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为研究钢骨-钢管高强混凝土新型组合柱的抗弯力学性能,采用ABAQUS软件对钢骨-圆钢管高强混凝土组合柱纯弯力学性能进行有限元分析,得到了典型组合柱纯弯试件的荷载-挠度关系曲线,不同受力阶段的应力分布规律以及破坏模态,同时考虑不同参数对组合柱抗弯力学性能的影响,探讨了钢骨-圆钢管高强混凝土组合柱抗弯承载力实用计算方法,提出简化计算式,并将简化式计算结果与有限元及试验结果进行对比。最后用MATLAB编写了组合柱纯弯纤维模型法计算源程序,并将程序计算的弯矩-跨中挠度曲线与试验结果及有限元结果进行比较。结果表明:简化式计算结果与试验及有限元计算结果吻合良好,数值模型能较好地反映组合柱纯弯受力的弯矩-挠度曲线。
In order to study the flexural mechanical properties of the new type composite column with steel-steel tube high-strength concrete, the ABAQUS software is used to analyze the pure-bending mechanical properties of the composite columns with high-strength concrete-filled circular steel tube, and the load - deflection curve, stress distribution law and failure mode in different stress stages, and considering the influence of different parameters on the bending mechanics performance of composite columns, the practical calculation method of flexural capacity of SRC columns , A simplified calculation formula is proposed, and the simplified calculation results are compared with the finite element and test results. Finally, the source program was compiled by MATLAB and the bending moment-span mid-span deflection curve was compared with the experimental results and finite element results. The results show that the simplified calculation results are in good agreement with the experimental results and the finite element analysis. The numerical model can well reflect the moment-deflection curve of the composite column under pure bending force.