| In this thesis, firstly, the development and application of the cable-stayed bridge is reviewed respectively. Several typical models of leaning tower cable-stayed bridges in China and abroad are emphatically introduced. An overview of typical cable-girder anchorage is also listed in the thesis. And the stability of the steel tower of cable-stayed bridge is narrated too. Besides, based on a scheme design of a (70+80+200+80+70)m five-span continuous cable-stayed bridge with steel box girder, the finite element model of entire bridge based on beam elements is established by using MIDAS/CIVIL a professional bridge analysis software. The bridge structure’s deformation and stress under the combined actions of dead load, live load, lateral wind load and temperature action are calculated and analyzed. Furthermore, an integrated finite element model of the entire bridge based on solid and plate elements is established by a finite element software ALGOR. To simulate the anchorage structure of cable-girder in detail, the mesh of the cable-girder anchorage segment is refined in the entire bridge model. Using this refined finite element model, detailed stress distribution of the cable-girder anchorage under the largest cable force is calculated and analyzed. According to the calculation results three trail schemes and some suggestions of optimization of the cable-girder anchorage are given. Finally, after the mesh of the tower segment is refined in the entire bridge model, the elastic stability of the steel tower is calculated and analyzed. According to the calculation results five trail schemes and some suggestions of optimization of the steel pylon design are given. |
PDF Full Text Request