Abstract
This paper presents a simple method for preliminary structural assessment of bridges located in the province of British Columbia, Canada, using ambient vibration testing. The method is applied to bridges that have been hit by trucks or showed deterioration in some elements caused by bad construction and aging. The Earthquake Engineering Research Facility at The University of British Columbia, UBC-EERF, carried out a testing campaign of these bridges in December 2008. The bridges were tested along the deck taking measurements at 100 locations approximately. The damage criteria was based on identification of modal properties (mode shapes, frequencies and damping) and evaluation of maximum vertical displacements of the deck under normal traffic load conditions. The results show that the proposed approach can be used for preliminary evaluation of the structural integrity of the type of bridges investigated.
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