System identification of suspension bridge from ambient vibration response

Long-term monitoring and data analysis of the Tamar Bridge

“…The response of a long span bridge to high and low wind speeds was investigated in [6], where it was concluded that the modal frequencies decreased with increased response amplitude levels directly caused by increased wind speed. The effect of traffic loading has also been addressed in [7], where, for long span bridges, the influence of traffic loading on the structure's frequency was considered negligible due to the fact that the mass of a single vehicle is very small in comparison to the mass of the 'superstructure'.…”

“…This suggests that wind speed is not a dominant factor in determining how the frequencies vary. High wind speeds, however, have previously been found to have an influence on the dynamic characteristics of long span bridges [6], this will be taken into account later on in the analysis, when the effect of the deck acceleration is addressed.…”

Damage Detection in Large Structures Using Modes Shapes and Its Derivatives

“…Chiang et al [15] developed a modified form of ERA for modal parameter identification using ambient data. NExT-ERA has also been applied as an output-only technique for health monitoring as well as damage detection of suspension bridges [16] simulated IASC-ASCE benchmark building [17], etc  Random Decrement Technique (RDT) is a popular method to extract the free vibration response from structural ambient response. Ibrahim [18] proposed this time domain technique to extract free vibration response of a structure from its ambient response.…”

Explaining operational modal analysis with data from an arch bridge

“…Now, it is relevant to point out some works with recent and interesting applications. In [47], it is described the ambient vibration test of the Humber Bridge, the largest suspension bridge in the United Kingdom; Siringoringo and Fujino [48] describe the processing of a database collected in a suspension bridge in Japan (Hakucho Bridge); in [49] several relevant applications on bridges and other special structures are presented; in [50], it is demonstrated the usefulness of ambient vibration tests in the context of the implementation of vibration control devices; Pakzad and Fences [51] present the results obtained with an ambient vibration test performed on the Golden Gate Bridge with wireless sensors; Carne and James III [52] describe the use of OMA in wind turbines testing; reference [53] characterizes the monitoring of historical masonry structures, taking profit from OMA.…”