Aplicação do guia sétra na verificação do estado limite de serviço referente a vibração excessiva em uma passarela de madeira

Abstract

In constructions that receive dynamic loading of walking human like footbridges it is essential that those provide comfort and security for his users, since frequencies of the pedestrians' step can be very near of the natural frequency of this type of structure. For footbridges in wood, steel or concrete, in Brazil, there are no standards ones that recommend the checking of acceleration in footbridges. In this scenery, the next study consists of the computational dynamic analysis, for the method of the finite elements, of a hypothetical wooden footbridge, simply supported, employing loads recommended by the guide of French project SÉTRA (2006), simulating the dynamic structural performance through the software SCIA Engineer student version. With the obtained results it was possible to verify that the footbridge has modes of vibration in the vertical and horizontal directions within the parameters recommended by the French guide and other international norms, besides providing comfort to the users because it does not present excessive vibrations if it were to be performed.