VERTICAL CAPACITY OF PILES USING FUZZY SETS

Abstract Because prediction of the load-carrying capacity of piles continues to challenge geo-technical engineers, new solutions are needed. The problem is aggravated by the lack of understanding of the phenomena of soil-pile interaction, and the limited quantity and inexact quality of subsurface soil information that can be provided for analysis. The use of fuzzy set theory improves the engineer's ability to handle the uncertainty in the soil parameters and the prediction methods and thus improves the reliability of the pre dicted capacity. A methodology for predicting pile capacity based on fuzzy set theory is developed and implemented in a computer program. The validity of the program re sults is evaluated using a US Federal Highway Administration (FHWA) pile load test database. The comparison between predicted and measured ultimate capacities of piles in sand, clay and mixed soils shows that the predictive capability of the developed program is very good.

[1]  R. L. Nordlund,et al.  Bearing Capacity of Piles in Cohesionless Soils , 1963 .

[2]  C. H. Juang,et al.  MODEL FOR CAPACITY OF SINGLE PILES IN SAND USING FUZZY SETS. DISCUSSION. CLOSURE , 1991 .

[3]  Harry M. Coyle,et al.  NEW DESIGN CORRELATIONS FOR PILES IN SAND , 1981 .

[4]  V. N. Vijayvergiya,et al.  A New Way to Predict Capacity of Piles in Clay , 1972 .

[5]  F. S. Wong,et al.  Fuzzy weighted averages and implementation of the extension principle , 1987 .

[6]  B H Fellenius.  THE ANALYSIS OF RESULTS FROM ROUTINE PILE LOAD TESTS , 1980 .

[7]  A S Vesic,et al.  DESIGN OF PILE FOUNDATIONS , 1977 .

[8]  C. H. Juang,et al.  DETERMINING RELATIVE DENSITY OF SANDS FROM CPT USING FUZZY SETS , 1996 .

[9]  David J. Elton,et al.  A Practical Approach to Uncertainty Modeling in Geotechnical Engineering , 1996 .

[10]  David J. Elton,et al.  Fuzzy information processing by the Monte Carlo simulation technique , 1991 .

[11]  Robert V. Whitman,et al.  EVALUATING CALCULATED RISK IN GEOTECHNICAL ENGINEERING , 1984 .

[12]  J. Christian,et al.  Reliability Applied to Slope Stability Analysis , 1994 .

[13]  Tien H. Wu,et al.  Safety Analysis of Slopes , 1970 .

[14]  Miltan Edward. Harr,et al.  Mechanics of particulate media : a probabilistic approach , 1977 .

[15]  David E. Burmaster,et al.  Assessment of Variability and Uncertainty Distributions for Practical Risk Analyses , 1994 .

[16]  C. H. Juang,et al.  REPRESENTATION, PROCESSING, AND INTERPRETATION OF FUZZY INFORMATION IN CIVIL ENGINEERING , 1993 .

[17]  J. C. R. Hunt.  Searching for certainty , 1995, Nature.

[18]  D. C. Tobutt,et al.  The reliability of earth slopes , 1979 .

[19]  F. O. Hoffman,et al.  Propagation of uncertainty in risk assessments: the need to distinguish between uncertainty due to lack of knowledge and uncertainty due to variability. , 1994, Risk analysis : an official publication of the Society for Risk Analysis.

[20]  A. Kaufmann,et al.  Introduction to fuzzy arithmetic : theory and applications , 1986 .

[21]  C. H. Juang,et al.  A group decision-making model for siting LULUs , 1995 .

[22]  Wilson H. Tang,et al.  Probability concepts in engineering planning and design , 1984 .

[23]  Eulalia Szmidt,et al.  Fuzzy thinking. The new science of fuzzy logic , 1996 .

[24]  B. Kosko.  Fuzzy Thinking: The New Science of Fuzzy Logic , 1993 .

[25]  Tien H. Wu,et al.  Uncertainty, Safety, and Decision in Soil Engineering , 1974 .

[26]  W. E. Johnson,et al.  ROLE OF THE CALCULATED RISK IN EARTHWORK AND FOUNDATION ENGINEERING , 1966 .

[27]  Richard J. Finno.  Predicted and Observed Axial Behavior of Piles: Results of a Pile Prediction Symposium , 1989 .

[28]  D. H. Lee,et al.  Mapping Slope Failure Potential Using Fuzzy Sets , 1992 .

[29]  Michael Tomlinson,et al.  Pile Design and Construction Practice , 2015 .

[30]  David J. Elton,et al.  Liquefaction Susceptibility Evaluation Using Fuzzy Sets. , 1995 .

[31]  Jean-Louis Briaud,et al.  Piles in Sand: A Method Including Residual Stresses , 1984 .

[32]  Frank Rausche,et al.  DESIGN AND CONSTRUCTION OF DRIVEN PILE FOUNDATIONS - VOLUME I , 1997 .

[33]  Haresh C. Shah,et al.  Fuzzy information processing in seismic hazard analysis and decision making , 1987 .

[34]  Joseph E. Bowles,et al.  Foundation analysis and design , 1968 .