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RELIABILITY ANALYSIS OF BEARING CAPACITY FOR SHALLOW FOUNDATIONS BASED ON EUROCODE 7 (2011)
In Eurocode 7, the application of statistical methods and reliability analyses is encouraged though not much guidance is clearly given for the practitioner. Reliability analyses can effectively model parameter uncertainty and provide more meaningful results in terms of a reliability index and probability of failure. The current work focuses on the development of a methodology for calculating bearing resistance using reliability analysis, in terms of Eurocode 7. Random fields of soil cohesion and friction angle are generated and converted to characteristic values for checking the GEO failure criterion in ULS. The analysis is performed for a simple example of a shallow foundation, comparing the methods of Monte Carlo simulation and First Order Reliability Methods. For both methods the reliability index and probability of failure were determined. It was found that both methods can be applied for an increasing uncertainty in friction angle though FORM results for low uncertainty are closer to the deterministic solution than Monte Carlo simulation.
ISGSR 2011 - Vogt, Schuppener, Straub & Bräu (eds) - © 2011 Bundesanstalt für Wasserbau
Frederick University, Nicosia, Cyprus