Timber bridge evaluation: A global nondestructive approach using impact generated FRFs

Angus Morison, C. D. VanKarsen, H. A. Evensen, J. B. Ligon, J. R. Erickson, R. J. Ross, J. W. Forsman

Research output: Contribution to journalConference articlepeer-review

2 Scopus citations


Bridges require periodic inspections to ensure the safety of those using the structure. A visual inspection has historically been the most common form of investigation for timber bridges. This poses many problems when inspecting bridge timbers since often the damage is internal, leaving no visible signs of decay on the surface. Localized nondestructive evaluation (NDE) techniques have been developed to allow assessment of the internal parts of timber structural members. Testing an entire structure in this manner can be tedious and time consuming. Steel structures have long been tested from a global perspective, basing the assessment of health of the structure on modal parameters, This paper presents an effort to extend global testing methods, specifically impact testing, to timber bridges.

Original languageEnglish (US)
Pages (from-to)1567-1573
Number of pages7
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume4753 II
StatePublished - Jan 1 2002
EventProceedings of IMAC-XX: A Conference on Structural Dynamics - Los Angeles, CA, United States
Duration: Feb 4 2002Feb 7 2002


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