Fig. 1. Experimental platform for force-sensitive performance detection of the wFBG

Fig. 2. Schematic diagram of installation of the wFBG

Fig. 3. Variation curve of the change of wFBG center wavelength with strain during the loading process

Fig. 4. Variation curve of the change of wFBG center wavelength with strain during the unloading process

Fig. 5. Schematic diagram of section of 1.5 m simply supported T beam

Fig. 6. Schematic diagram of cross section points of 1.5 m simply supported T beam

Fig. 7. Strain-time relationship diagram of the wFBG at the top of 1.5 m simply supported T beam

Fig. 8. Strain-time relationship diagram of the wFBG at the bottom of 1.5 m simply supported T beam

Fig. 9. Strain-time relationship diagram of the wFBG of the section 2 of 1.5 m simply supported T-beam. (a) Left side of section 2; (b) right side of section 2

Fig. 10. Schematic diagram of section of 4.5 m continuous T beam

Fig. 11. Schematic diagram of cross section points of 4.5 m continuous T beam

Fig. 12. Strain-time relationship diagram of the wFBG on the left side of the top of 4.5 m continuous T beam

Fig. 13. Strain-time relationship diagram of the wFBG on the right side of the bottom of 4.5 m continuous T beam

Fig. 14. Strain-time relationship diagram of the wFBG of the section 4 of 4.5 m continuous T beam. (a) Left side of section 4; (b) right side of section 4

Fig. 15. Schematic diagram of section of 9.5 m variable cross section continuous T beam

Fig. 16. Schematic diagram of cross section points of 9.5 m variable cross section continuous T beam

Fig. 17. Strain-time relationship diagram of the wFBG on the left side of the top of 9.5 m variable cross section continuous T beam. (a) Section of 9.5 m beam with equal height section; (b) section of 9.5 m beam with variable height section and mid fulcrum

Fig. 18. Strain-time relationship diagram of the wFBG on the right side of the bottom of 9.5 m variable cross section continuous T beam. (a) Section of 9.5 m beam with equal height section; (b) section of 9.5 m beam with variable height section

Fig. 19. Time-strain relationship diagram of wFBG No. 1 of 10 sections. (a) Section 1-3, 8-10; (b) section 4-7

Fig. 20. Time-strain relationship diagram of part of wFBG in 10 sections. (a) Section 1-3, 8-10; (b) section 4-7