The Steel Box Girder Stiffeners Sanchaji Xiangjiang River Bridge Local Stability Analysis Of Research

Based on the self-anchored suspension bridge of SanChaJi Xiang River Bridge in ChangSha City as engineering background, the buckling of stiffened plates in steel box girder was studied. The main works are as follows:1. Through the linear-elastic analysis of long thin plate, the reasonable boundary condition of the finite element analysis for common webs are proposed, the K factors of six kinds of the elastic constrained long plates under different longitudinal pressure gradient are obtained for simplified calculation.2. The stabilities of every stiffened plate in steel box girder of SanChaJi Xiang River Bridge are calculated respectively according to The Code for Design of Steel Structures, British Standard 5400 and the code of Japan. A brief remark on the codes is developed in the end of this chapter.3. By buckling analysis of the stiffened webs with open section and closed section in steel box girder of SanChaJi Xiang River Bridge, the linear-elastic buckling loads under different longitudinal pressure gradients and compression-shear action of the stiffened webs mentioned above are obtained.4. Considering the material non-linear, geometrical non-linear and initial geometrical bugs, the utmost carrying capacities under different longitudinal pressure gradients and compression-shear action for the webs of SanChaJi Bridge are obtained and compared.5. The linear-elastic buckling loads and utmost carrying capacities under compression-bending action of the top plate are obtained by calculation. Moreover, the influence of different positions of the wheels of vehicles on the linear-elastic buckling loads and utmost carrying capacities of the top plates are analyzed.