PSI - Issue 52

Govardhan Polepally et al. / Procedia Structural Integrity 52 (2024) 280–292 Govardhan Polepally/ Structural Integrity Procedia 00 (2019) 000 – 000

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6. Conclusions Assessing the current condition of masonry bridges is of utmost importance in order to ensure their structural safety when subjected to the existing traffic loads and speeds. However, this task has posed significant challenges for the engineering community. Fortunately, recent advancements in electrical and computer science have played a facilitating role in this process. One promising approach that has emerged is sensor-based assessment using wireless accelerometers. In this study, a composite masonry bridge was assessed using a comparison of natural frequencies. The dynamic properties of the bridge's superstructure were extracted using two methods: Frequency Domain Decomposition (FDD) and Subspace Identification (SSI). The analysis revealed that most of the natural frequencies for both girder 1 and girder-2 were similar with a deviation of 6 - 8%. However, there were 2 frequencies (27 th and 33 th span) that deviated with 30% and 65% respectively. 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