Received: 11.12.2025

Accepted: 22.01.2026

Published: 26.01.2026

In this paper a numerical analysis of a double-girder bridge crane was carried out in order to evaluate the seismic response of the main girder. The analysis includes static, modal and transient FEM analyses in Ansys, with the aim of obtaining a realistic picture of the structural behavior under earthquake excitation. Through the static analysis, the reference values for stresses and deformations under working conditions were obtained, while the modal analysis identified the natural frequencies and the dominant vibration modes. The transient analysis, performed with the real earthquake record El Centro, provides the time histories of displacements, accelerations and stresses at characteristic points along the span. The results showed that the seismic excitation causes increased and time-variable responses compared to the static values, but the structure remained in the elastic domain. The applied approach enables a more detailed representation of the dynamic effects on the girder and serves as a basis for more detailed inspection control of bridge cranes.

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