METODOLOGIA PRÁTICA PARA DETERMINAÇÃO DE CABLAGEM EM VIGAS DE PONTES ISOSTÁTICAS

Resumo

This paper aims to develop a practical methodology for determining the tendons in
prestressed bridge beams. In general, in Brazil, the tendons are defined by methods based on iterative
processes, highly dependent on the experience of the designer. Basically, the process involves the
definition of tendons and section checking. If the expected results are not achieved, the process is
repeated. The proposed methodology will include the determination of the tendons using Magnel
diagrams and the definition of the feasible domain, as well the definition of the limit zone for the
prestressing steel, considering isostatic structures. This article refers only to a methodology for cases
of isostatic bridges. However the final research also aims at the cases of continuous beams an
indeterminate bridge structures (Tokunaga,H.[1]). The developed proposal can be applied in manual
calculations or inserted in automated routines, in the framework of an application for practical design
process as in theoretical studies.