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采用ANSYS建立有限元计算模型,对套箍法加固RC轴压柱的极限承载力影响参数进行了研究。先利用4根加固柱的试验资料对有限元模型进行了验证分析,结果表明:对于加固柱的极限承载力,有限元计算结果和试验结果吻合较好。然后结合工程实际选取其中一根试验柱为基本柱,通过变换参数取值,总共计算了43根柱的极限承载力,从而对核心柱初始应力水平、套箍层配筋率、套箍层纵筋强度、套箍层配箍率、套箍层厚度和套箍层混凝土强度这6种可控设计参数进行了研究,揭示了每种参数对加固柱极限承载力的影响规律,并对后5种参数的影响程度进行了分析。根据计算分析结果,给出了几点加固设计建议。
The finite element model was established by ANSYS to study the influence parameters of the ultimate bearing capacity of RC axial columns strengthened by the hoop method. The experimental data of four reinforced columns are used to verify the finite element model. The results show that the calculated results agree well with the experimental results for the ultimate bearing capacity of reinforced columns. Then, based on the engineering practice, one of the test columns is selected as the basic column, and the ultimate bearing capacity of 43 columns is calculated by changing the parameters. The initial stress level of the core column, the reinforcement ratio of the hoop layer, Six kinds of controllable design parameters such as stirrup strength, stirrup ratio of hoop layer, hoop layer thickness and concrete strength of hoop layer were studied. The influence law of each parameter on the ultimate bearing capacity of reinforced column was revealed. The influence of species parameters was analyzed. According to the results of calculation and analysis, some suggestions for reinforcement design are given.