Gradient-based design robustness measure for robust geotechnical design
Gradient-based design robustness measure for robust geotechnical design
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DOI：
10.1139/cgj-2013-0428
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发表时间：
2014-06
影响因子：
3.6
通讯作者：
W. Gong;S. Khoshnevisan;C. Juang
中科院分区：
文献类型：
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作者：
W. Gong;S. Khoshnevisan;C. Juang
本文提出了一种基于梯度的鲁棒性措施，同时考虑安全性，设计鲁棒性和成本效益的稳健岩土设计（RGD）。在稳健设计的背景下，如果所关注的系统响应在一定程度上对噪声因子的变化不敏感（即，不确定的岩土参数、荷载参数、施工变化和模型偏差或误差）。鲁棒设计的关键是要有一个可量化的鲁棒性度量，利用它可以有效地进行鲁棒设计优化。基于发展的基于梯度的鲁棒性度量，提出了一个鲁棒设计优化框架。在此框架中，设计（安全）约束进行了分析，使用先进的一阶二阶矩（AFOSM）的方法，考虑噪声因素的变化。设计的鲁棒性，在灵敏度指数（SI）方面，使用系统响应的归一化梯度的噪声f…
This paper presents a gradient-based robustness measure for robust geotechnical design (RGD) that considers safety, design robustness, and cost efficiency simultaneously. In the context of robust design, a design is deemed robust if the system response of concern is insensitive, to a certain degree, to the variation of noise factors (i.e., uncertain geotechnical parameters, loading parameters, construction variation, and model biases or errors). The key to a robust design is a quantifiable robustness measure with which the robust design optimization can be effectively and efficiently implemented. Based on the developed gradient-based robustness measure, a robust design optimization framework is proposed. In this framework, the design (safety) constraint is analyzed using advanced first-order second-moment (AFOSM) method, considering the variation in the noise factors. The design robustness, in terms of sensitivity index (SI), is evaluated using the normalized gradient of the system response to the noise f...