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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.
The purpose of this paper is to combine the finite element method of slope stability analysis with the limit equilibrium method to study the stability of the slope under earthquake action and provide the basis for the protection of the slope under the earthquake.Methods The stability analysis of the slope under the earthquake loading Element software to establish a two-dimensional finite element model of slope structure calculation. Input the EL-Centro wave after adjusting the peak acceleration at the bottom of the bedrock to obtain the overall stress field of the slope, and obtain the assumption of no assumption Then apply the limit equilibrium theory to solve and compare with the traditional quasi-static method.Results Using the finite element method and the limit equilibrium method to calculate the slope stability coefficient and the quasi-static method, The former is 0.057 larger than the latter.Conclusion It is feasible to combine the finite element method with the limit equilibrium method to analyze the stability of the slope under the action of earthquake.The method does not make any assumptions about the force between bars and maintains the rigor of the theory, Calculation results more realistic.