双排抗滑桩有限杆单元计算方法研究

Study on Finite Beam Element Method for Double-row Anti-slide Pile

采用相关公式推导了考虑桩土相互作用与两者协调变形的刚度矩阵,该矩阵由桩身单元的刚度矩阵与考虑桩土相互作用的单元刚度矩阵两者叠加而成。利用有限杆单元法求解桩身每个单元节点的位移和转角,最终求解出桩身各单元的剪力和弯矩。同时,建立了双排抗滑桩的受力模型,也利用有限杆单元法对建立的双排抗滑桩模型进行求解。

The stiffness matrix which considered pile-soil interaction and the compatible deformation was derived with related formula. This matrix was resulted from superimposition of the pile element stiffness matrix and the element stiffness matrix taking pile-soil interaction into consideration;then the displacement and intersection angle of each node of pile element may be solved by finite beam element method, finally the shear force and bending moment of each pile element solved. At the same time, the mechanical model of double-row anti-slide pile was established, whose solution was obtained by finite beam element method.