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A platform for research: civil engineering, architecture and urbanism
A probabilistic and transient finite element analysis of river embankment stability
Probabilistic approaches become more and more popular for the design of embankments and dams in recent years as they provide a degree of safety, which corresponds to the specific structure. Compared to a deterministic approach considering a steady-state, the presented probabilistic and transient analysis of the embankment stability, which takes the variability of the shear strength parameters and the hydraulic characteristics of the river into account, can lead to a rather uncritical pro-bability of failure. In order to take benefit from stability reserves due to transient seepage conditions, realistic hydraulic boundary conditions for the river are used to model the rise and drop of the water level with respect to certain return periods of the flood. To couple the numerical analysis with a probabilistic method, the First Order Reliability Method with Adaptive Response Surface replaces the result of the Finite Element analysis by a polynomial function for a given set of realizations of the stochastic input parameters. For a real embankment at river Elbe in Saxony, Germany, the return period of failure due to slope instability is determined and compared to a probabilistic slip circle analysis considering transient and steady-state seepage.
A probabilistic and transient finite element analysis of river embankment stability
Probabilistic approaches become more and more popular for the design of embankments and dams in recent years as they provide a degree of safety, which corresponds to the specific structure. Compared to a deterministic approach considering a steady-state, the presented probabilistic and transient analysis of the embankment stability, which takes the variability of the shear strength parameters and the hydraulic characteristics of the river into account, can lead to a rather uncritical pro-bability of failure. In order to take benefit from stability reserves due to transient seepage conditions, realistic hydraulic boundary conditions for the river are used to model the rise and drop of the water level with respect to certain return periods of the flood. To couple the numerical analysis with a probabilistic method, the First Order Reliability Method with Adaptive Response Surface replaces the result of the Finite Element analysis by a polynomial function for a given set of realizations of the stochastic input parameters. For a real embankment at river Elbe in Saxony, Germany, the return period of failure due to slope instability is determined and compared to a probabilistic slip circle analysis considering transient and steady-state seepage.
A probabilistic and transient finite element analysis of river embankment stability
Probabilistische und transiente Finite-Elemente-Analyse der Fluss-Eindeichungs-Stabilität
Moellmann, A. (author) / Vermeer, P.A. (author) / Huber, M. (author)
2009
6 Seiten, 10 Bilder, 5 Tabellen, 13 Quellen
Conference paper
English
Damm , Staudamm , Deich , Stabilität , Standsicherheit , Bodenmechanik , Felsmechanik , Scherfestigkeit , Scherspannung , Finite-Elemente-Methode , Näherungsverfahren , numerisches Verfahren , Festigkeitslehre , Festigkeitsberechnung , statische Berechnung , Wahrscheinlichkeit , Polynom , Bruch (Material) , Schaden , Deutschland
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