基于岭估计的硅酸盐混凝土抗压试验分析  

Analysis of Compressive Test of Silicate Concrete Based on Ridge Estimation

作　　者：贾敏 韩子斌 JIA Min;HAN Zi-bin(College of Mining Engineering, North China University of Science and Technology, Tangshan Hebei 063210, China)

机构地区：[1]华北理工大学矿业工程学院

出　　处：《华北理工大学学报（自然科学版）》2019年第3期84-89,共6页Journal of North China University of Science and Technology：Natural Science Edition

摘　　要：通过测试混凝土养护28 d期间的抗压实验数据,采用三次多项式曲线模型对影响混凝土抗压强度值的变化龄期进行拟合分析时,由于法方程系数矩阵可能存在严重病态,从而导致拟合结果不可信。针对这种现象,应用2种不同岭参数k(岭迹法和双h公式法)的岭估计拟合试验,相比于普通最小二乘法,基于双h公式法的岭估计能够更加减小数据误差对拟合结果的影响,从而达到与实际结果更吻合的效果,并能较准确地预测出不同时期混凝土的抗压强度值。Through the experimental data of the silicate concrete compressive test during the 28-day period, when cubic polynomial curve model was used to fit and analyze the changing day of concrete compressive strength, the fitting matrix of the normal equation might be seriously ill-coefficient, which leads to the issue that the fitting result cannot be trusted. In response to this phenomenon, the ridge estimation fitting experiment using two different ridge parameters k(ridge and double h formula) was applied. Compared with the ordinary least squares method, the influence of data error on the fitting result can be reduced by the ridge estimation based on the double h formula, so as to achieve amore consistent with the actual effect and a more accurate prediction on the compressive strength value of concrete in different periods.

关 键 词：混凝土 抗压强度 最小二乘 曲线拟合 岭估计 

分 类 号：TU528.44[建筑科学—建筑技术科学]