ABSTRACT
This chapter focuses on the pros and cons of Fiber Bragg Grating (FBG) sensors and strain gauges in the pullout test, which is used to monitor the behavior of GFRP soil nails. A comparison of data measured by FBG sensors and strain gauges has been carried out to find the advantages and disadvantages of FBG sensors and strain gauges in the pullout test of GFRP soil nails. Strain gauges and FBG can be used to monitor the mechanical mechanism of the GFRP soil nail. A FBG is a type of distributed Bragg reflector that can create a periodic variation in the refractive index of the fiber core. FBG was found to have a broad range of applications and it is used with higher efficiency. Some data were obtained through the experiments by using FBG sensors, but some of them do not have accuracy of these data.
