摘要
侧翼锁固平面旋转式滑坡变形模式可以概化为横向均布荷载与轴向受压组合变形的悬臂梁模型。基于Rayleigh- Ritz能量法 ,建立了含裂缝悬臂梁的弹性挠度 -荷载曲线方程 ,利用断裂力学中的应力强度因子破坏准则确定悬臂梁极限承载力 ,导出滑坡稳定系数的解析公式 。
The landslide with locked flank in plane rotation is progressively formed while the slope rock mass shows an asymmetrical rotation revolving round on the axis perpendicular to the latent sliding plane. Its displacement mode may be generalized as a cantilever under both the well distributed horizon load and the vertical compression. For the cantilever with a fracture situated on the locked later section where the maximum tensile stress appears, the elastic deflection load equation is established by using Rayleigh Ritz energy method. Then, the fracture criterion of the stress intensity factor is used to determine the critical load, and consequently the analytical formula of stability factor for the landslide is derived. In addition, a typical landslide is illustrated as an example of the use of above formula. Thus, the dynamics mechanism for the landslide is demonstrated theoretically.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2000年第5期634-639,共6页
Chinese Journal of Rock Mechanics and Engineering
基金
国家自然科学基金! ( 4 9872 0 87)
中国博士后科学基金
国土资源部岩土工程开放实验室基金
西南交通大学科学研究基金! ( 1999XM
关键词
滑坡
平面旋转
动力学
稳定性
landslide, plane rotation, dynamics, stability
