The nonlinearity of bending stiffness caused by inter-wire slippage has become the major challenge in the prediction of strand bending behavior. This paper proposed an analytical approach to predict the hysteretic bending behavior of helical strands. As an extension of classical models, this paper additionally considered the wire slippage delayed by bending load. Moreover, the method of integral for discrete contact regions extended the always assumed continuous contact region into the discontinuous, which enables this model to analyze the realistic conditions of multi-layered strands having alternating algebraic signs of lay angles, such as ACSR conductors and S32 cable. The present model is compared with FEM and experimental data, and results demonstrated the effectiveness of this model in strand bending prediction.

线间打滑引起的弯曲刚度的非线性已经成为预测钢绞线弯曲行为的主要挑战。本文提出了一种分析方法来预测螺旋线的滞后弯曲行为。作为经典模型的扩展，本文还考虑了因弯曲载荷而延迟的钢丝滑移。此外，对离散接触区域进行积分的方法将始终假定的连续接触区域扩展为不连续区域，这使该模型能够分析具有交角交替代数符号的多层绞合线的实际条件，例如ACSR导体和S32电缆。将该模型与有限元和实验数据进行了比较，结果证明了该模型在钢绞线弯曲预测中的有效性。