Research On The Stability Of Single-Tower Concrete Cable-Stayed Bridge

The methods of calculating the second kind of stability problems are expatiated using the nonlinear finite element method. The computational principle, judgement criterion and method of stability and the simplification of constitutive relation are illustrated. The model of the stability computation and the computational process of the stability case of the single-tower concrete cable-stayed bridge are proposed.Based on the Luzhou Taian Yangtze River Bridge, which is on construction, The stability of the construction in which considered the geometric nonlinearity only and considered both geometric nonlinearity and material nonlinearity is analyzed. The buckling configuration of the longest double cantilever stage, longest single cantilever stage and second term dead load stage are paid great attention to.considering the stability of the cable-stayed bridge other factors, The buckling configuration the entire construction process of the longest double cantilever stage, longest single cantilever stage are analyzed.The result of the modal generated by designed coordinates and the modal considering construction process are compared. The buckling configuration of the longest single cantilever stage in which considered the entire geometric nonlinearity is analyzed.Consider boundary conditions, asymmetric double-cantilever construction, and at the inter-structure, the elastic modulus of concrete impact analysis, the corresponding conclusions.