Journal article
Experimental Vibration Analysis for Structural Identification of a Long-Span Suspension Bridge
Journal of engineering mechanics, v 139(6), pp 748-759
01 Jun 2013
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Structural identification (St-Id) of long-span bridges by ambient vibration testing provides a starting point for quantitatively characterizing the actual in-service mechanical characteristics and behaviors of these complex constructed systems. However, various uncertainties involved in the experimental and identification processes impact the reliability of St-Id, especially if vibration testing is the sole experiment. Such uncertainties represent perhaps the most fundamental barrier to more widespread applications of measurements in civil engineering practice. The goal of this paper is to leverage a vibration test of a long-span suspension bridge to illustrate a number of possible strategies for coping with the uncertainties confronted when identifying the dynamic characteristics of large-scale constructed systems. The design and implementation of a field test in the context of St-Id are first presented to illustrate how uncertainties can be mitigated by following a disciplined approach to designing the experiment. Next, data preprocessing strategies including data inspection, time window selection, band-pass filtering, averaging, and windowing are proposed to reduce data errors. Three separate postprocessing methods, including Peak Picking, PolyMAX, and Complex Mode Indicator Function, are executed independently to verify the reliability of the data processing results. Experimental results for both the towers and suspended spans are correlated with simulations from three-dimensional finite-element analysis of the long-span bridge for St-Id.
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Details
- Title
- Experimental Vibration Analysis for Structural Identification of a Long-Span Suspension Bridge
- Creators
- J. Zhang - Southeast UniversityJ. Prader - Drexel University, Civil, Architectural, and Environmental EngineeringK. A. Grimmelsman - University of Arkansas at FayettevilleF. Moon - Drexel University, Civil, Architectural, and Environmental EngineeringA. E. Aktan - Drexel University, Civil, Architectural, and Environmental EngineeringA. Shama - Parsons
- Publication Details
- Journal of engineering mechanics, v 139(6), pp 748-759
- Publisher
- Asce-Amer Soc Civil Engineers
- Number of pages
- 12
- Grant note
- 51108076 / National Science Foundation of China; National Natural Science Foundation of China (NSFC)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Civil, Architectural, and Environmental Engineering
- Web of Science ID
- WOS:000318569600008
- Scopus ID
- 2-s2.0-84881302484
- Other Identifier
- 991019168043804721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Engineering, Mechanical