Research on Force Direction and Deflection of Anchor Rod Based on Fiber Bragg Grating Sensing Technology

To study the tangential deformation of anchor bolt after anchoring, the strain value is obtained by the wavelength change of fiber bragg grating sensor after anchoring. The stress angle and deflection of anchor bolt are calculated by mathematical difference method and trigonometric function operation. In this paper, the tangential load of the bolt is obtained by a new method, which provides a new idea for the bolt not to be directly measured after anchoring.