Mechanical Properties Analysis of Semi Parallel Wire Cables for Bridges with Symmetric Wires Break

Abstract:

Strands model or parallel model based on the assumption of parallel wire is helpless to semi parallel wire cable for its helical characteristics and complex structure. Based on the theory of Love’s curved bar, considering effects of the Poisson’s ratio and contact deflection between wires, introducing inter-wire contact force and friction, the mechanical model for multilayered semi parallel wire cables with symmetric wire breaks were updated. With some emphasis, axial force distribution of wires, magnification factors of axial force and axial stiffness of cable are discussed by numerical calculation. Numerical examples show that contact deformations aggravate nonuniform distribution of wires’ axial force and that the axial stiffness of cable falls much after wires break.