Frequency Veering Analysis of Cable-Girder System for Cable-Stayed Bridges

Analytic characteristic values of the simplified model were solved for cable-girder system. The characteristic vectors were derived. The system frequencies and modes were obtained which were simplified with non-dimensional method. The frequency veering of cable-girder system was analyzed with Maple numerical analysis software. The results show that there exist frequency veering and mode conversion among cable-girder modes under special parameter combination. Some slight changes of mechanical parameters cause fast conversion among cable-girder modes. Hybrid modes appear in the center of frequency veering area. Mode localization factor can be used to predict whether hybrid modes occur in cable-girder system effectively.