An Overview: The Application of Vibration-Based Techniques in Bridge Structural Health Monitoring

Abstract

Structural health monitoring (SHM) systems have been developed to evaluate structural responses to extreme events such as natural and man-made hazards. Additionally, the increasing volume of users and vehicle sizes can lead to the sudden damage and collapse of bridge structures. Hence, structural monitoring and dynamic characteristic analyses of bridge structures are critical and fundamental requirements for bridge safety. SHM can overcome the weaknesses of visual inspection practices, such as lack of resolution. However, because of computational limitations and the lack of data analysis methods, substantial quantities of SHM data have been poorly interpreted. In this paper, the SHM of bridges based on dynamic characteristics is used to assess the "health state" of bridge structures. A comprehensive SHM system using vibration-based techniques and modal identification for bridge structures are well defined. Some advanced concepts and applications regarding bridge safety evaluation methods, including damage detection and load-carrying capacity, are reviewed. For the first time, the pros and cons of each vibration technique are comprehensively evaluated, providing an advantage to the authority or structural owner when developing a bridge management database. This information can then be used for continuous structural monitoring to access and predict the bridge structure condition.

Dynamic Response Analysis of Simply Supported Bridge through Experimental and Numerical Modelling Approaches

“…During analysis, the vibration data is converted from the time domain to the frequency domain using Fast Fourier Transformation (FFT), developed by James Cooly and John in 1965 (Lynch et al, 2007). It is popularly used to analyse structural dynamics in modern days (Saidin et al, 2022;Peeters et al, 1998). The transformed data is further analysed to obtain modal parameters, such as, mode shape, dominant frequency and natural frequency (Aulakh et al, 2021;Saidin et al, 2022).…”

Online Real-Time Monitoring System of A Structural Steel Railway Bridge Using Wireless Smart Sensors

“…Compared to the deformation from the numerical simulation results, the deformation does not show a significant difference. The deformation resulting from numerical simulation calculations is 50.580 mm and appears in the middle of the span [45]. This deflection occurs due to the loading of the RM 1921 load.…”

“…SHMS has utilized the advancement of new sensing technologies over the past few decades [27]- [35]. Because of the advantages and tremendous benefits for applications that demand access to civil engineering structures, wireless approaches have been frequently used for SHMS [36]- [45].…”

Review and application of operational modal analysis methods in the frequency domain

“…Dinamičko ponašanje konstrukcije može se u potpunosti definirati s tri parametra -vlastita frekvencija, modalni oblici i prigušenje [1]. Navedeni parametri još se nazivaju modalnim parametrima, a primjenu nalaze u različitim područjima građevinarstva -od projektiranja (validacije projektirane konstrukcije [2], procjene djelovanja na konstrukciju [2,3], kalibracije numeričkih modela [5]) do održavanja građevina (monitoring konstrukcija [5,6]). Vlastite frekvencije i modalni oblici najčešće se određuju iz numeričkih modela konstrukcija, dok se koeficijenti prigušenja, u pravilu, određuju empirijski ili eksperimentalno.…”