Algorithm for Locating the Datum Strand of a Suspension Bridge Considering the Influence of Friction and the Change in Tangent Point of the Cable Saddle

In order to accurately simulate the position of saddle in analysis and calculation a suspension bridge, then obtain accurate shape datum strand construction site, this paper puts forward method on geometric basis considering friction between main cable saddle. Firstly, is proposed formula deviation coordinates initial that equilibrium derived. Then, through theoretical derivation, program change tangent point compiled. Combined with analytical algorithm, concept temperature telescopic bar introduced, simulation given, which suitable for combination finite element numerical algorithm. Finally, reliability algorithm verified by comparison example, changing value friction, influence analyzed.