Journal
COMPUTERS AND GEOTECHNICS
Volume 48, Issue -, Pages 96-106Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compgeo.2012.10.003
Keywords
Reliability; Uncertainty; Failure probability; Limit states; Optimization; Robust design; Spread foundations
Categories
Funding
- National Science Foundation [CMMI-1200117]
- Glenn Department of Civil Engineering, Clemson University
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [1200117] Funding Source: National Science Foundation
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This paper presents a new geotechnical design concept, called robust geotechnical design (RGD). The new design methodology seeks to achieve a certain level of design robustness, in addition to meeting safety and cost requirements. Here, a design is considered robust if the variation in the system response is insensitive to the variation of noise factors such as uncertain soil parameters and construction quality. When multiple objectives are considered, a single best design may not exist, and a trade-off may be necessary. In such a case, a genetic algorithm is adopted for multi-objective optimization and a Pareto Front, which describes a trade-off relationship between cost and robustness at a given safety level, is established. The new design methodology is illustrated with an example of spread foundation design. The significance of the RGD methodology is demonstrated. (C) 2012 Elsevier Ltd. All rights reserved.
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