Damage Detection Of A Bridge Model Based On Operational Dynamic Strain Measurements

Keywords

Damage detection; Operating deflection shape; Operational modal analysis; Strain measurement and analysis; Strain modes

Abstract

Vibration data analysis reserves a significant place in structural health monitoring practice since it can be employed for certain engineering problems such as locating damage and assessing damage severity by means of vibration signature interpretation. In this study, a damage detection study is carried out in light of vibration data analysis methods on a four-span bridge model by exploiting strain measurements. The concept of strain operating deflection shape along with an extraction method based on frequency and spatial domain decomposition is proposed. The damage-induced state of the bridge model is compared with the baseline state to detect and locate the damage. The result of strain analysis is also compared with acceleration analysis by simultaneous measurements of strain and acceleration. The power spectrum matrix of responses is estimated using digital signal processing principles. Besides the operating deflection shape analysis, operational modal analysis and correlation analysis of strain modes are conducted to identify and locate the damage.

Publication Date

9-1-2016

Publication Title

Advances in Structural Engineering

Volume

19

Issue

9

Number of Pages

1379-1389

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1177/1369433216643583

Socpus ID

84993999411 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84993999411

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