块体单元法及其在岩体稳定分析中的应用

所提出的块体单元法，是以块体单元的刚体位移为基本未知量，并根据它们在外力作用下的平衡条件、变形协调条件及块体之间夹层材料的本构关系，建立起块体单元法的支配方程，用于确定块体位移及夹层材料的应力状态。该法特点适用于具有地质结构面岩体的稳定分析，也可以对一般结构进行变形和应力分析。与有限单元法相比，可减少未知量个数，提高计算精度和速度。

Rigid Body Element Method and Its Application in Stability Analysis of Rock Mass

he Rigid Body Element Method is presented.The basic unknown quantities in this method are the rigid displacements of the elements.According to their equilibrium condition under loads,deformation condition and constitutive law of the joint material between the bodies,the governing equations are derived. By solving them,the displacements of the bodies and the stresses in the joint materials are obtained. The method can be applied to deformation and stress analysis for structures,especially to stability analysis for jointed rock mass. In comparison with FEM,the number of unknown quantities is reduced and the calculution speed is raised.