A numerical approach for default detection in beam-like structures using modal strain energy
- Autores: Carlos Alberto Riveros, Edwin Fabián García Aristizábal, Manuel Alonso Builes
- Localización: Revista EIA, ISSN-e 1794-1237, Vol. 7, Nº. 13, 2010, págs. 171-184
- Idioma: español
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Resumen
Vibration-based damage detection is based on the fact that measurements of changes in the vibration properties of a structure can be used to determine the occurrence of structural damage. Therefore, there is a strong need for the development and implementation of fault detection and optimum sensor location methods that address the issue of limited instrumentation and its effect in predicting damage degradation. In this paper, the results of a numerical implementation of a previously developed sensor distribution method are presented. A finite element model of a railway box-girder bridge is assembled. Then, the damage index method is numerically implemented in order to identify damage from the resulting sensor measurements. Both the optimum sensor placement and the damage detection methods are based on the concept of modal strain energy. Finally, the numerical results show that the proposed approach is suitable for continuous damage monitoring implementations and can be used as a useful tool for damage assessment in beam-like structures.
