Base Isolation for Seismic Retrofitting of a Multiple Building Structure: Design, Construction, and Assessment

Table 3

Nominal properties of rubber bearings.

Isolator Type	[kN]	[kN]	[kN/mm]	[kN/mm]	[mm]	[mm]	[mm]	[mm]	[mm]	[kg]	S1	S2
SI-S 600/168	1010	5410	0.67	813	600	168	268	318	850	435	18.1	3.45
SI-S 650/180	1260	6260	0.74	854	650	180	277	327	700	507	17.5	3.50
SI-S 800/180	3400	13280	1.12	1506	800	180	281	341	850	835	19.5	4.33

= maximum vertical seismic load; = maximum vertical design load in Ultimate Limit State (ULS); = effective lateral stiffness; = vertical stiffness; = diameter; = total rubber thickness; = total height (not including anchor plates); = total height (including anchor plates); = side length of anchor plates; = weight without anchor bolts; = primary shape factor; = secondary shape factor.