Seite - 1466 - in Book of Full Papers - Symposium Hydro Engineering

Table 2 Calibrated material properties of the masonry and rock Dimension Masonry Intact Rock Density t/m³ 2.2 2.72 E-Modul N/mm² 11100 4697 Poisson ratio - 0.25 0.257 Compressive strength N/mm² 5 20 Friction angle ° 45 45 Cohesion N/mm² 1.0355 4.14 Tensile strength N/mm² 0.5 2 Residual friction angle ° 31.5 31.5 Residual cohesion N/mm² 0.1036 0.4142 Residual tensile strength N/mm² 0 0 Reference temperature °C 10 8 5. STOCHASTIC ANALYSIS Based on the experiences gathered from the stability studies and stochastic analysis from [11] new assessment criteria and more elaborated reliability analyses are carried out using the calibrated FE model. The motivation for the stochastic analysis results from several questions. For example, a stochastic analysis can be used to circumvent contradictions arising from the use of partial safety factors in nonlinear analyses, where questions arise from whether it should be determined by a load-side increase or by a reduction of the resistance. Both approaches aren’t without doubt possible in connection with nonlinear analyzes. By means of a stochastic analysis, failure probabilities can also be determined in the case of nonlinear analyses when introducing load and resistance-side scatterings. This procedure is included in Eurocode EN 1990:2002 (Annex B and C). In a recent and ongoing cooperation between the BAW (Federal Waterways Engineering and Research Institute) and Dynardo, the example of this dam is worked out, including further fundamental investigations, to develop a procedure for practical projects. The stochastic analysis consists of the following steps.  Definition of the scattering of the input parameters.  Generating the samples in ANSYS optiSLang® [9], various methods (Monte Carlo, Latin Hypercube, Directional Sampling, FORM, ...) are available for this purpose.  Definition of evaluation criteria, e.g. Displacements in the abutment, Displacement gradients in the abutment, tilt safety - position of the resultant, sliding safety - principal shear strain, pressure failure - 1466