A nonlinear finite element framework and Gaussian process-based prediction of stick/slip behaviour in semi-parallel wire cables.

This paper addresses the effect of wire slipping on the mechanical properties of structural cables. Based on parameter calibration with experimental data, the paper proposes a Finite Element modelling framework aimed at enhancing the prediction accuracy of the stick/slip behaviour of semi-parallel wire (SPW) cables. The model considers the specific arrangement of the SPW cable composition, interwire friction, and residual interlock between wires. Gaussian Process regression is employed as a surrogate model to reduce the model's computational cost, optimise parameters and quantify uncertainty. The results show high prediction accuracy when compared with experimental data for different pretension forces. The study finds that wire slip varies considerably between wire layers and is significantly influenced by residual interlock between wires. Additionally, cyclic loading under high bending curvatures reveals that the hysteresis behaviour is dependent on wire slip and loading history. The proposed model accurately predicts the stick/slip behaviour of SPW cables, emphasising the importance of accounting for wire slipping in cable analysis models for various applications. • A proposed FEM framework for accurate prediction of stick/slip behaviour of large diameter semi-parallel wire cables. • Gaussian Processes used to reduce computational cost and quantify uncertainty. • Significant influence of residual interlock between wires on stick/slip and hysteresis. • Residual cohesion interlock is significantly higher in the inner wire layers. • Wire slip is dependent on bending curvature and loading history. [ABSTRACT FROM AUTHOR]