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Table 3 Force–drift capacity of the columns

From: Effect of the concrete cover thickness ratio on the post-yield stiffness of bridge columns with partially unbonded unstressed steel strands

Column

Loading direction

\(D_{y}\)

(%)

\(P_{y}\)

(tf)

\(D_{p}\)

(%)

\(P_{p}\)

(tf)

\(D_{u}\)

(tf)

\(P_{u}\)

(tf)

\(k_{i}\)

(tf/m)

\(k_{{2}}\)

(tf/m)

\(\alpha\)

(%)

CCC

 + 

0.80

35.3

1.83

36.0

5.70

34.8

1444

-3

-0.2

-0.3 (avg.)

-

-0.80

-35.1

-1.73

-35.2

-5.82

-34.3

1436

-6

-0.4

CSC40

 + 

0.89

38.0

4.96

42.6

4.96

42.6

1405

37

2.6

2.1 (avg.)

-

-1.01

-38.2

-1.99

-41.3

-4.95

-40.5

1240

19

1.5

CSC30

 + 

1.16

39.1

4.94

41.2

4.94

41.2

1125

25

2.2

3.9 (avg.)

-

-1.13

-37.8

-4.94

-45.0

-4.94

-45.0

1100

62

5.7

CSC20

 + 

0.99

36.8

4.66

43.4

4.66

43.4

1216

60

4.9

6.4 (avg.)

-

-0.97

-34.2

-4.87

-45.1

-4.87

-45.1

1156

91

7.9