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针对纤维复合材料加固的钢筋混凝土梁,阐述了国内外规范及学者采用截面刚度的计算方法,选取国内已有模型试验梁的试验结果,基于曲率法回归分析得到了试验梁的拟合刚度计算公式。通过与已有经验公式的综合对比分析,结果表明:曲率法回归分析得到的纤维复合材料加固后截面的刚度公式更符合实际,且公式计算挠度值与实测值偏差较小;与已有经验公式的挠度计算值进行对比分析,文中拟合公式的刚度计算值较小、挠度计算值相对较大,更接近试验实测值,相对经验公式的计算结果更能反映结构的实际状况。
Aiming at the reinforced concrete beams reinforced with fiber composites, the calculation methods of cross-section stiffness adopted by domestic and foreign norms and scholars are described. The test results of the existing model test beams in China are selected. The formula for calculating the fitting stiffness of the test beams is obtained based on the curvature regression analysis. . The results show that the stiffness formula of the cross-section of fiber reinforced composites obtained by the regression analysis of curvature method is more realistic, and the deviation between calculated and measured values is smaller. Compared with the existing empirical formula The calculated values of deflection are relatively small and the calculated values of deflection are relatively large, which are closer to the measured values of the test. The calculation results of the relative empirical formulas can better reflect the actual conditions of the structure.