用幂函数最大曲率点估计抗拔桩承载力

Estimation on Bearing Capacity of Uplift Pile with Maximum Curvature Point of Power Function

作者在提出的抗拔桩荷载位移曲线幂函数模型的基础上,得出了用幂函数最大曲率点估算抗拔桩承载力的方法。先将该幂函数模型无量纲化,求得无量纲模型的曲率函数,再求导得到最大曲率点,用该点的荷载作为极限抗拔力。该方法与其它方法比较,具有人为干扰少,容易编程,精度高等特点。

On the basis of the power function model of load-displacement curve for uplift pile, this paper presents a new method of estimation the bearing capacity of uplift pile with maximum curvature point of power function. First, this power function model was made into non-dimensionization, and the curvature function of the dimensionless model was obtained. Then derivation to the curvature function, the maximum curvature point was obtained. This value of the point is used as ultimate capacity of uplift pile. Comparing with other methods, this method has these characteristics of less artificial interference, easy to program and higher precision.