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Characterization of operational vibrations of highway bridges Via Lidar

 Characterization of operational vibrations of highway bridges Via Lidar
Author(s):
Presented at IABSE Congress: Structural Engineering for Future Societal Needs, Ghent, Belgium, 22-24 September 2021, published in , pp. 412-417
DOI: 10.2749/ghent.2021.0412
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During the examination of data obtained from scanning an operational steel girder bridge, local ripples were noted in horizontal elements that were expected to be planar in nature (such as girder f...
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Bibliographic Details

Author(s): (Rowan University, Glassboro, NJ, USA)
Medium: conference paper
Language(s): English
Conference: IABSE Congress: Structural Engineering for Future Societal Needs, Ghent, Belgium, 22-24 September 2021
Published in:
Page(s): 412-417 Total no. of pages: 6
Page(s): 412-417
Total no. of pages: 6
DOI: 10.2749/ghent.2021.0412
Abstract:

During the examination of data obtained from scanning an operational steel girder bridge, local ripples were noted in horizontal elements that were expected to be planar in nature (such as girder flanges). It was hypothesized that these ripples are a result of the bridge vibrating under truck traffic. The objective of this paper is to examine this hypothesis through the use of data obtained from an operating highway bridge together with the use of numerical and physical models. After analyzing the data, by estimating the distance between the peak of these ripples (and translating this into time using the data acquisition metrics) the frequency of the vibrating object can be estimated. For the operating bridge and physical model employed in this research, the natural frequencies were estimated within 2% to 10% and 0,22% to 5%, respectively.

Keywords:
bridge structural health monitoring vibration bridge dynamics LiDAR SHM
Copyright: © 2021 International Association for Bridge and Structural Engineering (IABSE)
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