Abstract:The natural vibration frequency of cable-stayed bridge is studied. The horizontal vibrational analysis model is established by using the double-particle method to deduce the calculation formula of longitudinal drift. The formula is simplified to obtain the practical estimation formula. The three-dimensional finite element models of Qihe Yellow River Bridge and etc. are established by the finite element method of Midas Civil software. Based on the modal test results of the finished bridge stage, the test results of finite element analysis, double-particle method, double-particle model estimating formula and field modal test are compared and analyzed. The results show that the finite element method can accurately simulate the actual stress state of the bridge, and the double-particle method and the estimation formula can provide the reference for the quick judge of anti-seismic and anti-wind performances of cable-stayed bridge in the scheme design stage.
