Damage Model of Multilayered Semi parallel Wire Cables with Non symmetric Wire Breaks

Abstract:

Strands model or parallel model based on the assumption of parallel wires is helpless to a mechanical analysis of semi parallel wire cable for its helical characteristics and complex structure. Based on the theory of Love’s curved bar, the mechanical model for multilayered semi parallel wire cables under static tensile loads with non symmetric wire breaks were derived with a consideration of the deflections perpendicular to the tendon axis in the direction of the break wire, and the inter wire contact and friction. Distributions of wires’ axial force and related influence parameters are discussed by numerical calculation and parameter analysis. A comparison with the parallel model shows that non symmetric wire break leads to the marked non uniform distribution of wire axial force, and the parameters that affect the most the distribution of wire axial force are the inter wire friction coefficient and radial position of the break wire.

Key words:wire cables; non symmetric wire breaks; tensile loads; contact deflection