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Proceedings Paper

Dynamic behaviors of historical wrought iron truss bridges: a field testing case study
Author(s): Kaoshan Dai; Ying Wang; Andrew Hedric; Zhenhua Huang
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Paper Abstract

The U.S. transportation infrastructure has many wrought iron truss bridges that are more than a century old and still remain in use. Understanding the structural properties and identifying the health conditions of these historical bridges are essential to deciding the maintenance or rebuild plan of the bridges. This research involved an on-site full-scale system identification test case study on the historical Old Alton Bridge (a wrought iron truss bridge built in 1884 in Denton, Texas) using a wireless sensor network. The study results demonstrate a practical and convenient experimental system identification method for historical bridge structures. The method includes the basic steps of the in-situ experiment and in-house data analysis. Various excitation methods are studied for field testing, including ambient vibration by wind load, forced vibration by human jumping load, and forced vibration by human pulling load. Structural responses of the bridge under these different excitation approaches were analyzed and compared with numerical analysis results.

Paper Details

Date Published: 8 April 2016
PDF: 8 pages
Proc. SPIE 9804, Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, and Civil Infrastructure 2016, 98040F (8 April 2016); doi: 10.1117/12.2218744
Show Author Affiliations
Kaoshan Dai, Tongji Univ. (China)
Ying Wang, Tongji Univ. (China)
Andrew Hedric, Univ. of North Texas (United States)
Zhenhua Huang, Univ. of North Texas (United States)


Published in SPIE Proceedings Vol. 9804:
Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, and Civil Infrastructure 2016
Tzuyang Yu; Andrew L. Gyekenyesi; Peter J. Shull; H. Felix Wu, Editor(s)

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