摘要
提出用厚度较小的常规矩形(平面)或立方体(空间)单元来描述滑坡体与岩基之间的接触面,并给出了使滑动面上应力满足摩尔库仑极限条件的非线性迭代算法。在此基础上提出了保留滑动面上最下端单元处于弹性状态的滑坡体抗滑稳定安全系数的有限元迭代解法。这种方法可用于求解2维或3维问题,且能同时给出边坡临界失稳时的位移场和应力场。给出了具有折线滑动面的滑坡体抗滑稳定安全系数计算实例,结果表明该方法有效、合理和可靠。
The contact surface between landslide body and rock foundation is simulated by rectangle element for plane problems or cubic element for three dimensional problems with small thickness. A nonlinear iterative computation method is suggested to meet Mohr-Coulomb criterion for the stresses on the surface of sliding. On the basis of the nonlinear iterative method, a finite element iteration method of safety factor against sliding of the landslide body is presented to meet the limit equlibrium condition. This method can be used for 2D and 3D problems and the results include displacement field and the stress field. An example of the safety factor against a broken-line slide plane is analyzed. It demonstrates that the method suggested in this paper is effective,rational and reliable.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2003年第3期446-450,共5页
Chinese Journal of Rock Mechanics and Engineering
关键词
岩石力学
滑坡体
边坡稳定
安全系数
有限元
接触面
rock mechanics,landslide body,slope stability,factor of safety,finite element,contact surface
