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EnglishIn the present paper, an application of a dynamic identification process in the frequencies domain, is presented. A steel structure 90 meters long, 22 meters high and simply supported by four pair of concrete piles is considered. The structure has been dynamically loaded by using a mechanical shaker, giving sinusoidal excitation at prescribed frequency values. Experimental modal frequencies, deformations and damping ratios are evaluated starting from inertance function by using the MDOF Circle Fit Method. A finite element model of the structure has been developed and Modal Assurance Criterion (MAC) is, then, used to compare experimental and numerical vibration modes; good correlation is obtained both for global flexural modes, global torsional modes and longitudinal modes.
| Titolo: | Structural identification of a steel structure by forced vibration |
| Autore/i: | MAZZOTTI, CLAUDIO; VINCENZI, LORIS |
| Autore/i Unibo: | |
| Anno: | 2005 |
| Titolo del libro: | ICOSSAR 2005 Conference Proceedings |
| Abstract: | In the present paper, an application of a dynamic identification process in the frequencies domain, is presented. A steel structure 90 meters long, 22 meters high and simply supported by four pair of concrete piles is considered. The structure has been dynamically loaded by using a mechanical shaker, giving sinusoidal excitation at prescribed frequency values. Experimental modal frequencies, deformations and damping ratios are evaluated starting from inertance function by using the MDOF Circle Fit Method. A finite element model of the structure has been developed and Modal Assurance Criterion (MAC) is, then, used to compare experimental and numerical vibration modes; good correlation is obtained both for global flexural modes, global torsional modes and longitudinal modes. |
| Data prodotto definitivo in UGOV: | 13-ott-2005 |
| Appare nelle tipologie: | 4.01 Contributo in Atti di convegno |
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