Abstract

The paper presents investigation of the dynamic behavior of composite bridges with open web girders. The bridge span is made of reinforced concrete layers with a metal pan underneath. The dynamic tests of the bridge structure are carried out using the multichannel vibrodiagnostic test kit for measuring the eigenfrequency. The software application LIRA is used to develop the finite element model (FEM) of the bridge after its mathematical simulation. The FE model is subjected to loads identical to the experimental ones, and the dynamic behavior of the bridge is simulated to measure the multimode eigenfrequences. A careful comparison between the calculations and experimental results shows good agreement for the investigated parameters of the bridge structure.

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