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PROCEEDINGS OF THE ELEVENTH INTERNATIONAL CONFERENCE ON CIVIL, STRUCTURAL AND ENVIRONMENTAL ENGINEERING COMPUTING
Edited by: B.H.V. Topping
Dynamic Modeling and Testing of a Cable-Stayed Pedestrian Bridge
J. Bencat and D. Papán
Department of Structural Mechanics, Faculty of Civil Engineering, University of Zilina, Slovakia
, "Dynamic Modeling and Testing of a Cable-Stayed Pedestrian Bridge", in B.H.V. Topping, (Editor), "Proceedings of the Eleventh International Conference on Civil, Structural and Environmental Engineering Computing", Civil-Comp Press, Stirlingshire, UK, Paper 3, 2007. doi:10.4203/ccp.86.3
Keywords: cable-stayed pedestrian bridge, bridge static and dynamic loading tests, structures diagnostics, spectral analysis of structures, natural frequencies and modes.
Modeling and testing of the structures is only way of assessing the reliability of assumptions made in the numerical modeling and it is the most satisfactory means of determining relevant parameters for evaluation of existing structures. A comparison of the values of certain quantities obtained by experiment and by theoretical analysis and computation is the necessary prerequisite for both static and dynamic loading tests, respectively (SLT and DLT).
Cable-stayed bridges, especially pedestrian slender structures exhibit complex behavior in which the lateral translation, torsion and vertical bending modes are often strongly coupled. The combined spatial dynamic behaviour increases the challenges involved in the modelling. This strongly combined vibration under the pedestrian load requires dynamic and static load testing. This paper discusses the experimental and analytical analysis of the cable-stayed pedestrian bridge over the Hron river near Zarnovica (SK). Static and dynamic responses were obtained using static and dynamic loading tests . Ambient vibration tests were also carried out to determine the service dynamic characteristics of the bridge and the basic modal parameters were identified in the frequency range 0.3 Hz to 10 Hz via spectral analysis . The experimental investigation was complemented by development of a simplified Finite Element Model (FEM), so that the main assumptions adopted in model were assessed through the comparison between measured and designed dynamic and modal parameters [2,3,4].
The conclusions of this paper are:
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