【摘要】 该文给出了基于有限元法的岩土边坡动力稳定分析的主要方法,对这些分析方法进行了较为详细的表述和分析,在此基础上提出了平均地震系数计算的新方法,即对潜在滑动区域分块按有限元法计算地震系数,进而再按拟静力法计算安全系数。为了考虑滑动体变形对地震稳定系数和永久变形的影响,应建立地震响应与地震永久变形相耦合的计算方法。指出边坡在地震荷载作用下产生的永久位移或累积变形作为边坡稳定性评价指标是科学合理的。最后提出了基于性态的边坡抗震设计方法,包括边坡抗震性态水准的划分、性能指标的建立和抗震设计方法。更多还原

【Abstract】 The seismic stability analysis of rock-soil slopes based on finite element method (FEM) are given in this paper. A new average seismic coefficient method is proposed, where the seismic coefficient of the potential sliding block is determined using the FEM, and then the safety factor is calculated according to the pseudo-static method. In order to consider the influence of slip deformation on seismic stability and permanent deformation, the coupled computational method of seismic response and permanent deformation should be established. It is a scientific and rational method where permanent displacement or accumulated deformation is used as slope stability evaluation index. Finally, the performance-based seismic design method is proposed, including the classification of performance level of slopes, the definition of performance index and the seismic design method.更多还原