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Title: | Damage assessment of frame structure using quadratic time-frequency distributions |
Authors: | Barai, Sudhir Kumar |
Keywords: | Civil Engineering Damage detection Nonlinear features Frame structure Time-frequency distributions |
Issue Date: | 2014 |
Publisher: | Techno Press |
Abstract: | This paper presents the processing of nonlinear features associated with a damage event by quadratic time-frequency distributions for damage identification in a frame structure. A time-frequency distribution is a function that distributes the total energy of a signal at a particular time and frequency point. As the occurrence of damage often gives rise to non-stationary, nonlinear structural behavior, simultaneous representation of the dynamic response in the time-frequency plane offers valuable insight for damage detection. The applicability of the bilinear time-frequency distributions of the Cohen class is examined for the damage assessment of a frame structure from the simulated acceleration data. It is shown that the changes in instantaneous energy of the dynamic response could be a good damage indicator. Presence and location of damage can be identified using Choi-Williams distribution when damping is ignored. However, in the presence of damping the Page distribution is more effective and offers better readability for structural damage detection. |
URI: | https://www.koreascience.or.kr/article/JAKO201404260596596.page http://dspace.bits-pilani.ac.in:8080/xmlui/handle/123456789/3656 |
Appears in Collections: | Department of Civil Engineering |
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