Thermal affects on modal properties and frequency-based damage detection in plate-girder bridges

Jeong-Tae Kim; Chung-Bang Yun; Jae-Hyeong Park

doi:10.1117/12.543571

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29 July 2004 Thermal affects on modal properties and frequency-based damage detection in plate-girder bridges

Jeong-Tae Kim, Chung-Bang Yun, Jae-Hyeong Park

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Proceedings Volume 5391, Smart Structures and Materials 2004: Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems; (2004) https://doi.org/10.1117/12.543571
Event: Smart Structures and Materials, 2004, San Diego, CA, United States

Abstract

The variation of modal properties caused by temperature effects is assessed to correct modal data used for damage detection in plate-girder bridges. First, experiments on model plate-girder bridges are described. Next, the relationship between temperature and natural frequencies is estimated and a set of empirical frequency-correction formula are analyzed for the test structure. Finally, a frequency-based method is used to locate and estimate severity of damage in the test structure using experimental modal data which are adjusted by the frequency-correction formula. Here, local damage in beam-type structures is detected by using measured frequencies and analytical mode shapes.

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Jeong-Tae Kim, Chung-Bang Yun, and Jae-Hyeong Park "Thermal affects on modal properties and frequency-based damage detection in plate-girder bridges", Proc. SPIE 5391, Smart Structures and Materials 2004: Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems, (29 July 2004); https://doi.org/10.1117/12.543571

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