钢纤维混凝土劈裂强度与弯拉强度之间的回归分析

Regression Analysis of Steel Fiber Reinforced Concrete between the Splitting Strength and the Flexural Strength

为了获得水泥混凝土路面施工验收时以现场取芯芯样劈裂强度推算评定弯拉强度依据,通过对隧道路面及高速公路收费站、服务区路面钢纤维混凝土进行弯拉强度与劈裂强度试验,利用数理统计方法建立了钢纤维混凝土劈裂强度与抗弯拉强度之间的回归式,在显著性水平α=0.05时,利用F检验法对线性回归方程进行检验表明实测标准小梁弯拉强度与对应芯样劈裂强度的回归公式是显著的,故所求的线性回归方程具有使用价值,获得的回归公式可以用于施工验收。

In order to obtain the basis of calculating and evaluating the flexural tensile strength by splitting strength which tested on the spot during the acceptance work,in this paper,the experiment of bending tensile strength and splitting strength were conducted on steel fiber reinforced concrete pavement of Hunan highway,and the method of mathematical statistics was used to establish the conversion relationship between the splitting tensile strength and the tensile strength of steel fiber reinforced concrete,the F-test method was used to test the linear regression equation when significance level was 0.05,and test result showed that the regression formula,built on the measured standard orbicular bending strength and the corresponding splitting strength of the core samples regression,was distinct,so the regression formula possessed good practical value,and it could be applied to this project＇s checking and acceptance.