Shaking Table Testing of a Scaled Nuclear Power Plant Structure with Base Isolation

Table 2

Rubber bearing performance parameters.

Parameters	Unit	Value
Model	—	LRB220
Size	mm	220.00
Design displacement	mm	100.00
Average pressure	MPa	1.98
Total rubber thickness	mm	40.00
Yield force	kN	6.70
Vertical stiffness	kN/m	440
Vertical bearing capacity	kN	314
Horizontal performance value at 100%
Equivalent stiffness	kN/m	475
Equivalent damping ratio	%	12.3
Horizontal performance value at 250%
Equivalent stiffness	kN/m	345
Equivalent damping ratio	%	12.3