Research Article
Prestress Force Identification for Externally Prestressed Concrete Beam Based on Frequency Equation and Measured Frequencies
Table 4
The corrected result of material parameters and frequencies.
| | | Material parameter | Frequency result (HZ) of (47) | Error (%) | | | Elastic modulus (Mpa) | Density (kg/m3) | Mode 1 | Mode 2 | Mode 3 | Mode 1 | Mode 2 | Mode 3 |
| | Uncorrected | 2.550 × 10 | 2500 | 30.494 | 47.271 | 119.897 | 2.30 | 4.02 | 4.79 | | Corrected | 2.639 × 10 | 2591 | 29.832 | 45.527 | 114.797 | 0.08 | 0.18 | 0.33 |
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