Modal tracking under large environmental influence

• Tipo: Artigo em Revista Científica Internacional
• Data: 2021

Autores

Sérgio Pereira (Autor) FEUP; Magalhaes, F (Autor) Outra; Gomes, JP (Autor) Outra; Cunha, A. (Autor) FEUP

Revista

Título: Journal of Civil Structural Health Monitoring

Vol. 12

Páginas: 179-190

ISSN: 2190-5452

Editora: Springer Nature

Indexação

ISI Web of Knowledge - 1 Citação

Scopus - 2 Citações

Outras Informações

ID Authenticus: P-00V-NBR

DOI: 10.1007/s13349-021-00536-2

Abstract (EN): The installation of vibration-based structural health-monitoring systems relying in the study of natural frequencies to assess the condition of civil engineering structures is becoming more and more common. The extraction of these monitoring features can be achieved through automated operational modal analysis, combining output-only identification methods with cluster analyses, and comparing the identified modal properties with references, in a process known as modal tracking. However, changing environmental and operational conditions affect the dynamic behaviour of structures, disturbing the process of modal tracking, which may lead to the loss of important information and to misidentifications. In this context, this paper proposes a new methodology for modal tracking within the scope of automated operational modal analysis, especially prepared for scenarios with strong external influence on modal properties. A concrete arch dam with large variations of some natural frequencies is used as case study, and the proposed methodology is compared to a standard procedure using a quite unique monitoring data set continuously collected for 3 years.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 12