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结合已有的CFST(concrete-filled steel tuber)本构模型,基于ANSYS分析,对已做试验的两个CFST(单圆管)单肋拱空间极限承载力进行了双重非线性有限元分析探讨。对比研究了六种建模方法下模型拱的极限承载状态,较好地得出了模型拱的极限承载力和极限承载位移。评价了各种建模方法的适应性,提出了ANSYS分析下精确模拟CFST拱极限承载力的基本原理、基本方法和建模方法选取的建议。计算结果与试验结果符合较好,验证了计算模型的合理性。研究成果可供计算CFST拱时参考。
Combined with the existing CFST (constitutive model of concrete-filled steel tuber), based on the ANSYS analysis, the dual nonlinear finite element analysis of the ultimate bearing capacity of two CFST single-ribbed arch bridges has been carried out. The ultimate bearing capacity of the model arch under six modeling methods is comparatively studied, and the ultimate bearing capacity and ultimate bearing capacity of the model arch are obtained well. The adaptability of various modeling methods was evaluated. The basic principle, basic method and selection of modeling method for accurately simulating the ultimate bearing capacity of CFST arch were put forward by ANSYS. The calculated result is in good agreement with the experimental result, which verifies the rationality of the calculation model. The results of the study are available for reference when calculating CFST arch.