Table 10 Third layer displacement seismic response.

From: Shaking table tests and analysis of the seismic behavior of external steel frames with viscoelastic nodal dampers

Parameter

Working conditions

Input seismic waves

EL

Taft

Lanzhou artificial wave

Damping effect of dampers under different working conditions (PGA = 0.2 g)

 Floor 2 story drift damping effect % (displacement / mm)

Original framework

(2.53)

(3.35)

(1.31)

Working conditions 1

45% (1.4)

76% (0.8)

42% (0.82)

Working conditions 2

77% (0.57)

84% (0.51)

74% (0.33)

Working conditions 3

69% (0.76)

81% (0.61)

44% (0.73)

Working conditions 4

72% (0.7)

85% (0.5)

58% (0.55)

Damping effect of dampers under different working conditions (PGA = 0.4 g)

 Floor 3 story drift damping effect % (displacement / mm)

Original framework

(4.42)

(3.44)

(2.29)

Working conditions 1

51% (2.14)

57% (1.49)

58% (1.19)

Working conditions 2

60% (1.75)

77% (0.79)

79% (0.58)

Working conditions 3

70% (1.31)

64% (1.23)

58% (0.95)

Working conditions 4

71% (1.28)

69% (1.07)

65% (0.93)

Damping effect of dampers under different working conditions (PGA = 0.8 g)

 Floor 3 story drift damping effect % (displacement / mm)

Original framework

(6.83)

(5.59)

(5.26)

Working conditions 1

53% (3.21)

47% (2.95)

54% (2.39)

Working conditions 2

67% (2.22)

65% (1.95)

67% (1.72)

Working conditions 3

65% (2.37)

55% (2.51)

57% (2.24)

Working conditions 4

66% (2.35)

58% (2.36)

58% (2.17)

Damping effect of dampers under different working conditions (PGA = 1.0 g)

 Floor 3 story drift damping effect % (displacement / mm)

Original framework

(6.93)

(4.87)

(6.93)

Working conditions 1

59% (2.82)

52% (2.34)

53% (3.24)

Working conditions 2

62% (2.63)

48% (2.53)

65% (2.45)

Working conditions 3

68% (2.19)

36% (3.10)

60% (2.78)

Working conditions 4

63% (2.53)

57% (2.07)

55% (3.12)