Robust design in geotechnical engineering – an update
Robust design in geotechnical engineering – an update
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DOI：
10.1080/17499518.2014.980274
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发表时间：
2014-10
期刊：
影响因子：
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通讯作者：
S. Khoshnevisan;W. Gong;Lei Wang;C. Juang
中科院分区：
文献类型：
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作者：
S. Khoshnevisan;W. Gong;Lei Wang;C. Juang
本文提出了一个更新的稳健的岩土工程设计（RGD）方法，它寻求一个最佳的设计方面的设计鲁棒性和成本效益，同时满足安全要求。一般来说，如果系统响应对不确定输入参数（称为“噪声因素”）的变化不敏感，则达到设计鲁棒性。换句话说，如果系统响应表现出很小的变化，即使输入参数变化很大，设计也被认为是鲁棒的。稳健设计通过仔细调整“设计参数”（即，可以由设计者控制的参数，例如几何形状和尺寸），而不降低噪声因子的不确定性。在本文中，现有的RGD方法更新与梯度为基础的鲁棒性措施和简化的过程中寻求拐点。的RGD方法及其简化版本（新的更新）说明了三个设计实例。本文提出的结果表明，RGD方法及其简化版本是有效的设计工具，同时考虑安全性，成本和设计鲁棒性。简化的RGD方法的优点进行了讨论。
This paper presents an update for the robust geotechnical design (RGD) methodology, which seeks an optimal design with respect to design robustness and cost efficiency, while satisfying the safety requirements. In general, the design robustness is achieved if the system response is insensitive to the variation in the uncertain input parameters (called “noise factors”). In other words, a design is considered robust if the system response exhibits little variation, even though there is high variation in the input parameters. Robust design achieves this desirable outcome by carefully adjusting ‘design parameters’ (i.e., the parameters that can be controlled by the designer, such as the geometry and dimensions) without reducing the uncertainty in the noise factors. In this paper, the existing RGD methodology is updated with a gradient-based robustness measure and a simplified procedure for seeking the knee point. The RGD methodology and its simplified version (with new updates) are illustrated with three design examples. The results presented in this paper show that the RGD methodology and its simplified version are effective design tools that considers safety, cost and design robustness simultaneously. The advantages of the simplified RGD approach are discussed.