The Research Of Long-Span Cable-Stayed Bridges Under Construction

This thesis discusses the geometric nonlinear theory of the bars,plates and shells system and applies the technique of "birth and death element" to the simulation analysis for the long-span composite beam cable-stayed bridge under construction, which makes modeling job verysimple, and date transferring very easy. What' s more, the order flows are programmed based on ANSYS software, which makes simulation analysis rule and simple. Thisthesis puts forward virtual temperature load method combined with the restart technology, which guarantees the continuity under construction in onehand, in the other hand can keep and output the result of each stage.Taking the Jiangjin Guanyinyan Yangtze River Highway Bridge, the spacial force bearing properties of Large-span composite girder cable-stayed bridge areanalyzed through the whole construction process. To throughout the construction process based on, then several typical constructionstages are selected to analyze the influence of nonlinear factors, get the same conclusion for a particular stage of a separate non-linear analysis of factors affecting.This thesis illustrates systematically the stability theory of the Large-span composite girder cable-stayed bridge, introduces the way to analyze linear and geometrical nonlinearstability of cable-stayed bridges by ANSYS and contrasts stability coefficients in twotypical construction stages.