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Evaluation of numerical modeling for the seismic response of an arch dam: the case of the Tichy-Haf Dam

Ziadi El Houcine, Meksaouine Mohamed, Mekki Feriel

Przegląd Naukowy Inżynieria i Kształtowanie Środowiska

2025

Vol. 34, No. 1

19--41

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.

Influence of an empirical Geological Strength Index method for determining linear and nonlinear failure criteria

Vivanco Angélica, Avendaño Eslainer

Mining Science

2024

Vol. 31

199--218

The construction of tunnels and underground galleries in mining has as fundamental input data the results of the failure criteria: traditionally Hoek–Brown and Mohr–Coulomb, to determine the failure envelopes that will allow the design of an economically exploitable mining system within viable safety frameworks that these criteria will guide. Therefore, the determination of rock mass resistance becomes fundamental and complex simultaneously due to the very nature of rock mass. Then, to identify a stressful state in which an excavation can be in conditions of stability it is necessary to have certain information both high in quality and economically valuable, which is not available in the early stages of the mining project. Thus, empirical methods and statistical relationships take notoriety, so this research evaluates the influence of an empirical method for the determination of the Geological Strength Index on the Mohr–Coulomb and Hoek–Brown failure criteria, with the benefit of estimating a stress field in which the excavation can self-sustain, evaluated in a first estimate in the pre-feasibility stage of the project, giving a guideline for design engineers. This research argues that the Geological Strength Index estimation method of Vivanco and Avendaño is recommended to estimate the Mohr–Coulomb failure criterion, but not the Hoek–Brown failure criterion.