The Design Of Multiple Cable Planes And Structural Analysis

Along with the development of the highway undertaking, the traffic volume is increasing faster and faster. The cable stayed bridge is developing in the direction of long range and more wider.With the lane numbers increasing from four lanes to eight lanes, the landscape's span length is more wider and wider.And so, cable-stayed bridge with double cable planes will increase the size of the beam. Especially for concrete cable-stayed bridge, the landscape orientation will control design.If increasing a plane of stay cable, the internal force and influence of live load is smaller.taking a concrete cable-stayed bridge and a steel cable-stayed bridge for example in the text,and discussing more influence details because of increasing a plane of stay cable.Huangpu bridge is a steel cable-stayed bridge with double cable planes in Guangzhou(single tower 383+322m=705m).It's landscape span length of the beam reachs 35m, the resistance to bending of the closed-end steel box girder is large enough,so double cable planes can meet the challenge easily.When multiple cable planes are combined with composite beam,it will play respective action well. A proposal of four planes cable-stayed bridge of composite beam will be made on condition that same span,same width,same load condition with Huangpu bridge.Base on the program I have done the economic analysis and detailed structure analysis.The results show that the alternative is feasible.