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Table 5 Impact of design period (T) on stage design strength ratio using Caltrans design method
Stage period (t), years | DS(t,T), (%) | ΔDS(t,T), (%) | |||
|---|---|---|---|---|---|
DS(t,30) | DS(t,25) | DS(t,20) | ΔDS(t,30) | ΔDS(t,25) | |
0.0 | 100.00 | 100.00 | 100.00 | 0 | 0 |
0.5 | 43.04 | 40.99 | 38.58 | 11.56 | 6.25 |
1.0 | 38.07 | 35.84 | 33.23 | 14.56 | 7.85 |
2.0 | 32.59 | 30.16 | 27.31 | 19.33 | 10.44 |
4.0 | 26.44 | 23.79 | 20.69 | 27.79 | 14.98 |
6.0 | 22.43 | 19.64 | 16.36 | 37.10 | 20.05 |
8.0 | 19.34 | 16.43 | 13.03 | 48.43 | 26.09 |
10.0 | 16.76 | 13.76 | 10.24 | 63.67 | 34.34 |
12.0 | 14.51 | 11.42 | 7.82 | 85.55 | 46.04 |
14.0 | 12.48 | 9.33 | 5.63 | 121.67 | 65.72 |
16.0 | 10.62 | 7.40 | 3.63 | 192.56 | 103.86 |
18.0 | 8.89 | 5.61 | 1.76 | 405.11 | 218.75 |
20.0 | 7.26 | 3.91 | 0.00 | –@ | – |
24.0 | 4.21 | 0.75 | – | – | – |
25.0 | 3.48 | 0.00 | – | – | – |
28.0 | 1.36 | – | – | – | – |
30.0 | 0.00 | – | – | – | – |