抗震设计中,在非弹性范围内承受地震荷载时,需要考虑结构的延性。在本文的工作中分析了受弯构件实验结果和研究了计算钢筋混凝土受弯构件延性系数的计算机程序。在弯矩-曲率计算中采用了新的混凝土应力-应变表达式、在位移计算中考虑了塑性区实际长度和曲率分布。 In seismic design, the structural ductility needs to be considered when subjected to seismic loads in the inelastic range. In this work, the experimental results of bending members are analyzed and the computer program for calculating the ductility coefficient of reinforced concrete flexural members is studied. In the moment-curvature calculation, a new concrete stress-strain expression is used, and the actual length and curvature distribution of the plastic zone are considered in the displacement calculation.