Journal
STRUCTURE AND INFRASTRUCTURE ENGINEERING
Volume 8, Issue 5, Pages 459-472Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/15732479.2010.539061
Keywords
bridge health monitoring; moving vehicle laboratory experiment; modal parameter identification; autoregressive model; short span bridge; traffic-induced vibration
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Funding
- Japan Society for the Promotion of Science [19656112, 20560443]
- Grants-in-Aid for Scientific Research [20560443, 19656112] Funding Source: KAKEN
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This study is intended to investigate the feasibility of health monitoring of short span bridges based on modal parameter identification using the vibration data of the bridge induced by a moving vehicle. The idea of this study using the traffic-induced vibration of short span bridges which is a kind of non-stationary process is that the modal parameters identified repeatedly under a given moving vehicle provide a pattern which may provide useful information to decide current health condition of bridges. The autoregressive (AR) model is adopted for identifying modal parameters such as frequency and damping characteristics of the bridges. Mode shapes of bridges are obtained using multivariate AR model. Feasibility of the modal parameter identification for health monitoring of short span bridges is observed through a moving vehicle laboratory experiment. Pattern changes of identified parameters are observable by comparing the identification results between intact and damaged girders, which encourages the use of the method for long term health monitoring even for short span bridges.
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