Analysis Verification of Capanda Dam Using Diana Finite Element Model

2. Group of Hydrology and Water Resources, Faculty of Engineering, Agostinho Neto University, Angola

 Abstract: This paper aims to analyze the horizontal displacements of Capanda DAM by using 3D DIANA Finite Element Analysis, which suits its complex shell structure. The model was also used to analyze the behavior of the DAM by considering both the hydrostatic pressure and geotechnical characterization, afterwards, it was noted that the loads changed and the code was more restricted in its design formulae. In addition, loads are defined in the database according to software closed codes. In this research, Capanda DAM is fully described by gravity type in reinforced concrete, with a length of 1200 meters, with a maximum height of 110.2 meters, crown height at 953.2 meters altitude, with 4 Francis type turbines of 130 MW each, totaling an installed power of 520 MW. The DIANA model is commonly used to perform nonlinear analysis but, in this research, the model was first used to perform a linear design calculation, then a reading of the data and the setting of the Finite Element Model is done by the application. Based on the input of static and movable loads, a loading generator makes all the load (combinations); Run-throughs of the linear analyses, the creation of envelopes, the constant spreading and shifting of moments, and the consideration of shear forces are all done. The proper loads on the model and controlling output components for the various envelope tests. A second comparison of the 3D calculations outcomes revealed that refined mesh provides more accurate results of displacements. For bending moments and shear forces, this is distinct. The cross-section capacities are then compared to all moments and shear pressures.