重力式挡土墙鲁棒性设计

Robust Geotechnical Design of Gravity Retaining Wall

摘要:

在现有结构可靠度设计理论的基础上提出了基于多目标优化方法和基于结构失效概率置信水平的2种岩土工程鲁棒性设计方法，考虑了岩土力学参数统计特征不确定性对结构失效概率的影响.结合某重力式挡土墙倾覆与滑移2种失效模式，分别运用可靠度设计方法与鲁棒性设计方法进行了挡土墙基本几何尺寸的设计.最后通过对2种设计方法的对比分析验证了岩土工程鲁棒性设计的合理性与重要性.

Abstract:

A new design methodology, robust geotechnical design, was proposed to improve the design of gravity retaining wall. In which, the effect of uncertainty in statistics of soil parameters on the failure probability was investigated. Furthermore, two different robust design approaches based respectively upon the multi objectives optimization and the confidence level of structural performance were introduced. To demonstrate the effectiveness and significance of the proposed robust design methodology, an illustrative example is followed. A comparative study was made of the design on the basis of the reliability based design methodology and the proposed robust design methodology, and the significance of the proposed robust design methodology is presented through this example.