Table 6 Summary of OMA applications for bridge monitoring
From: An Overview: The Application of Vibration-Based Techniques in Bridge Structural Health Monitoring
Application | OMA method(s) | Result | References |
|---|---|---|---|
Scaled reinforced box girder concrete bridge model | EFDD and SSI | The natural frequencies and mode shapes obtained from all measurements using EFDD and SSI methods are similar to each other. The modal assurance criterion (MAC) values for both EFDD and SSI are between 90–100% | Altunişik et al., (2012) |
Long cable-stayed bridge | P-LSCF, ERA/NExT, and SSI-COV | There are no systematic differences between frequency values for all three techniques. Among the three techniques, SSI-COV appears to be the most effective of the three methods at detecting all modes (with one possible exception). The next best approach is NExT/ERA, although the damping estimates are the highest of the techniques | Brownjohn et al., (2010) |
Long-span concrete arch bridge | FDD | Enabling the tracking of the bridge’s first 12 natural frequencies | Magalhães et al., (2008) |
Arch bridge | Peak picking and SSI | Natural frequencies obtained from modal analysis were used for updating the FE model. The differences between the natural frequencies are reduced from 27 to 3% | Bayraktar et al., (2009) |
Integral abutment highway bridge | Peak picking, FDD, and SSI | The mode shapes acquired using SSI were judged to be of better quality than those produced through FDD | Whelan et al., (2009) |
Double-deck steel-arch bridge | Peak picking | Natural frequencies recorded from the modal analysis have changed significantly, with a minor tendency to increase after bridge rehabilitation | Costa et al., (2014) |
125 m long with three spans concrete deck bridge | EFDD | MI was used to update the FE model, and the result obtained was used to evaluate the bridge's seismic performance in line with the 2015 Canadian Highway Bridge Design Code | Feng et al., (2016) |
FRP (fibre-reinforced polymer) bridges | Eigensystem realisation algorithm (ERA) | Results of the MI give useful information about the dynamic characteristics of structures | Casalegno and Russo, (2017) |
Cable-stayed bridge | SSI-COV | Accurate and robust MI results are obtained when the automated OMA algorithm is applied to a cable-stayed bridge structure | Sun et al., (2017) |
An 11-span concrete bridge | Peak picking, FDD and SSI-DD | The PP technique was the most effective in terms of discovering the largest number of frequencies, while the SSI method produced the best quality mode shapes | Chen et al., (2017) |
SHM of the pedestrian bridge | FDD | A good agreement was found between the FE method and system identification results | Ali et al., (2019) |