The paper presents the results of numerical simulation of moving load effect on the two-span highway bridge with various bridge spans ratio. The multi-body plane computing model of vehicle is adopted. The bridge computing model represents the bridge as the lumped mass model with 2 degrees of freedom. The mid-span bridge dynamic deflections are calculated. Equations of motion are solved numerically in the environment of the program system MATLAB. The results are mutually compared and quantitatively evaluated.

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