| 摘要: | 摘要： The variability of shear characteristics of rock discontinuities is often difficult to ascertain. Thus, even with the reliability-based design (RBD) approach, which allows for consideration of the uncertainty of input parameters, the design of a rock slope system may be either cost-inefficient (overdesign) or unsafe (under-design), depending on whether the variation of input parameters is overestimated or underestimated. The uncertainty about the variation of input parameters is a critical issue in a RBD. This paper presents a feasible approach to addressing this problem using robust design concept. First, the uncertainty of the estimated statistics of input parameters (such as rock properties) is represented by fuzzy sets, which requires only the knowledge of lower and upper bounds of the estimated statistics. Then, the robust design concept is implemented to ensure that the final design is insensitive to, or robust against, the uncertainty of the estimated statistics of input parameters. The design methodology is demonstrated with an application to the design of a rock slope system with multiple failure modes. This design methodology, termed robust geotechnical design (RGD), aims to achieve a certain level of design robustness, in addition to meeting safety and cost requirements. In this paper, the RGD framework is realized through a multi-objective optimization, as it involves three requirements, safety, cost, and robustness. The significance of the design methodology is demonstrated with an example of rock slope design.
其他題名： Environ Earth Sci
出版者： Berlin/Heidelberg: Springer-Verlag
出版日期： 2014-10-01
出處： Environmental earth sciences, 2014-10, Vol.72 (8), p.2957-2969
資源來源： SpringerLink Journals
版權： Springer-Verlag Berlin Heidelberg 2014
版權： 2015 INIST-CNRS
識別號： ISSN: 1866-6280
識別號： EISSN: 1866-6299
識別號： DOI: 10.1007/s12665-014-3201-1 |
