通过预设裂缝单元对受损钢筋混凝土受弯构件的力学行为进行有限元仿真分析。研究中考虑了初始裂缝的数量、高度及间距等参数对混凝土受弯构件破坏模式和剩余承载力的影响。研究结果表明,初始裂缝参数对混凝土受弯构件的最终破坏模式有明显影响,初始裂缝高度对剩余承载力降低的影响最显著。 The finite element simulation analysis of the mechanical behavior of flexural members with damaged RC members is performed by using the pre-set crack element. In the study, the influence of initial crack number, height and spacing on the failure mode and residual capacity of concrete flexural members was considered. The results show that the initial crack parameters have a significant effect on the ultimate failure mode of concrete flexural members, and the initial crack height has the most significant impact on the decrease of residual capacity.