Method for detecting fiber strain in fiber concrete

The invention discloses a method for detecting fiber strain in fiber concrete. The method comprises the following steps: step 1, preparing a fiber concrete experiment sample; 2, mounting a fiber concrete experimental sample on the device for detecting the fiber strain in the fiber concrete; step 3, selecting irradiation points on the complete single fiber in the step 1, and collecting Raman spectrums at the corresponding irradiation points; 4, stretching the fiber concrete experiment sample in the step 2; step 5, collecting the Raman spectrum of the complete single fiber in the fiber concrete experiment sample in the step 4; and step 6, processing and analyzing the Raman spectrum signal acquired in the step 5 by a Raman spectrometer to obtain the strain value of the fiber in the fiber concrete experimental sample. According to the invention, the measurement of the high-performance single-fiber micro strain in the concrete is realized, and very accurate measurement data can be obtained. 本发明公开了一种纤维混凝土中纤维应变的检测方法