The calculation formula of torsion moment of multi-strands wire rope as loaded are deducted by internal force analysis of single-strand wire rope and multi-strands wire rope while working.

• 对普通单层股钢丝绳和多股钢丝绳工作时内部受力进行分析,推导出多股钢丝绳加载时扭转力矩的计算公式。