针对工字型钢-混凝土组合梁的受弯性能,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,分析了工字型钢-混凝土组合梁的受力变形机理,探讨了钢梁强度等级、混凝土强度等级、钢梁腹板厚度、混凝土板厚度及纵横向配筋率等对组合梁受弯性能的影响,为工程设计提供参考依据。 Aiming at the flexural behavior of I-shaped steel-concrete composite beams, a three-dimensional finite element numerical model was established, and the whole process of the experiment was simulated by nonlinear method. The calculated results are in good agreement with the experimental data. With this model, the mechanical and mechanical deformation of the I-shaped steel-concrete composite beam is analyzed. The effects of the strength of the steel beam, the concrete strength grade, the web thickness of the steel beam, the thickness of the concrete slab, Bending performance, provide a reference for engineering design.