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The seismic stability of concrete arch dams has always been a key parameter in seismic safety evaluation. For this purpose, this paper presents a numerical analysis of the seismic response of an arch of the Tichy-Haf Dam using the Midas GTS NX software. The study employs the finite element method and a nonlinear time history analysis to evaluate the stability of the structure. Several reference nodes on the dam body were selected to assess displacement, velocity, and acceleration during seismic events. To determine the values of these parameters, nonlinear time-history analyses were conducted using four accelerograms with amplitudes of 0.25 g, 0.32 g, 0.36 g, and 0.44 g, respectively. The dynamic numerical analysis revealed that the dam performed well during the seismic events, maintaining its structural integrity. The numerical model was validated by comparing the results from the static analysis with the actual monitoring data from the dam. This comparison demonstrated the effectiveness of the numerical simulation method in analyzing the stability of the arch dam.
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