The sensibility factor is 30.5 and 38.6 respectively,13.80 and 17.47 times as that of strain gauge for the diameter of 4 and 6 mm respectively. The electrical resistance change of CFRP bar is caused by resistivity change.

• 当CFRP筋破坏时其电阻变化率为31%25-64%25；直径4 mm和6 mm的CFRP筋应变敏感系数分别是30.；5和38