Table 6 Seismic performance indices of the test specimens.

From: Seismic performance of a new precast concrete frame joint with a built-in disc spring

Specimen

Δy (%)

Py (kN)

Δm (%)

Pm (kN)

Δu (%)

Ductility coefficient μ

Failure mode

ERC2

0.77

28.46

1.50

32.20

3.50

4.56

FF

EPC2

0.74

32.38

1.50

38.65

3.01

4.09

FF

EPC4

0.59

52.72

1.50

62.15

2.34

3.97

FF

EPCD2

0.76

42.20

1.50

50.00

3.68

4.85

FF

EPCD4

0.60

59.90

1.00

70.95

2.77

4.62

FF

IRC2

0.67

58.38

1.00

70.35

3.91

5.84

FF

IPC2

0.82

61.01

1.00

71.30

4.23

5.16

SF

IPC4

0.63

75.44

1.50

89.65

2.94

4.65

FF

IPCD2

0.70

63.25

2.00

72.50

4.68

6.66

SF

IPCD4

0.64

72.44

1.50

86.70

3.14

4.89

FF

  1. μ is the displacement ductility coefficient, FF is the flexural failure, SF is the shear failure.