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由于对NMM动力作用下边坡的稳定分析研究较少,利用数值流形法(NMM)对这一问题进行了分析研究,引入黏性阻尼来耗散系统的能量,通过算例验证了NMM求解边坡永久位移的有效性;利用地震动力时程分析得到的边坡应力场计算出了边坡的动力安全系数时程曲线,并搜索得到地震时程下最小安全系数及其对应的边坡最危险滑裂面,将该最危险滑裂面模型作为NMM的计算模型进行永久位移的计算且与Newmark法得到的结果进行对比,两者结果相近。结果表明:NMM可有效进行边坡动力稳定分析、模拟计算边坡的永久位移。
Since there are few studies on the stability analysis of slopes under the action of NMM, the numerical manifold method (NMM) is used to analyze this problem. Viscous damping is introduced to dissipate the energy of the system. Slope permanent displacement. The time-history curve of dynamic safety coefficient of slope is calculated by using the slope stress field obtained from the time-history analysis of seismic power. The minimum safety factor and the corresponding most dangerous slope The results show that the most dangerous slip surface model is used as the calculation model of NMM for permanent displacement calculation and compared with the result obtained from Newmark method. The results show that NMM can effectively analyze slope stability and simulate the permanent displacement of slope.