侧翼锁固平面旋转式滑坡动力学机理分析

 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Rayleigh2R itz 能量法, 建立了含裂缝悬臂梁的弹性挠度2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, 从而在理论上定量地论证了这类滑坡的动力学机理及稳定性判据。

STUDY ON DYNAMICS MECHANISM OF LANDSLIDE WITH LOCKED FLANK IN PLANE ROTATION

The landslide with locked flank in plane rotationis progressively formed while the slope rock mass shows an asymmetrical rotation revolvinground on the axis perpendicular to the latent sliding plane. Its displacement mode may begeneralized as a cantilever under both the well-distributed horizon load and the verticalcompression. For the cantilever with a fracture situated on the locked later section wherethe maximum tensile stress appears, the elastic deflection-load equation is established byusing Rayleigh-Ritz energy method. Then, the fracture criterion of the stress intensityfactor is used to determine the critical load, and consequently the analytical formula ofstability factor for the landslide is derived. In addition, a typical landslide isillustrated as an example of the use of above formula. Thus, the dynamics mechanism forthe landslide is demonstrated theoretically.