Modal analysis of long span truss bridges

I. E. Harik, C. M. Madasamy, D. Chen, D. Herd

Research output: Contribution to journalConference articlepeer-review


This paper deals with the analytical and ambient vibration testing studies of the US51 and US41 (both northbound and southbound) bridges. These bridges are long span through-truss type steel bridges crossing the Ohio river in Western Kentucky and located in a region that is influenced by the seismically active New Madrid fault. Seismic evaluation is being carried out because these were built in the early 1940's prior to the implementation of stringent seismic design codes and have not yet been subjected to a large earthquake. The present paper includes the description of bridges, field testing under traffic induced vibrations, three dimensional finite element modeling and calibration with the field test. The results will include the natural frequencies and mode shapes from field testing and finite element modeling.

Original languageEnglish
Pages (from-to)1244-1250
Number of pages7
JournalProceedings of the International Modal Analysis Conference - IMAC
StatePublished - 1999
EventProceedings of the 1999 17th International Modal Analysis Conference, IMAC. Part 1 (of 2) - Kissimmee, FL, USA
Duration: Feb 8 1999Feb 11 1999

ASJC Scopus subject areas

  • General Engineering


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