Non-Linear Static and Modal Analysis of Three Types of Cable-Stayed Bridges

Abstract

This paper is concerned about the study of cable-stayed bridges having three spans with double plane of cables. Three common types of bridge arrangement are considered - harp, fan and radiating shapes. The influence of the arrangements of cables on the bridge deformation is examined. The relationship between the sag and the other parameters of cables for each type is presented. In the static analysis, the energy method, based on the minimization of the total potential energy of structural elements, via conjugate gradient technique is used. A computer program in FORTRAN language is used in the analysis of bridge model. Natural frequencies for the considered types of cable-stayed bridge are calculated, using the SAP2000 program.

Keywords: Non-linear static analysis, cable structures, cable stayed bridges, minimization of potential energy, conjugate gradient method.