Research On Cable-stayed Bridge With Curved Tower And Spatial Cable Plane

In this paper, a bridge across west Liao river in Inner Mongolia municipality isselected as the engineering background. As a landscape bridge, the cable-stayed bridgewith curved tower and spatial cable plane was chosen as the bridge type.The design points, basic theory and key technology of the cable-stayed bridge wasanalyzed in this paper. The design technical standard and the main material andperformance is determined by the natural conditions of the bridge, basic design earthquakeacceleration and its scale. At last, this paper deals with longitudinal and cross-sectionallayout of the general structure of the bridge.Finite element software MIDAS Civil was used to set up mechanic models and makea checking calculation of the bridge structure strength, stiffness and stability calculation.The structure meets the design requirements after calculating.According to reasonable state of the structure, the minimum energy method was usedto deduce the cable force calculation formula of the stay cables. Lanczos iteration methodis used to calculate the dynamic characteristics, resulting in getting the main structuralnatural vibration periods. Using the theory of aerodynamics, this paper analyses thegalloping critical wind speed, flutter, and vortex-induced resonance and the seismicperformance of the structure under E1and E2earthquake.The research content has higher reference value and theoretical significance to staticand dynamic analysis of the cable-stayed bridge.