建立在相对安全率准则基础上的岩土工程可靠度分析与安全判据

doi:10.13722/j.cnki.jrme.2017.1302

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Abstract Calibrating safety criteria by the First Order Second Moment Method is a standard approach specified in codes. EuroCode I refers it as the‘Level II approach’. This paper presents a criterion called‘Ratio of safety margin’that is used to assess the universal applicability of a calibrated safety criteria based on the target reliability index. Following a brief review of the theoretical background described in the existing codes，the author calibrated the equivalent factors of safety and partial factors based a target reliability index on a selected test example by the First Order Second Moment Method. The calibrated safety criterion was then examined by varying all the related geometrical and physical parameters of this selected example，making sure that the values of ?R，?F，and ?P are approximately same. Formulations have been given for defining the‘Ratio of safety margin’designated ? for reliability index，factors of safety，and partial factors with subscripts R，F，P respectively. Having passed this universal applicability test，the calibrated values have been promoted for practical application with more confidence. The author reviews its successful applications in the area of stability analysis for embankment dams，reinforced slopes，retaining walls，and concrete gravity and arch dams. The author summarizes the calibrated acceptable factors of safety and partial factors in these areas associated with the required reliability indices.

Key words： geotechnical engineering reliability analysis reliability index factor of safety partial factor ratio of safety margin

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	CHEN Zuyu

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CHEN Zuyu. Reliability analysis and safety criterion in geotechnical engineering based on the index of safety margin[J]. , 2018, 37(3): 521-544.

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http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2017.1302 OR http://www.rockmech.org/EN/Y2018/V37/I3/521

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