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针对外包钢-混凝土组合梁负弯矩区抗弯承载力性能,利用ABAQUS6.12有限元软件对组合梁进行非线性有限元数值模拟.有限元结果与试验值对比结果吻合较好.利用该模型,分析外包钢-混凝土组合梁负弯矩变形机理,探讨了混凝土强度等级、抗剪连接件间距、钢材屈服强度等因素对组合梁负弯矩区承载力的影响,为工程设计提供依据.
In order to study the flexural capacity of the composite steel-concrete composite beam (SRCB) under negative bending moment, the finite element method of ABAQUS6.12 is used to simulate the composite beam with finite element method. The results of the finite element analysis agree well with the experimental data. Model, the deformation mechanism of negative bending moment of the composite steel-encased concrete beam is analyzed. The influences of concrete strength grade, the distance between shear connectors and the yield strength of steel beam on the bearing capacity of the negative moment region of the composite beam are discussed, providing the basis for engineering design .