Author(s)

J. Gyorgyi

Abstract

In tests of bridge behaviour under influence of moving load, a quasi-harmonic vibration task should be solved if we want to take into consideration also the mass of the moving body. Use of finite element method requires analysis of systems of several degrees of freedom and this calls for appropriate numerical techniques. Both the effect of the external damping proportional to the velocity should be computed and the procedure must be able to consider also the structural damping. During numerical tests, computations were carried out on a reality-like structure. The results underlines the importance of considering the internal friction of the structure. 1. Introduction Before the appearance of computers the test of bridges under the effect of a moving load could be analysed

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