Abstract
The bow-string arch bridge across the Vah River was designed on the main Slovak railway line. Total length of the bridge is almost 451 m, while the lengths of two main spans are 124.8 m. To analyse behaviour of the bridge, spatial transformation model was developed using FEM software. The Eurocodes were applied for all verification procedures. Bridge global analysis and verification of arches against buckling is discussed in more detail. The variation of upper bracing system and its influence on out-of-plane buckling of the arches is presented. Together with an architecture point of view, a minimum load amplifier to reach the elastic instability αcr is used to estimate the suitability of the bracings.
Highlights
The main traffic lines in Slovakia, which have been included into European railway corridors, are under reconstruction and modernization during last decade
The main attention is paid to global analysis and verification of the arches under buckling and the associated system of bracing arches
Upper bracing of bowstring arch bridges is placed on visible part of the bridge and usually plays a dominant role in look of the bridge
Summary
The main traffic lines in Slovakia, which have been included into European railway corridors, are under reconstruction and modernization during last decade. The speed 160 km/h is required, at least, [1] In this context, our department has participated on design and processing of project documentation of several railway bridges. Considering great number of relatively large bridges around Nosicka Dam, the concept of maximum utilisation of arched bridges in this area has been agreed during preliminary design work in order to achieve consistent bridge structures in this attractive location. One of such bridges, located in the line section between towns Puchov and Povazska Bystrica, will be bridging the Nosicky Canal at the Vah River. The main attention is paid to global analysis and verification of the arches under buckling and the associated system of bracing arches
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