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Structural Engineering and Mechanics Volume 66, Number 5, June10 2018 , pages 595-608 DOI: https://doi.org/10.12989/sem.2018.66.5.595 |
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Dynamic behavior of footbridges strengthened by external cable systems |
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Ioannis G. Raftoyiannis and George T. Michaltsos
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| Abstract | ||
| This paper deals with the lateral - torsional motion of bridges provided with external cables acting as dampers under the action of horizontal dynamic loads or of walking human crowd loads. A three dimensional analysis is performed for the solution of the bridge models. The theoretical formulation is based on a continuum approach, which has been widely used in the literature to analyze bridges. The resulting equations of the uncoupled motion are solved using the Laplace Transformation, while the case of the coupled motion is solved through the use of the potential energy. Finally, characteristic examples are presented and useful results are obtained. | ||
| Key Words | ||
| bridges; stay cables; footbridges; dynamic behaviour; damping systems | ||
| Address | ||
| Ioannis G. Raftoyiannis and George T. Michaltsos: Department of Civil Engineering, National Technical University of Athens, 9 Iroon Polytechneiou Str., Athens 15780, Greece | ||