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AN AGGREGATED FUZZY RELIABILITY INDEX FOR SLOPE STABILITY ANALYSIS | ||
| Iranian Journal of Fuzzy Systems | ||
| مقاله 4، دوره 1، شماره 1، تیر 2004، صفحه 17-31 اصل مقاله (339.33 K) | ||
| نوع مقاله: Research Paper | ||
| شناسه دیجیتال (DOI): 10.22111/ijfs.2004.491 | ||
| نویسندگان | ||
| MEHRASHK MEIDANI1؛ GHASSEM HABIBAGAHI2؛ SERAJEDIN KATEBI* 3 | ||
| 1MEHRASHK MEIDANI, PHD STUDENT, CIVIL ENGINEERING DEPARTMENT, SCHOOL OF ENGINEERING, SHIRAZ UNIVERSITY, SHIRAZ, IRAN | ||
| 2ASSOCIATE PROF., CIVIL ENGINEERING DEPARTMENT, SCHOOL OF ENGINEERING, SHIRAZ UNIVERSITY, SHIRAZ, IRAN | ||
| 3DEPARTMENT OF COMPUTER SCIENCE, SCHOOL OF ENGINEERING, SHIRAZ UNIVERSITY, SHIRAZ, IRAN | ||
| چکیده | ||
| While sophisticated analytical methods like Morgenstern-Price or finite element methods are available for more realistic analysis of stability of slopes, assessment of the exact values of soil parameters is practically impossible. Uncertainty in the soil parameters arises from two different sources: scatter in data and systematic error inherent in the estimate of soil properties. Hence, stability of a slope should be expressed using a factor of safety accompanied by a reliability index. In this paper, the theory of fuzzy sets is used to deal simultaneously with the uncertain nature of soil parameters and the inaccuracy involved in the analysis. Soil parameters are defined using suitable fuzzy sets and the uncertainty inherent in the value of factor of safety is assessed accordingly. It is believed that this approach accounts for the uncertainty in soil parameters more realistically compared to the conventional probabilistic approaches reported in the literature. A computer program is developed that carries out the large amount of calculations required for evaluating the fuzzy factor of safety based on the concept of domain interval analysis. An aggregated fuzzy reliability index (AFRI) is defined and assigned to the calculated factor of safety. The proposed method is applied to a case study and the results are discussed in details. Results from sensitivity analysis describe where the exploration effort or quality control should be concentrated. The advantage of the proposed method lies in its fast calculation speed as well as its ease of data acquisition from experts’ opinion through fuzzy sets. | ||
| کلیدواژهها | ||
| Slope Stability؛ Uncertainty؛ Fuzzy sets؛ reliability | ||
| مراجع | ||
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[1] M. Andonyadis, A. G. Altschaeffl and J. L. Chameau, “Fuzzy sets in pavement evaluation and management: Application and interpretation.” FHWA/IN/JHRP report #85-14, School of Civil Engrg., Purdue Univ., (1985). [2] B. M. Ayyub, Uncertainty Modeling and Analysis in Civil Engineering, CRC Press, Boca Raton, Florida, (1998). [3] E. N. Broomhead, The Stability of Slopes, Surrey Univ. Press, Chapman and Hall, New York, (1986). [4] T. B. Celestino and J. M. Duncan, Simplified search for non-circular slip surface, Proc., 10th Int. Conf. on Soil Mech. and Found. Engrg., A. A. Balkema, Rotterdam, The Netherlands, 3 (1981) 391-394. [5] R. N. Chowdhury, and D. A-Grivas, Probabilistic model of progressive failure of slopes, J. Geotech. Engrg. Div., ASCE, 108(6) (1982) 803-819. [6] R. N. Chowdhury and D. H. Xu, Slope system reliability with general slip surfaces, Soils and Foundations, 34(3) (1994) 99-105. [7] J. T. Christian, C. C. Ladd and G. B. Baecher, Reliability applied to slope stability analysis, J. Geotech. Engrg., ASCE, 120(12) (1994) 2180-2207. [8] J. T. Christian, C. C. Ladd and G. B. Baecher, Reliability and probability in stability analysis, Proc., Stability and Performance of Slopes and Embankments-II, ASCE, New York, N.Y., Vol. 2 (1992) 1071-1111. [9] W. M. Dong, H. C. Shah and F. S. Wang, Fuzzy computations in risk and decision analysis, Civ. Engng. Syst., Vol. 2, Dec. (1985) 201-208. [10] J. M. Duncan, State of the art: limit equilibrium and finite element analysis of slopes, J. Geotech. Engrg., ASCE, 122(7) (1996) 577-596. [11] R. B. Gilbert, S. G. Wright and E. Liedtke, Uncertainty in back analysis of slopes: Kettleman Hills case history, J. Geotech. Engrg., ASCE, 124(12) (1998) 1167-1176. [12] S. Gui, R. Zhang, J. P. Turner and X. Xue, Probabilistic slope stability analysis with stochastic soil hydraulic conductivity, J. Geotech. Engrg., ASCE, 126(1) (2000) 1-9. [13] A. M. Hassan and T. F. Wolff, Search algorithm for minimum reliability index of earth slopes, J. Geotech. Engrg., ASCE, 125(4) (1999) 301-308. [14] C. H. Juang, J. L. Way and D. J. Elton, Model for capacity of single piles in sand using fuzzy sets, J. Geotech. Engrg., ASCE, 117(2) (1991) 1920-1931. [15] K. S. Li, and P. Lumb, Probabilistic design of slopes, Can. Geotech. J., Vol. 24 (1987) 520- 535. [16] B. K. Low and W. H. Tang, Probabilistic slope analysis using Janbu’s generalized procedure of slices, Computers and Geotechnics, 21(2) (1997) 121-142. [17] N. R. Morgenstern and V. E. Price, The analysis of the stability of general slip surfaces, Geotechnique, Vol. 15, (1965). [18] T. J. Ross, Fuzzy Logic with Engineering Applications, McGraw Hill Inc., (1995). [19] A. W. Skempton and D. J. Coats, Carsington dam failure, Failures in Earthworks, Proc. of the symp. on Failures in Earthworks, Thomas Telford Ltd., London, (1985). [20] S. Soulati, “A Gentic approach for determining the generalized interslice forces and the critical noncircular slip surface for slope stability analysis”, Thesis submitted to the School of Graduate studies in Partial Fulfillment of the Requirements for the Degree of Mater of Science, Shiraz University, Shiraz, Iran, (2003). [21] E. Spencer, Circular and logarithmic spiral slip surfaces, J. Soil Mech. And Found. Div., ASCE, 95(1) (1969) 929-942. [22] E. Spencer, Slip circles and critical shear planes, J. Geotech. Engrg. Div., ASCE, 107(7) (1981) 929-942. [23] W. H. Tang, M. S. Yucemen and A. H.-S. Ang, Probability-based short term design of slopes, Can. Geotech. J., 13(3) (1976) 201- 215. [24] E. H. Vanmarcke, Reliability of earth slopes, J.Geotech. Engrg. Div., ASCE, 103(11) (1977) 1227- 1246. [25] R. V. Whitman, Evaluating calculated risk in geotechnical engineering, J. Geotech. Engrg., ASCE, 110(2) (1984) 145-188. [26] L. A. Zadeh, Fuzzy sets, Information and Control, 8 (1965) 338-353. [27] H. J. Zimmermann, Fuzzy Set Theory and Its Applications, Kluwer Academic Publishers, (1996). | ||
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