Assessment and evaluation of damage detection method based on modal frequency changes

Hien HoThu; Akira Mita

doi:10.1117/12.2009087

19 April 2013 Assessment and evaluation of damage detection method based on modal frequency changes

Hien HoThu, Akira Mita

Proceedings Volume 8692, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2013; 86923M (2013) https://doi.org/10.1117/12.2009087
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2013, San Diego, California, United States

Abstract

Structural health monitoring (SHM) for evaluating and maintaining structural integrity of a building is a very important research field. This paper proposes the use of squared modal frequencies, to detect damage to individual parts of the structures as well their extent by using a limited number of sensors, as proposed by Mita and Hagiwara¹. This damage assessment method evaluated in numerical simulations of a five-story shear structure and in shake-table tests of a five-story steel model. The damage to the structure was simulated by reducing the stiffness of each floor. The study showed that it is possible to identify, localize, and evaluate the magnitude of the real damage in a multi-story structure from shifts in its natural frequencies.

Citation Download Citation

Hien HoThu and Akira Mita "Assessment and evaluation of damage detection method based on modal frequency changes", Proc. SPIE 8692, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2013, 86923M (19 April 2013); https://doi.org/10.1117/12.2009087

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