Local Stability and Optimization Analysis of Steel Box Girder of Gaolangang Bridge during Hoisting Construction
To analyze the local stability ofthe steel box girder of Gaolangang Bridge during hoisting construction,the local model of the weakest steel box girder was established using finite element software,based on the deck derrick crane provided by the construction organization.The influence of different crane structures on the stability of steel box girder was analyzed.A method to improve the structural stability was proposed in view of the insufficient local stability of steel box girder during hoisting construction.The results show that,structural stability of the steel box girder was affected by different deck derrick crane structures,the local stability of steel box girder could be improved by scattering the crane fulcrum position.The structural stability could be effectively improved and the structural safety could be ensured by adding stiffeners at the local instability position of the steel box girder.
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