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以某黄河公路特大桥上部连续箱梁C55混凝土结构为工程背景,在大量系统的回弹检测抗压强度试验的基础上,揭示回弹法的基本原理,比较了传统方法与人工神经网络方法的计算结果,较为深入地研究了混凝土抗压强度和回弹值两者之间的内在关系,参照国家规范提供的回归公式并考虑两个变量的函数变化关系,对C55混凝土专用测强曲线进行了研究。对比分析结果表明:文中所得到的专用测强曲线线性相关性较好,且利用回归方程求得的强度平均相对误差和强度相对标准差较低,符合国家相关规范规定;与特大桥上部结构抽样混凝土回弹检测数据对比,混凝土的抗压强度的实测值与推定值吻合良好。
Based on the C55 concrete structure of the continuous box girder at the upper part of Huanghe River Highway Bridge, based on the test of compressive strength of a large number of systems by rebound test, the basic principle of rebound method is revealed, and the comparison between the traditional method and artificial neural network Comparing the compressive strength and the rebound value of concrete, the relationship between the two is deeply studied. With reference to the regression formula provided by national norms and taking into account the relationship between the function of the two variables, the concrete strength curve of C55 concrete the study. The results of comparative analysis show that the linear correlation of the special strength measurement curve obtained in this paper is good, and the average relative error and the relative standard deviation of the strength obtained by the regression equation are lower, which are consistent with the relevant national norms. Concrete rebound test data comparison, the measured value of concrete compressive strength is in good agreement with the estimated value.