@article { , title = {Experimental Demonstration of a Mode Shape-Based Scour-Monitoring Method for Multispan Bridges with Shallow Foundations}, abstract = {A vibration-based scour monitoring approach applicable to bridges with multiple simply supported spans on shallow foundations is experimentally investigated in this paper. A monitoring strategy based on the relative changes in pier mode shape amplitudes due to scour is postulated. The first global mode shape of a bridge structure with multiple spans is extracted from acceleration measurements using an output-only approach, Frequency Domain Decomposition (FDD). The relative changes of the pier mode shape amplitudes under scour are then tracked. Here, each pier mode shape value is compared with the mean values of the remaining piers in a process that creates a Mean-Normalised Mode Shape (MNMS). The approach is demonstrated on a scaled model of a bridge with four spans, supported on sprung foundations, where scour is simulated by the replacement of springs with springs of lower stiffness corresponding to a reduction in foundation stiffness. It is shown that at a given ‘scoured’ pier, significant increases in the MNMS value occur, suggesting that the location of the scour can be identified. The magnitude of the MNMS at a given pier also increases with an increase in stiffness loss due to scour. In practice, the approach would work best by carrying out a visual inspection of the bridge to establish the initial health condition at the time of sensor installation. After this initial process, the bridge can be monitored remotely for scour on an ongoing basis.}, doi = {10.1061/(asce)be.1943-5592.0001586}, eissn = {1943-5592}, issn = {1084-0702}, issue = {8}, journal = {Journal of Bridge Engineering}, note = {Once published, remove embargo 0 and add set statement to Additional Information: "This material may be downloaded for personal use only. Any other use requires prior permission of the American Society of Civil Engineers. This material may be found at [URL/link of abstract in the ASCE Library or Civil Engineering Database]."}, publicationstatus = {Published}, publisher = {American Society of Civil Engineers}, url = {https://nottingham-repository.worktribe.com/output/4205536}, volume = {25}, keyword = {Civil and Structural Engineering, Building and Construction}, year = {2020}, author = {Malekjafarian, Abdollah and Kim, Chul-Woo and O'Brien, Eugene and Prendergast, Luke J. and Fitzgerald, Paul and Nakajima, Syunsuke} }