Protensão em pontes celulares curvas. / Prestressing of curved box-girder bridges.
AUTOR(ES)
Lorenzo Augusto Ruschi e Luchi
DATA DE PUBLICAÇÃO
2001
RESUMO
This work compares the results from a practical and simplified method and the Finite Element Method to determinate section efforts in prestressed box-girder curved bridges. The first part, theoretical, introduces the basic principles of the cellular curved beams, showing the differences of its behavior comparing with straight beams. Next, prestressing of concrete members is discussed, emphasizing its effects in curved beams. Finally, calculation methods are presented, covering many loading situations, but always emphasizing the prestressing load. In the second part, practical, a comparative study is elaborated, taking two road unicellular bridges, one simply supported and another continuum, submitted to prestressing load. After models construction, such beams are calculated using a commercial software of Finite Element Method. Then, some results are compared with those calculated by simplified method, thus elaborating practical comments that can be used in the current designs of engineering.
ASSUNTO(S)
protensão curved bridges box-girder bridges pontes curvas pontes celulares prestressing
