The evaluation of dynamic of designed truss railway bridge in the light of Eurocodes standards
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Issue Vol. 16 No. 3 (2017)
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Experimental modal analysis in research
005-012
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The evaluation of dynamic of designed truss railway bridge in the light of Eurocodes standards
013-024
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Evaluation of degradation of bricks using FRF
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Comparison of different strength characteristics of gravel concrete with variable index w/c
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Abstract
According to the amendment of the "railway" Regulation of June 2014, railway bridges should be designed on the basis of PN-EN (Eurocode) standards, which extended the scope of computational analysis at the stage of structural design with dynamic issues. It includes theoretical modal analysis (eigenvalue problem) along with assessment of structural sensitivity to selected forms of vibration, traveler comfort and time-step analysis (integration of traffic equations under standard HSLM trains). In some cases, at planned train speeds v≤200 km/h, the dynamic calculations of the system can be reduced to modal analysis. The study presents the evaluation of the design of the truss railway bridge with a span of Lt=75.0 m in dynamic terms as required by Eurocodes. Moreover, the impact of applied construction solutions on the modal characteristics of the bridge is commented.
