Parametric Study on Ultimate Load Capacity of Long-span Cable-stayed Bridges

The elastic-plastic hinge method for analysis of physical nonlinearity of long-span cable-stayed bridges is utilized including geometrical nonlinearity effects in this paper,and ultimate load capacity is also studied when considering several parameters. The results show that the initially inner forces have greatly influence on the ultimate load capacity of cable-stayed bridges. The ultimate load of cable-stayed bridges is determined by the failure path of structure under the dead load. The geometrical nonlinearity effects can be neglected in calculating ultimate load. The ultimate load of long-span cable-stayed bridges is generated by physical nonlinearity.