## 5 Conclusions  
Overall, the results of this study underline the potential of simplified experimental dynamic characterizations as valuable tools for rapid structural assessments in scenarios where continuous monitoring is unfeasible.  
Despite minor discrepancies (Table 3), particularly in higher modes, the results confirm that an expedited experimental dynamic characterization can yield comparable fundamen  
\begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline  & \(\mathbf{f^{SSR}}\) & & & **[PERSON] et al. [25]** & & \multicolumn{2}{c}{**Af (\%)**} \\ \hline
**Mode** & \(\mathbf{f_{NS}}\) **(Hz)** & \(\mathbf{f_{EW}}\) **(Hz)** & **Mode** & \(\mathbf{f^{EXP}}\) **(Hz)** & \(\mathbf{f^{FEM}}\) **(Hz)** & **(\(\mathbf{f^{SSR}}-\mathbf{f^{EXP}}\))/\(\mathbf{f^{EXP}}\)** & **(\(\mathbf{f^{SSR}}-\mathbf{f^{FEM}}\))/\(\mathbf{f^{FEM}}\)** \\ \hline \multirow{2}{*}{1--rocking} & & 1.406 & 1-translational Y & 1.37 & 1.36 & 2.6\% & 3.4\% \\ \cline{2-7}  & 1.438 & & 2-translational X & 1.43 & 1.44 & 0.6\% & \(-\)0.1\% \\ \hline
2—torsion & 3.531 & 3.5 & 3-torsional & 3.35 & 2.90 & 4.5\% & 20.7\% \\ \hline \multirow{2}{*}{3—1 st flexural} & & 5.688 & & 4-translational X & n/a & 5.07 & n/a & 12.2\% \\ \cline{2-7}  & & 5.531 & 5-translational Y & n/a & 5.19 & n/a & 6.6\% \\ \hline \multirow{2}{*}{3—1 st flexural} & & & 6-vertical & n/a & 8.05 & n/a & n/a \\ \hline
4—2 nd flexural & 9.375 & 9.063 & & & n/a & n/a \\ \hline \hline \end{tabular}
\end{table}
Table 3: Comparison between experimental vibration frequencies obtained in this study with experimental and numerical natural frequencies reported by [PERSON] et al. [25].  
tal modal parameters to those obtained through long-term monitoring and numerical simulation. The slight variations observed can be attributed to differences in measurement conditions, data processing techniques, and the inherent limitations of a single measurement session compared to continuous monitoring.  
Furthermore, while [PERSON] et al. [25] validated their FE model using earthquake recordings, our study relies solely on ambient noise measurements. The absence of high-intensity dynamic excitations in our data collection means that the effects of nonlinear soil-structure interaction may be less pronounced. Nevertheless, the strong correlation between the identified vibration frequencies suggests that simplified measurement techniques can provide valuable structural insights, particularly for preliminary assessments or cases where long-term monitoring is not applicable.  
This comparison highlights the strengths and limitations of the different methodologies. While continuous monitoring provides more comprehensive data over time, simplified experimental dynamic characterizations can serve as effective tools for rapid assessments, particularly in cases where prompt structural assessments are required. Future research should integrate rapid experimental surveys with numerical modeling to enhance structural evaluation.  
Conceptualization, S.G. and S.I.; methodology, S.G. and G.M.; validation, S.G., S.I. and G.M.; formal analysis, S.G.; investigation, S.G., S.I. and G.M.; data curation, S.G.; writing--original draft preparation, S.G.; writing--review and editing, S.G., S.I. and G.M.; visualization, S.G. and G.M.; supervision, S.G. and S.I. All authors have read and agreed to the published version of the manuscript.  
This research received no external funding.  
Not applicable.  
The raw data supporting the conclusions of this article will be made available by the authors on request.  
The authors wish to thank Mons. La Speme for allowing the surveys to be carried out.  
The authors declare no conflicts of interest.  
The following abbreviations are used in this manuscript:  
\begin{tabular}{l l} HVSR & Horizontal-to-Vertical Spectral Ratio \\ MASW & Multichannel Analysis of Seismic Wave \\ RDM & Random Decrement Method \\ SSR & Standard Spectral Ratio \\ FFT & Fast Fourier Transform \\ \end{tabular}