Table 5.
Time-shift factors of both epoxy- and PU-based CFRPs immersed in distilled water.
| CFRP plates | Strain level (%) | Temperature (°C) | Shanghai 17.0 °C a | Tianjin 13.7 °C a | Vancouver 10.3 °C b | Homer 3.5 °C c |
|---|---|---|---|---|---|---|
| Epoxy-based CFRPs | 0 | 20 | 1.2 | 1.5 | 1.9 | 3.1 |
| 60 | 12.0 | 15.0 | 18.9 | 30.7 | ||
| 30 | 20 | 1.2 | 1.4 | 1.8 | 2.7 | |
| 60 | 8.6 | 10.5 | 12.8 | 19.5 | ||
| 58 | 20 | 1.1 | 1.3 | 1.5 | 2.0 | |
| 60 | 4.6 | 5.3 | 6.1 | 8.3 | ||
| PU-based CFRPs | 58 | 20 | 1.1 | 1.3 | 1.5 | 2.1 |
| 60 | 4.9 | 5.7 | 6.6 | 9.0 |
Note: “a”, “b” and “c” represent the annual mean temperatures of corresponding cities which are derived from the respective authoritative organization as follows: “a”: http://www.stats.gov.cn/tjsj/ndsj/2016/indexch.htm (Statistical Data for 2015); “b”: http://www.holiday-weather.com/vancouver/averages/ (accessed 31 October 2017); “c”: https://www.currentresults.com/Weather/Alaska/average-annual-temperatures.php (accessed 31 October 2017).