Mechanical performances analysis of tension-torsion coupling anchor cable

Abstract

To reveal the tension-torsion coupling effect of the anchor cable, the three-dimension computational model was built. The mechanical performances of the anchor cable under tension-torsion coupling were studied by the analytical analysis and simulation verification on the model, and the coupling coefficient of the tension-torsion was proposed to define the percentage of the tensile force used for untwisting. The axial stress, shear stress and plastic development of the cross-section of the anchor cable were analysed also. Results show that the influence of the torsion of the anchor cable on the tensile force cannot be ignored. The tension-torsion coupling coefficient and the torque both increase with the increase of the diameter and the lay angle of the anchor cable. The maximum equivalent stress of the cross-section of the pulling anchor cable appears in the contact area of the inner and outer wires, and is larger under the free rotation than that under the restricted rotation condition. With the increase of the lay angle, the elastic modulus and the bearing capacity of the anchor cable decrease. The obtained conclusions can provide a reference for the similar practice of the anchor cable.