Challenges and uncertainty mitigation in structural identification of long span bridges

J. B. Prader, J. Zhang, F. L. Moon, A. E. Aktan

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Using full scale vibration testing as a means for structural identification (St-Id) of long span bridges represents an efficient technique for quantitatively characterizing the in-service mechanical attributes and behaviors of these complex systems. However, there are various uncertainties, known and unknown, involved in the experimental and identification processes that impact the reliability of St-Id and serve as a barrier to its more widespread acceptance and application in engineering practice. A full-scale vibration test on a long-span suspension bridge is taken as an example to illustrate a number of possible approaches for coping with the challenges in practical identification of the dynamic characteristics of large-scale constructed systems. This paper examines uncertainty mechanisms in the following areas: (1) experiment design and implementation, (2) data pre-processing, (3) data post processing and modal parameter estimation. The identification results obtained for the bridge spans and towers demonstrate that the developed field testing and data processing methods may provide a reliable solution for bridge characterization.

Original languageEnglish (US)
Title of host publicationBridge Maintenance, Safety, Management and Life-Cycle Optimization - Proceedings of the 5th International Conference on Bridge Maintenance, Safety and Management
Pages825-834
Number of pages10
StatePublished - 2010
Externally publishedYes
Event5th International Conference on Bridge Maintenance, Safety and Management, IABMAS 2010 - Philadelphia, PA, United States
Duration: Jul 11 2010Jul 15 2010

Publication series

NameBridge Maintenance, Safety, Management and Life-Cycle Optimization - Proceedings of the 5th International Conference on Bridge Maintenance, Safety and Management

Other

Other5th International Conference on Bridge Maintenance, Safety and Management, IABMAS 2010
Country/TerritoryUnited States
CityPhiladelphia, PA
Period7/11/107/15/10

All Science Journal Classification (ASJC) codes

  • Safety, Risk, Reliability and Quality
  • Building and Construction

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