Development of Finished Fiber-Optic Grating Type Steel Strand Ties

Fig. 3. Fiber grating wavelength change and load relationship. (a) Z1-wavelength change versus load curve; (b) M1,M2-wavelength change versus load curve; (c) M3,M4-wavelength change versus load curve

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Fig. 4. Steel strand ties anchoring system

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Fig. 5. Steel strand ties. (a) Anchoring system; (b) bar arrangement method

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Fig. 6. High-speed impact tester. (a) Overall tester; (b) tensile area of tester

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Fig. 7. Static load test time - load curve

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Fig. 8. Tension cable axial strain curves. (a) 1# steel strand; (b) 2# steel strand; (c) 3# steel strand

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Table 1. Mechanical properties of materials
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Table 1. Mechanical properties of materials
Material Modulus of elasticity /GPa Poisson’s ratio Tensile ultimate strength /MPa Ultimate elongation /%
Anchor cup 210.00 0.30 — —
Steel strand ties 195.00 0.30 1932.14 6.5
Cold cast body 2.27 0.27 68.88 —

Table 2. Specimen tensile test results
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Table 2. Specimen tensile test results
Test piece Theoretical tensile load capacity /kN Measured maximum load capacity /kN Anchorage efficiency factor
1 811.5 790 0.97
2 811.5 834 1.03
3 811.5 840 1.04

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Wencheng Yu, Wei Ou, Wanxu Zhu, Yun Lei, Quanxi Shen. Development of Finished Fiber-Optic Grating Type Steel Strand Ties[J]. Laser & Optoelectronics Progress, 2024, 61(15): 1506001

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