Decision On Resionable Design State And Analysis Of Construction Stages Of Self-anchored Suspension Bridge

The steel box girder self-anchored suspension bridge is a self-balanced structuresystem with strong wind resistance, dynamic performance and excellent visual effects,which is the preferred bridge type for special section. The construction process isconducted through pushing the main beam on the bracket or temporary pier aftererection of the main cable, and then hang the sling tensioning bridge. This paperintends to explore the difficulties in accurate calculation of the main cable-shapedinternal force to determine the bridge state and proper construction sequence.This paper has explained the taohuayu steel box girder self-anchored suspensionbridge based on the theory of elasticity under the self-anchored suspension bridge inthe vertical loads, the deflection theory and the finite displacement theory, and madean in-depth study on three main cable shape of computing theory--the section linemethod, parabola method and piecewise catenary, using matlab software to write theprogram. Matlab software is used in segmental catenary theory and segmentalstraight-line theory.The parabola method is simpler using hand-calculation. Throughcomparison of the calculated results, the results of piecewise catenary method is moreaccurate to be the bridge data of design of segment catenary.Based on the suspension bridge geometric nonlinear theory, this paper hasestablished the self-anchored suspension ANSYS model to build the bridge finiteelement ANSYS model. All the data were analyzed after running through this model.It is reasonable to determine the bridge to bridge state which can serve as a bridgeforming data. The thesis proposed two construction programs using zero-stress stateand backword calculation, combined with exploration of the sling tensioning programsystem. Finally, the optimal solution to guide the construction was determinedaccording to the eight principles of the sling tension program.