Analysis of mechanical properties of partial cable-stayed bridges

partial cable-stayed bridges;  modeling;  Force;  Vibration characteristics

In order to analyze the mechanical properties of the bridge, the large finite element general software ANSYS is used for modeling, the main beam and tower are discretized by space beam unit (beam188), and the cable is simulated by the space rod unit (link10) that only bears the tensile force, and the finite element calculation model of the bridge is established, and the internal force, self-resonance frequency and mode shape of the bridge are calculated respectively. The calculation results show that for the cable-stayed bridge of the low tower part, the cable has a great influence on the axial force and bending moment of the main girder, and the stiffness of the main girder has a great influence on the self-resonance frequency of the whole bridge, and the low-order vibration of the bridge is mainly manifested as the overall vertical vibration and lateral vibration of the bridge. The calculation results can provide a reference for the health inspection and maintenance of the construction control and use phase of the bridge