| Based on preliminary design, this thesis focuses on the problems of proper parameters determination of hanger installation, structural static behavior, dynamic behavior and stability of a steel truss tower self-anchored suspension bridge. The span arrangement of this bridge is 219+167 meters.At the beginning of this thesis, the author presents detailed process of building up the integrated finite element models of bridge by MIDAS/CIVIL and ANSYS, large-scale FEM software. In hanger tensioning analysis part, the author firstly summarizes physical behaviors of cable and methods for hanger installation in the self-anchored suspension bridge construction management. Then reasonable installation parameters for hangers are gained in the construction analysis process. A force-determination method is employed to calculate three ideal states with targets of displacement at the tower top and moment as well as stress at the tower bottom.The structural behaviors under loads of completed bridge stage are analysed, especially the structural behaviors are compared for the calculation models with or without pile-soil interaction. The loads include dead loads, moving loads, other variable loads and the combined effect of them.Dynamic analysis is composed of structural vibration analysis and seismic response analysis with nonlinear time history method. The influence of variable coefficient of added damp on seismic displacement response is also discussed. Besides, the main factors which influence the stability are involved in this thesis. Therefore, the static behaviors, dynamic behaviors, stable behaviors and analysis method for self-anchored suspension bridge are comprehensively understood. |
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