Page - 1468 - in Book of Full Papers - Symposium Hydro Engineering

The exceedance probability of the reliability analysis for the limit value of V_1 = 0.05 m gives a Pf(V_1) = 1.59* 10-13; which corresponds to a reliability index β(V_1) = 7.29. The result of the reliability analysis for the limit value V_2 = 0.03 m is shown in Fig. 7. The determined exceedance probability is Pf(V_2) = 1.59*10-7; this corresponds to a reliability index β(V_2) = 5.11 As a result of the analyses, it can be stated that both probabilities are below the value of Pf = 10-5, corresponding to reliability indexes above β = 4.27 (Reference period of 100 years). Thus, by using probabilistic analyses and procedures described in the report, a sufficient stability of the Eder dam can be confirmed and the safety margins beyond are quantified. In addition to the calculation of the probability of failure, the influencing parameters which are decisive for the distribution of the response variable can be output both qualitatively and quantitatively in ANSYS optiSLang® [9]. This allows statements to be made as to which stray input variables (loads, resistances) are relevant for the failure of the dam. 6. ACKNOWLEDGEMENTS The financial and technical support by BAW (Federal Waterways Engineering and Research Institute) is gratefully acknowledged. REFERENCES [1] FLEISCHER H., FRÖBISCH H.-J. 100 Jahre Edertalsperre – Untersuchungen zur Standsicherheit der Staumauer. BAW Kolloquium Berechnungen und Analysen für bestehende Wasserbauwerke, Karlsruhe, 2014. [2] HESSISCHES LANDESAMT FÜR BODENFORSCHUNG Ingenieur- geologisches Gutachten. Hessisches Landesamt für Bodenforschung 345 - 310/85 Hz/Str, 1985. [3] HESSISCHES LANDESAMT FÜR BODENFORSCHUNG Geologisches Ergänzungs-Gutachten. Hessisches Landesamt für Bodenforschung 345 - 36/92 Hz/Bm, 1992. [4] EDERTALSPERRE Festschrift, Herausgegeben aus Anlaß der Wiederherstellung der Staumauer, Wasser- und Schiffahrtsverwaltung des Bundes, Wasser- und Schiffahrtsdirektion, Mitte Hannover, 1994. [5] HOLTZ S. Die geologischen Verhältnisse [4]. 1994, Beitrag 3, S.24-25, Hannover. [6] WITTKE W. Standsicherheitsberechnungen der Ederstaumauer nach der FE-Methode [4]. 1994, Beitrag 5, S.29-35, Hannover. 1468