【摘要】 目的将边坡稳定分析的有限元法与极限平衡法相结合,研究地震作用下边坡稳定性,为边坡在地震作用下的防护提供依据.方法应用专门针对地震荷载作用下边坡稳定性分析的有限元软件,建立边坡结构计算的二维有限元模型,在基岩底部输入调整峰值加速度后的EL-Centro波,获得边坡整体的应力场,得到各土条界面上的不做任何假设的条间力,然后运用极限平衡理论进行求解并与传统的拟静力法进行比较.结果利用有限元法与极限平衡法耦合计算所得边坡稳定性系数与拟静力法的结果相差不大,前者比后者大0.057.结论有限元法与极限平衡法相结合用来分析地震作用下的边坡稳定性是可行的.该方法不再做任何条间力的假设,保持了理论的严密性,计算结果更加符合实际.更多还原

【Abstract】 A method combining the elastoplastic finite element method(FEM)with the limit equilibrium method is proposed to analyze the slope stability problems on the earthquake action,provides theoretical bases for the design of the Slope Protection under earthquake.Professional software is used to analyze the slope stability problems under earthquake,and then it establishes a two-dimensional finite element model for the slop.By inputing the El-Centro earthquake wave to the bedrock,the paper can get the whole stress field of the slope to obtain all forces between the slices on the interface without doing any hypothesis,and then compare the limit equilibrium theory with the traditional pseudo-static method.The factor of safety can be achieved from using the elastoplastic finite element method,together with the limit equilibrium which is different from pseudo-static method,and the former is 0.057 bigger than the latter.It is practicable to combine the elastoplastic finite element method with the limit equilibrium method to analyze the slope stability problems under earthquake.This method can obtain the forces between the slices with no hypothesis to keep the theory more rigorous,and the calculation results are more practical.更多还原