Seismic Performance of Precast Concrete Columns with Improved U-type Reinforcement Ferrule Connections

International Journal of Concrete Structures and Materials

Table 5 The equivalent viscous damping coefficient of the specimens.

No.	The equivalent viscous damping coefficient h_e
No.	∆_y	2∆_y	3∆_y	4∆_y
BASE	0.060	0.086	0.116	0.127
ZP1	0.047	0.067	0.097	0.107
ZP2	0.062	0.085	0.117	0.128
ZP3	0.055	0.080	0.111	0.121
ZP4	0.070	0.083	0.113	0.123
ZP5	0.078	0.092	0.119	0.138
ZP6	0.060	0.087	0.132	0.143