A case study of damage detection in four-bays steel structures using the HHT approach

Autor: Dung Jiang Chiou, Wen Ko Hsu, Cheng Wu Chen, Pei Chiung Huang, Ming Yi Liu, Wei-Ling Chiang
Rok vydání: 2014
Předmět:
Zdroj: Smart Structures and Systems. 14:595-615
ISSN: 1738-1584
DOI: 10.12989/sss.2014.14.4.595
Popis: This study aims to investigate the relationship between structural damage and sensitivity indices using the Hilbert-Huang transform (HHT) method. Two damage detection indices are proposed: the ratio of bandwidth (RB), and the ratio of effective stiffness (RES). The nonlinear four bays multiple degree of freedom models with various predominant frequencies are constructed using the SAP2000 program. Adjusted PGA earthquake data (Japan 311, Chi-Chi 921) are used as the excitations. Next, the damage detection indices obtained using the HHT and the fast Fourier transform (FFT) methods are evaluated based on the acceleration responses of the structures to earthquakes. Simulation results indicate that, the column of the 1st floor is the first yielding position and the RB value is changed when the RES
Databáze: OpenAIRE