Research Article
Assessing the Difference in Measuring Bolt Stress: A Comparison of Two Optical Fiber Sensing Techniques
Table 1
Mechanical parameters of bolt, resin, and concrete.
| | Properties | Density (kg/m3) | Bulk modulus (GPa) | Shear modulus (GPa) | Cohesion (MPa) | Internal friction angle (°) | Tensile strength (MPa) |
| | Bolt | 7900 | 157 | 75 | — | — | — | | Resin | 2000 | 5.2 | 2.8 | 8.5 | 31 | 5.3 | | Concrete | 3200 | 3.9 | 2.5 | 3.7 | 26 | 2.2 |
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