针对钢筋混凝土梁的受弯性能,建立了三维有限元数值分析模型,对试验全过程进行了非线性数值模拟,计算结果与试验数据吻合较好。利用该模型,分析了钢筋混凝土梁的受力变形机理,探讨了混凝土强度等级对梁受弯性能的影响。 According to the bending performance of RC beams, a three-dimensional finite element numerical analysis model is established, and the whole process of the experiment is simulated by nonlinear method. The calculation results are in good agreement with the experimental data. By using this model, the mechanical deformation mechanism of reinforced concrete beam is analyzed, and the effect of concrete strength grade on the flexural behavior of the beam is discussed.