Table 10. Ratio of maximum horizontal tensile stress to flexural strength during
spring thaw.
FWD
Damage ratio
FWD
Damage ratio
Date
location
Boeing757
MD DC9
Date
location
Boeing757
MD DC9
a. Central Wisconsin Airport
4 Apr
17
0.34
0.37
20 Mar
2
0.29
0.32
7 Apr
17
0.46
0.45
24 Mar
2
0.34
0.38
10 Apr
17
0.42
0.42
27 Mar
2
0.46
0.50
14 Apr
17
0.34
0.36
4 Apr
2
0.56
0.58
17 Apr
17
0.46
0.45
7 Apr
2
0.62
0.62
21 Apr
17
0.46
0.45
10 Apr
2
0.60
0.61
24 Apr
17
0.48
0.46
14 Apr
2
0.64
0.63
24 Mar
19
0.24
0.26
17 Apr
2
0.62
0.62
27 Mar
19
0.36
0.38
21 Apr
2
0.62
0.62
4 Apr
19
0.42
0.42
24 Apr
2
0.63
0.63
7 Apr
19
0.48
0.46
20 Mar
3
0.25
0.27
10 Apr
19
0.45
0.44
24 Mar
3
0.26
0.28
14 Apr
19
0.39
0.40
27 Mar
3
0.27
0.29
17 Apr
19
0.49
0.47
4 Apr
3
0.35
0.35
21 Apr
19
0.44
0.43
7 Apr
3
0.45
0.42
24 Apr
19
0.47
0.45
10 Apr
3
0.30
0.32
14 Apr
3
0.25
0.27
b. Outagamie County Airport
17 Apr
3
0.33
0.34
15 Mar
1
0.52
0.55
21 Apr
3
0.20
0.22
26 Mar
1
0.59
0.60
24 Apr
3
0.25
0.27
29 Mar
1
0.56
0.57
20 Mar
6
0.25
0.26
5 Apr
1
0.00
0.61
24 Mar
6
0.32
0.35
9 Apr
1
0.64
0.63
27 Mar
6
0.49
0.52
12 Apr
1
0.58
0.59
4 Apr
6
0.50
0.53
16 Apr
1
0.63
0.63
7 Apr
6
0.60
0.60
23 Apr
1
0.48
0.51
10 Apr
6
0.58
0.59
26 Apr
1
0.61
0.61
14 Apr
6
0.63
0.62
15 Mar
4
0.55
0.60
17 Apr
6
0.66
0.65
26 Mar
4
0.78
0.83
21 Apr
6
0.61
0.61
29 Mar
4
0.92
0.94
24 Apr
6
0.58
0.59
5 Apr
4
--
1.00
20 Mar
9
0.25
0.27
9 Apr
4
0.99
0.98
24 Mar
9
0.38
0.41
12 Apr
4
0.97
0.97
27 Mar
9
0.55
0.57
16 Apr
4
1.00
0.99
4 Apr
9
0.53
0.55
23 Apr
4
0.97
0.97
7 Apr
9
0.67
0.65
26 Apr
4
0.94
--
10 Apr
9
0.61
0.61
15 Mar
9
0.64
0.70
14 Apr
9
0.55
0.57
26-Mar
9
0.81
0.86
17 Apr
9
0.63
0.63
29 Mar
9
0.97
0.97
21 Apr
9
0.62
0.62
5 Apr
9
0.95
0.95
24 Apr
9
0.61
0.61
9 Apr
9
0.85
0.88
18 Mar
16
0.22
0.24
12 Apr
9
0.78
0.83
24 Mar
16
0.24
0.26
16 Apr
9
0.84
0.87
27 Mar
16
0.48
0.46
23 Apr
9
0.84
0.87
4 Apr
16
0.37
0.39
26 Apr
9
0.85
0.88
7 Apr
16
0.46
0.45
15 Mar
23
0.79
0.87
10 Apr
16
0.51
0.48
26 Mar
23
0.80
0.88
14 Apr
16
0.46
0.45
29 Mar
23
0.91
0.99
17 Apr
16
0.41
0.42
4 Apr
23
0.96
1.04
21 Apr
16
0.39
0.40
9 Apr
23
0.99
1.06
24 Apr
16
0.39
0.40
12 Apr
23
1.00
1.07
18 Mar
17
0.23
0.26
16 Apr
23
0.97
1.04
24 Mar
17
0.20
0.22
23 Apr
23
0.90
0.97
27 Mar
17
0.30
0.33
26 Apr
23
0.96
1.03
26
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