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Table 1 Parameters of isolation bearing

From: Study on mechanism and influential factors of progressive collapse resistance of base-isolated structure

Project

Parameters

Project

Parameters

Product outer diameter (mm)

100

Height (mm)

53

The thickness of the protective layer (mm)

5

First shape factor S1

15.0

Rubber outer diameter (mm)

90

Second shape factor S2

5.0

Lead diameter (mm)

15

Reference surface pressure

10

The thickness of each layer of rubber (mm)

1.5

Vertical stiffness (kN/mm)

152.3

Number of rubber layers

12

Yield force (kN)

1.409

The thickness of each layer of steel plate (mm)

1

Stiffness after yielding 100%

0.139

Number of layers of thin steel plate

11

Equivalent stiffness 100% (kN/mm)

0.217

The thickness of the sealing plate (mm)

12

Equivalent damping ratio 100%

21.9