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Table 13 Strength degradation coefficient of specimens in control group IV.

From: Experimental Evaluation of Effect Factors on Seismic Performance of Concrete Columns Reinforced with HTRB630 High-Strength Steel Bars

Specimen

Δ/Δy

λ

Specimen

Δ/Δy

λ

Cycle 1

Cycle 2

Cycle 3

Cycle 1

Cycle 2

Cycle 3

T45-2 (HRB400)

2.59

1.000

0.984

0.968

T45-5 (HTRB630)

2.14

1.000

0.987

0.985

3.46

1.000

0.987

0.973

2.86

1.000

0.994

0.991

4.32

1.000

0.979

3.57

1.000

0.991

0.982

    

4.29

1.000

0.988

T60-1 (HRB400)

2.74

1.000

0.983

0.977

T60-3 (HTRB630)

1.70

1.000

0.992

0.991

3.65

1.000

0.980

0.972

2.26

1.000

0.987

0.977

4.57

1.000

0.989

2.83

1.000

0.988