Probabilistic geotechnical engineering analysis based on first order reliability method
Limit equilibrium engineering analysis needs the incorporation of probabilistic approaches for the determination of soil strength statistical measures for deterministic and probabilistic analyses. For the commonly used Mohr�Coulomb strength model, the uncertainty and the characteristic values of coh...
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| Format: | Article |
| Language: | English |
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Gruppo Italiano Frattura
2019-10-01
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| Series: | Fracture and Structural Integrity |
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| Online Access: | https://www.fracturae.com/index.php/fis/article/view/2603/2737 |
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| author | Georgios Belokas University of West Attica, Greece |
| author_facet | Georgios Belokas University of West Attica, Greece |
| author_sort | Georgios Belokas University of West Attica, Greece |
| collection | DOAJ |
| description | Limit equilibrium engineering analysis needs the incorporation of probabilistic approaches for the determination of soil strength statistical measures for deterministic and probabilistic analyses. For the commonly used Mohr�Coulomb strength model, the uncertainty and the characteristic values of cohesion (c) and angle of shearing resistance (f) determination is not straight¬¬forward. This paper applies the first order reliability method (FORM) to estimate these values from the direct shear and the typical triaxial tests. The method is verified with test data. Furthermore, the FORM is applied to the planar failure limit equilibrium problem to determine the statistical measures of the safety margin (SM) and safety factor (SF). It is observed that the critical slip surface for the best estimate of the mean (SMm, SFm), for a 5% probability of exceedance (SMp=5%, SFp=5%) and for the characteristic value (SMk, SFk) do not coincide. It is interesting that the maximum probability of having a SM min 0 or=null SF="" min 1 does="" not="" correspond="" to="" the="" minimum="" best="" estimate="" of="" the="" SM="" or="" SF.="" FORM="" can="" be="" a="" very="" useful="" tool="" for="" complete="" probabilistic="" analyses.="" Further¬more="", probabilistic="" approaches="" applied="" to="" soil="" properties="" estimation="" can="" set="" a="" framework="" for="" the="" selection="" of="" their="" characteristic="" values="" for="" deterministic="" analyses.="" |
| format | Article |
| id | doaj-art-9e907c518e7a4b4aad77fdaeed8c5047 |
| institution | Kabale University |
| issn | 1971-8993 |
| language | English |
| publishDate | 2019-10-01 |
| publisher | Gruppo Italiano Frattura |
| record_format | Article |
| series | Fracture and Structural Integrity |
| spelling | doaj-art-9e907c518e7a4b4aad77fdaeed8c50472025-01-03T00:26:58ZengGruppo Italiano FratturaFracture and Structural Integrity1971-89932019-10-01135035436910.3221/IGF-ESIS.50.3010.3221/IGF-ESIS.50.30Probabilistic geotechnical engineering analysis based on first order reliability methodGeorgios Belokas University of West Attica, GreeceLimit equilibrium engineering analysis needs the incorporation of probabilistic approaches for the determination of soil strength statistical measures for deterministic and probabilistic analyses. For the commonly used Mohr�Coulomb strength model, the uncertainty and the characteristic values of cohesion (c) and angle of shearing resistance (f) determination is not straight¬¬forward. This paper applies the first order reliability method (FORM) to estimate these values from the direct shear and the typical triaxial tests. The method is verified with test data. Furthermore, the FORM is applied to the planar failure limit equilibrium problem to determine the statistical measures of the safety margin (SM) and safety factor (SF). It is observed that the critical slip surface for the best estimate of the mean (SMm, SFm), for a 5% probability of exceedance (SMp=5%, SFp=5%) and for the characteristic value (SMk, SFk) do not coincide. It is interesting that the maximum probability of having a SM min 0 or=null SF="" min 1 does="" not="" correspond="" to="" the="" minimum="" best="" estimate="" of="" the="" SM="" or="" SF.="" FORM="" can="" be="" a="" very="" useful="" tool="" for="" complete="" probabilistic="" analyses.="" Further¬more="", probabilistic="" approaches="" applied="" to="" soil="" properties="" estimation="" can="" set="" a="" framework="" for="" the="" selection="" of="" their="" characteristic="" values="" for="" deterministic="" analyses.=""https://www.fracturae.com/index.php/fis/article/view/2603/2737soil strengthgeotechnical engineeringprobabilistic approachesreliabilitycharacteristic values |
| spellingShingle | Georgios Belokas University of West Attica, Greece Probabilistic geotechnical engineering analysis based on first order reliability method Fracture and Structural Integrity soil strength geotechnical engineering probabilistic approaches reliability characteristic values |
| title | Probabilistic geotechnical engineering analysis based on first order reliability method |
| title_full | Probabilistic geotechnical engineering analysis based on first order reliability method |
| title_fullStr | Probabilistic geotechnical engineering analysis based on first order reliability method |
| title_full_unstemmed | Probabilistic geotechnical engineering analysis based on first order reliability method |
| title_short | Probabilistic geotechnical engineering analysis based on first order reliability method |
| title_sort | probabilistic geotechnical engineering analysis based on first order reliability method |
| topic | soil strength geotechnical engineering probabilistic approaches reliability characteristic values |
| url | https://www.fracturae.com/index.php/fis/article/view/2603/2737 |
| work_keys_str_mv | AT georgiosbelokasuniversityofwestatticagreece probabilisticgeotechnicalengineeringanalysisbasedonfirstorderreliabilitymethod |