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Reliability based design optimization of gravity retaining walls

机译：重力挡土墙基于可靠性的设计优化

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In this paper the use of probability theory in reliability based optimum design of reinforced gravity retaining wall is described. The formulation for computing system reliability index is presented. A parametric study is conducted using advanced first order second moment method (AFOSM) developed by Hasofer-Lind and Rackwitz- Fiessler (HL-RF) to asses the effect of uncertainties in design parameters on the probability of failure of reinforced gravity retaining wall. Totally 8 modes of failure are considered, viz overturning, sliding, eccentricity, bearing capacity failure, shear and moment failure in the toe slab and heel slab. The analysis is performed by treating back fill soil properties, foundation soil properties, geometric properties of wall, reinforcement properties and concrete properties as random variables. These results are used to investigate optimum wall proportions for different coefficients of variation of Φ(5% and 10%) and targeting system reliability index (βτ) in the range of 3 - 3.2.
机译：本文介绍了概率论在基于可靠度的加筋重力挡土墙优化设计中的应用。给出了计算系统可靠性指标的公式。使用由Hasofer-Lind和Rackwitz-Fiessler（HL-RF）开发的高级一阶第二矩方法（AFOSM）进行参数研究，以评估设计参数不确定性对加筋重力挡土墙失效概率的影响。总共考虑了8种破坏模式，即脚趾板和脚跟板的倾覆，滑动，偏心，承载能力破坏，剪切和力矩破坏。通过将回填土的特性，地基土的特性，墙的几何特性，钢筋的特性和混凝土的特性视为随机变量来进行分析。这些结果用于研究不同的Φ（5％和10％）变异系数和目标系统可靠性指标（βτ）在3-3.2之间的最佳墙体比例。

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