LOAD TEST OF THE TRUSSED RIVER STRUCTURE OF THE RAILWAY BRIDGE OVER THE TISZA BETWEEN CSONGRÁD AND SZENTES

Abstract

In this paper, the railway bridge of the longest span ever built in Hungary is dealt with. It contains also information on the structures constructed prior to this recent one. The behaviour of the new trussed structure is discussed in detail. The phenomena not traceable by traditional calculation were revealed by measurements destined and performed to clear up the numerous problems of the detail. In the paper, the secondary stresses of joints playing an especially active role with respect to fatigue-life as well as the complex holding character of the individual structural elements, the defliections of basic importance for the classification of bridges, the possible consequences of the applied layout of the upper sway-bracing and the effect of dynamic load are dealt with in detail. In the course of evaluation, simply treatable computational models are also described the results of which are compared with the concrete, measured values.