International journal of steel structures (국제강구조저널)

Korean Society of Steel Construction (한국강구조학회)
권호 표지

Global and Local Health Monitoring of Plate-Girder Bridges under Uncertain Temperature Conditions

Kim, Jeong-Tae;Na, Won-Bae;Park, Jae-Hyeong;Hong, Dong-Soo
김정태;나원배;박재형;홍동수

  • Published : 20060000
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Abstract

Even significant damage may cause very small changes in structural characteristics, particularly for large structures. Furthermore,driven variability on a combined structural health monitoring (SHM) system is examined in a model plate-girder bridge. Thecombined SHM system consists of global vibration-based technique and local electro-mechanical impedance (EMI) basedtechnique. First, dynamic modal parameters of the test structure are measured before and after the occurrence of flexural cracksat various temperatures. Also, EMI signatures are sensed before and after the changes in support systems at various.Damage-induced changes in the signals are distinguished from temperature-driven uncertainty. The efect of temperaturevariability is also assessed to estimate the accuracy of damage detection.

Keywords

References

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