土木工程与管理学报2011，Vol.28Issue(4)：30-33,57,5.
基于Boltzmann函数的桩基极限承载力预测
Prediction on Ultimate Bearing Capacity of Pile Based on Boltzmann Function
摘要
Abstract
To predict the ultimate bearing capacity by the curve fit of pile Q-S data, is usually used as an inference method, but the common curve fit accuracy is not good. Based on the least square theory and the Boltzmann function model, this paper adopts Levenberg-Marquardt algorithm to process the pile Q-S experimental data. The result shows that the fit effect and the prediction accuracy are satisfied. Thus, as a simple and effective method, Boltzmann function can be used to forecast the ultimate bearing capacity of piles. The hyperbolic, exponential curve and Boltzmann function are then used to forecast the later "destroyed" for slow-drop type curve of pile. The prediction result shows that a turning point can be seen on the slow-drop type curve in later stage, but the settlement development speed is different; the exponential curve drops too fast, hyperbola subsides too slowly, only Boltzmann function develops moderately, which indicates that the pile foundation plasticity is appropriately exerted and the phenomenon is close to reality. Therefore, Boltzmann function model is suitable to predict the later development for slow-drop type Q-S curves.关键词
波尔兹曼/荷载-沉降曲线/Levenberg-Marquardt算法/极限承载力/回归拟合Key words
Boltzmann/ Q-S curve/ Levenberg-Marquardt algorithm/ ultimate bearing capacity/ regression fitting分类
建筑与水利引用本文复制引用
刘胜利,赵文光,秦尚林,谌立军,张阳..基于Boltzmann函数的桩基极限承载力预测[J].土木工程与管理学报,2011,28(4):30-33,57,5.基金项目
国家自然科学基金(51079142) （51079142）
