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运用统一强度理论,采用薄壁圆筒的统一极限解,并考虑了CFRP圆管的材料特点,推得内置CFRP圆管的方钢管高强混凝土短柱的极限承载力计算公式。与有关文献试验数据进行比较,吻合良好,验证了公式的合理性。同时分析了拉压比α、材料强度参数b、含钢率n和相对配置率β对极限承载力的影响。该结果为内置CFRP圆管的方钢管高强混凝土柱的承载力分析计算提供了一定的理论依据。
By using the unified strength theory and the uniform limit solution of thin-walled cylinder, considering the material characteristics of the CFRP pipe, the formula for calculating the ultimate bearing capacity of CFST columns with CFRP circular pipe is derived. Compared with the experimental data of the relevant literature, the results are in good agreement with each other to verify the rationality of the formula. At the same time, the influence of tension-compression ratio α, material strength parameter b, steel content n and relative placement rate β on the ultimate bearing capacity was analyzed. The results provide a theoretical basis for the analysis of bearing capacity of CFST columns with CFRP circular tubes.