Finite Element Analysis Of Mian Girder Of Cable-Stayed Bridge With Low Pylon

Main girder of cable-stayed bridge with low pylon outside force is particularly complex, not only subjected to axial force, tension and transverse parts bending moments and shear forces, so uneven stress is a serious and increasing as the width of the box girder, shear lag effects are more severe.With cellar in Luzhou Changjiang River Bridge as the background, using finite element analysis theory,establish linkage model and cross the bridge adjacent to inclined cable anchorage and the surrounding area in a four beam space finite element model, analysis of box girder structure internal spatial stress status and its distribution and factors influencing the mechanical properties of box beam of and reasons for the changes, to do a thorough study.After calculation, comparison of spatial three dimensional model and frame model, two models of the same beam stress in basically the same results, such an approach is feasible, it better reflects the distribution of box girder in the stress state, and actually works.