Multihazard Response Control of Base-Isolated Buildings under Bidirectional Dynamic Excitation

Table 1

Properties of the superstructure and isolation systems of base-isolated buildings.

Component of base-isolated buildings		Parameter	Unit	Values/range of the parameter used in the study
Superstructure		Mass of each floor,	kg	1,427,100
		Base mass,	kg	1,427,100
		Damping ratio,	—	0.02–0.08
		Fundamental time period, ^∗	s	0.1, 0.2, 0.4, 0.6, and 0.8
		Height of each story, H	m	3.5
Base isolation system	N-Z system	Isolation time period,	s	2.5
		Isolation damping ratio,	—	0.05–0.15
		Normalized yield strength,	—	0.025–0.2
		Yield displacement,	cm	2.5
	LRB	Isolation time period,	s	2, 2.5, 3, and 3.5
		Isolation damping ratio,	—	0.025–0.25
	PF system	Friction coefficient,	—	0.025–0.2
		Yield displacement,	cm	0.025
	FPS	Isolation time period,	s	2, 2.5, 3, and 3.5
		Friction coefficient,	—	0.025–0.25
		Yield displacement,	cm	0.025
	R-FBI	Isolation time period,	s	2.5
		Isolation damping ratio,	—	0.05–0.15
		Friction coefficient,	—	0.025–0.2
		Yield displacement,	cm	0.025

^∗The values are given for the fixed-base models of 1, 2, 4, 6, and 8 story buildings, respectively.