Dynamic Response of a Combined Isolation Based Mega-Substructure under Bidirectional Near-Fault Ground Motions

Table 1

Isolation bearing parameters.

Parameter	Shear modulus	Overall height	External diameter	Diameter of lead	Total height of rubber	Total height of steel plate	Horizontal stiffness	Vertical stiffness	Horizontal stiffness (elastic sliding)	Friction coefficient (elastic sliding)
Unit	MPa	mm	mm	mm	mm	mm	N/mm	kN/mm	N/mm	—
Value	0.392	35	65	10	7(6)	2.0 × 4(3)	145.1 (164.7)	22.5 (19.3)	134.1 (149.8)	0.04

Note. The values in brackets represent the relevant parameters of the third subframe isolation bearings, and the rest are the common parameters of the second and third subframe isolation bearings.