考虑空间效应的桩基础水平承载力特性分析

桩基础在水平力作用下的力学特性,是结构-桩-土相互作用分析中需要考虑的重要问题。以桩-土的相互作用为出发点,结合实际工程——文昌13-1/13-2平台的钢管桩,采用P-Y曲线法对桩的水平承载能力进行非线性分析。实例计算比较表明,在三维受力状态下,由于桩基础的非线性效应,简单地把单桩计算得到桩头等效非线性弹簧刚度作为结构边界条件可能导致比较大的偏差。对这一问题进行了分析,并给出了修正方法。

Analysis of Pile Bearing Capacity Under Lateral Loads Considering Space Effects

The mechanical characteristic of piles under lateral loads is an important problem in PSI (pile-structure-interaction) analysis. Interaction between pile and soil under lateral loads is analyzed in detail by P - Y curve method in this paper. As an example, the mechanical behavior of a pile in a practical engineering WC 13-1/3-2 oil platform is presented. The results show that under some 3-D loading conditions, significant error can be induced due to the nonlinear characteristic of pile, simply using a nonlinear spring from single pile calculation as the structure boundaries. This problem is studied and amendment method is presented.