Base Isolation of Buildings with Curved Surface Sliders: Basic Design Criteria and Critical Issues

Table 5

Five columns frame: periods and participant masses (translation X, translation Y, and rotation Z in the vibration modes).

Mode no.	T (s)	Participant mass X	Participant mass Y	Participant mass RZ	Sum X	Sum Y	Sum RZ
1	3.259	0.001	0.999	0.335	0.001	0.999	0.335
2	3.259	0.999	0.001	0.390	1	1	0.725
3	2.750	0.000	0.000	0.275	1	1	1