修正灰色理论预测抗拔极限承载力

Forecast of Uplift Ultimate Bearing Capacity of Nanchang by Modified Gray Model

本文利用灰色模型中理想的新陈代谢模型,基于MATLAB灰色模型的实现,对三根桩的实验数据分析得出了不同组数的试验数据残差值,对几组残差值进行比较,确定用于预测抗拔桩承载力的最佳试验组数。同时提出了一种预测极限承载力的方法,即利用双曲线数学模型对各桩的最佳预测数据进行分段线性拟合,联系拟合直线与极限承载力的关系,研究得到抗拔极限承载力建议值。

Based on gray model in the realization of MATLAB,three piles of experimental data are investigated as object,the residual data from different number of experiment groups are analyzed by using the ideal model of metabolism which is one of the gray models.Compared the different groups of residual value,we can figure out the best experiment data to predict the uplift bearing capacity. At the same time,a method to predict the ultimate bearing capacity are proposed through the hyperbolic model to the optimal forecast data of each pile in piece-wise linear fitting,analysis the relationships? between linear fitting and ultimate capacity,we can finally get the recommended value of ultimate bearing capacity of each pile.