Realistic constitutive ground models are critical in the evaluation of soil-structure interaction problems and the assessment of key design parameters in the seismic analysis of infrastructure systems. In the present study, the modified pseudo-dynamic lateral earth pressures acting on retaining structure with granular backfill of depth-varying damping ratio are evaluated adopting the lower bound limit analysis in conjunction with the finite element (FE) discretization method using second-order cone programming (SOCP). The earthquake loading is simulated by the propagation of shear and primary waves through non-constant inertia forces in the horizontal and vertical directions, respectively. The influence of varying damping ratio alongside the retaining wall height on the seismic active and passive lateral earth pressures is effectively taken into account by adopting well-established formulas published in the literature. It is shown that failing to consider the damping variation with depth while performing the modified pseudo-dynamic analysis could lead to precarious, unrealistic estimates of design parameters.

中文翻译：

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变深阻尼挡土墙回填系统修正拟动力侧向土压力下界分析 FEM-二阶锥规划

真实的本构地面模型对于评估土壤-结构相互作用问题和评估基础设施系统抗震分析中的关键设计参数至关重要。在本研究中，采用下限分析结合有限元（FE）离散化方法使用二阶锥体，评估了修正的拟动力侧向土压力对具有变深阻尼比的粒状回填土的挡土结构的影响。编程（SOCP）。地震荷载是通过横波和主波分别通过水平和垂直方向的非恒定惯性力传播来模拟的。沿挡土墙高度变化的阻尼比对地震主动和被动侧向土压力的影响通过采用文献中公布的行之有效的公式得到有效考虑。结果表明，在执行修正的伪动力分析时未能考虑阻尼随深度的变化可能会导致对设计参数的不稳定、不切实际的估计。