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

Table 4

Acceptance tests results on rubber bearings.

N.	Isolator Type	Vertical stiffness [kN/mm]	Dynamic shear modulus [MPa]	Static shear modulus [MPa]	Viscous damping [%]
1	SI-S 800/180	1508	0.30	0.46	16.8
2	SI-S 800/180	1524	0.31	0.46	16.2
3	SI-S 800/180	1501	0.31	0.46	16.7
4	SI-S 800/180	1512	0.30	0.46	16.5
5	SI-S 650/180	862	0.33	0.45	16.2
6	SI-S 650/180	828	0.30	0.42	17.3