Malekjafarian, AbdollahAbdollahMalekjafarianO'Brien, Eugene J.Eugene J.O'Brien2015-09-082015-09-082014 Elsev2014-12-15Engineering Structureshttp://hdl.handle.net/10197/6931This paper processes the signals from accelerometers mounted on a vehicle travelling over a bridge. Short Time Frequency Domain Decomposition (STFDD) is used to estimate bridge mode shapes from the dynamic response of the vehicle. In Frequency Domain Decomposition (FDD), several segments are defined on the bridge and the measurement is performed using two instrumented axles. Here, the FDD method is employed in a multi-stage procedure applied to the bridge segments in sequence. A rescaling process is used to construct the global mode shape vector. The performance of the proposed method is validated using numerical case studies. In other indirect bridge identification methods, the road profile may excite the vehicle, making it difficult to detect the bridge modes. This is addressed using two concepts: applying external excitation to the bridge and subtracting signals in the axles of successive trailers towed by the vehicle. The results obtained from the numerical investigation demonstrate that the proposed method can estimate the bridge mode shapes with acceptable accuracy. Sensitivity of the method to added white noise is also investigated.enThis is the author’s version of a work that was accepted for publication in Engineering Structures. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Engineering Structures (VOL 81, ISSUE 2014, (2015)) DOI: 10.1016/j.engstruct.2014.10.007Vehicle bridge interactionFrequency Domain DecompositionBridgeMode shapeIndirectIdentificationSHMDamage detectionFDDVBIJournal Article8138639710.1016/j.engstruct.2014.10.0072015-08-20https://creativecommons.org/licenses/by-nc-nd/3.0/ie/