Reliability-based robust geotechnical design of spread foundations using multi-objective genetic algorithm
Reliability-based robust geotechnical design of spread foundations using multi-objective genetic algorithm
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DOI：
10.1016/j.compgeo.2012.10.003
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发表时间：
2013-03
影响因子：
5.3
通讯作者：
C. H. Juang;Lei Wang
中科院分区：
文献类型：
--
作者：
C. H. Juang;Lei Wang
提出了一种新的岩土设计概念--稳健岩土设计(RGD)。除了满足安全和成本要求外，新的设计方法还寻求实现一定程度的设计健壮性。在这里，如果系统响应的变化对噪声因素的变化不敏感，如不确定的土壤参数和施工质量，则认为设计是稳健的。当考虑多个目标时，可能不存在单一的最佳设计，可能需要进行权衡。在这种情况下，采用遗传算法进行多目标优化，建立了描述给定安全水平下成本与稳健性权衡关系的Pareto前沿。并以扩张式基础设计为例，说明了新的设计方法。论证了RGD方法的重要意义。
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.