Research Article
An Experimental Study of the Feasibility of Identifying the Impact Damages of Reinforced Concrete Piers Using a Modal Frequency Method
| | Specimen no. | Impact times | Drop height (m) | Car quality (kg) | Axial pressure (kN) | Drop hammer quality (kg) | Friction coefficient | Theoretical speed (m/s) | Measured average velocity (m/s) | Speed change rate (%) |
| | Z16-2 | 4 | 6 | 1200 | 250 | 166 | 0.12 | 1.376 | 1.337 | −2.834 | | Z16-3 | 4 | 8 | 1200 | 250 | 166 | 0.12 | 1.589 | 1.513 | −4.783 | | Z20-2 | 4 | 8 | 1200 | 250 | 166 | 0.12 | 1.589 | 1.588 | −0.0629 |
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