Abstract
In general, the actual approach to achieve the dynamic parameters of bridge structures is supported to use standard FEM software. The final element model can be created by many different ways. The best way to obtain the objective results is to create at least two variants of FEM model. Currently, standard software of the FEM type is enabled to use variable types of elements. This paper shows the two basic models types of real slender road bridge. This bridge is named as: “The New Bridge over Danube”. This bridge is one of the Slovak capital dominants. For both models creation the historical documentation and the real dimension's measurements were applied. Both FEM models were created in the software of Scia Engineer v. 2013.Many existing slender long – span bridges are structurally adequate with respect to the maximum design axle loads, they may suffer from fatigue related to the cyclic application of modern freight equipment axle loads. Only the relevant FEM model can consider the real dynamic behaviour of the bridge. This is the idea for the best identification of dynamic parameters and FEM model tuning.
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