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The footbridge modeling, due to the necessity of its dynamic properties’ consideration, is not a trivial task, as mentioned in
many research papers. Each numerical model should describe the real behavior of the object, taking into account actual boundary
conditions, imperfections, or material properties. Simplifications adopted at the design stage of the facility should be validated
based on experimental data from static and dynamic tests (Lourens et al., 2012; Nunes et al., 2023; Nicolettiet al., 2023). This
process, called model updating (Yuen, 2012), can be made thanks to the implementation of various tools, e.g., Genetic Algorithms
(GA) like in Chisari et al. (2015), Bayesian inference like in Pepi et al. (2019).
The paper concerns the numerical modeling of cables of a cable-stayed footbridge (Fig. 1) over the Wisłok River in Rzeszów
(Poland) that has undergone significant degradation. An analyzed footbridge is a nearly 30-year-old structure, highly dynamically
susceptible to pedestrian traffic. Additionally, the footbridge design documentation has been lost, and consequently, the method
and order of assembly of individual components remain unknown. During its operation, the facility was subject to modifications
and renovations, but the last historical data on the structure's vibrations (Janas and Basiaga, 2010) come from before the footbridge
deck was replaced, and considered only the span's vibration, not cables. It increases the number of possible variable parameters of
the system
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