Abstract
Masonry bridges, being the oldest form of structural type in Indian railway bridge networks, the need to address its structural safety for modern loading conditions is of primary importance. The engineering community faces challenges in determining the stability and capacity of these structures subjected to increasing traffic demands and speeds. Although various methods have been developed over the years to assess the condition of masonry bridges but there isn't any established methodology in the literature that can determine the load-carrying capacity and remaining lifespan of these structures. This study presents an approach to evaluate the structural integrity of a 93-year-old railway bridge in India. The bridge consists of 44 steel spans 24.4m long each and 13m tall stone masonry piers supported by well foundations. The bridge spans are being evaluated through the use of wireless accelerometer sensors where their dynamic characteristics are analyzed by capturing vibrations caused by ambient sources such as hammer strikes and human jumps. Further, a numerical model has been modeled and used to compare its modal frequency from the experimental testing across different spans. At the footnote, conclusions were drawn in identifying the weaker or deteriorating piers.
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