	0.1419	0.2495	0.3203	0.3079	0.3138
		Simulation	0.113	0.1605	0.0972	0.1406	0.2393	0.2665	0.2845	0.3291
		Error (%)	22.54	12.91	4.05	0.92	4.09	16.80	7.59	2.58