Optimization of Rope Force in Single Tower Steel Box Girder Cable-stayed Bridge with Space Cable Face
Space cable-stayed bridge has complicated interaction of cable forces because of its struc-tural particularity.Reasonable cabling force of bridge and adjustment of construction tensile force are the key problems to be solved.In order to study the above problems,the cable-stayed bridge on Xuefu Road in Shijiazhuang is used as the engineering background.By controlling the deflection,bending moment and cable-stayed cable force of the main girder,the influence matrix method is used to solve the cable-stayed cable force.Combining with the construction characteristics of steel box girder cable-stayed bridge,the feasibility of different cable-stayed tensile schemes is studied.The results show that the optimal cable forces obtained by the solution have little error with the design cable forces and a reasona-ble distribution of the cable forces.The cable tension and cable-forming forces of different schemes are obtained by the method of formal iteration,and the optimal cable tension scheme is determined by the analysis,which provides reference for engineering practice.
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