Geometric Nonlinear Analysis of Low-pylon Cable-stayed Bridge Based on Finite Element Method

摘要

Low-pylon cable-stayed bridge is a new style, which has developed rapidly in the 1980s. Changshan Bridge is the first cross-sea cable-stayed bridge in the cold area of China and is establishing in Dalian city of Liaoning province now. This paper takes this bridge as the background, analyzing the influence on structure of geometric nonlinearity. Cable sag and large displacement effect are considered in the analysis. And then, applying large common software-ANSYS to create finite element model to carry on the static calculation which are under the dead weight and secondary dead load, especially emphasize structure large displacement effect. At last, the linear and nonlinear analysis is made. Conclusions are obtained according to the comparison between those results. Study the feasibility of using ANSYS to realize geometric nonlinear analysis on structure.