Detección y localización de daño en secciones prismáticas utilizando metodologías de correlación basadas en parámetros dinámicos
Throughout this study, a method for damage detection and localization in a twodimensional system to metallic structures is proposed through the Damage Localization Criterion by frequencies analysis (CLDF), in order to reduce costs and avoid the implementation of invasive methods in buildings. Likewi...
- Autores:
-
Hernández Segura, Luis Carlos
- Tipo de recurso:
- Work document
- Fecha de publicación:
- 2020
- Institución:
- Universidad Nacional de Colombia
- Repositorio:
- Universidad Nacional de Colombia
- Idioma:
- spa
- OAI Identifier:
- oai:repositorio.unal.edu.co:unal/77873
- Acceso en línea:
- https://repositorio.unal.edu.co/handle/unal/77873
- Palabra clave:
- detección de daño
metodología de detección
amenaza sísmica
frecuencias Naturales
damage detection
detection methodology
seismic hazard
natural frequencies
- Rights
- openAccess
- License
- Atribución-NoComercial 4.0 Internacional
| Summary: | Throughout this study, a method for damage detection and localization in a twodimensional system to metallic structures is proposed through the Damage Localization Criterion by frequencies analysis (CLDF), in order to reduce costs and avoid the implementation of invasive methods in buildings. Likewise, it seeks to preserve the qualified inspector’s integrity at the time of an aftershock appearance in buildings with structural deficiencies; and finally, to reduce the evaluation time of the current services conditions and functionality of the structures. The methodology is based on the natural frequencies analysis of structures. It contemplates three approaches: the theoretical analysis of the variation of eigenvalues due to simulation of damage in the structure using the finite element method; the experimental scale analysis of the selected problem situation; and the analysis of the variability of the results obtained by experimental tests and the ones obtained with theoretical tests. To evaluate the efficiency of the proposed method, two models are analyzed: a cantilever beam scale model without damage and a beam model with induced damage, with the same geometric and mechanical characteristics of the health beam. The specimen is subjected to forced vibration, where the natural frequencies of the structure are obtained using a spectral analysis of the accelerations signals, to finally be implemented the CLDF method between the computational models and the experimental measurements, in order to detect the geometrical variations simulated as structural damage. In addition, Through the analysis process, a numerical model will be available on order to validate the procedures of data acquisition. |
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