Blar i NTNU Open på forfatter "Johansson, Fredrik"
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Influence of concrete’s mechanical properties on the cracking of concrete dams
Ulfberg, Adrian; Seger, Andreas; Bista, Dipen; Wilde, Marie Westberg; Johansson, Fredrik; Das, Oisik; Sas, Gabriel (Chapter, 2021)Analytical methods of structural stability assessment of concrete dams are often too simple and thus conservative in their predictions.Without the actual foundation geometry, capacity for some rigid body failure modes are ... -
Influence of location of large-scale asperity on shear strength of concrete-rock interface under eccentric load
Bista, Dipen; Sas, Gabriel; Johansson, Fredrik; Lia, Leif (Peer reviewed; Journal article, 2020)The location and geometry of large-scale asperity present at the foundation of concrete gravity dams and buttress dams affect the shear resistance of the concrete-rock interface. However, the parameters describing the ... -
Numerical parametric study on the influence of location and inclination of large-scale asperities on the shear strength of concrete-rock interfaces of small buttress dams
Bista, Dipen; Ulfberg, Adrian; Lia, Leif; Gonzalez-Libreros, Jaime; Johansson, Fredrik; Sas, Gabriel (Peer reviewed; Journal article, 2024)When assessing the sliding stability of a concrete dam, the influence of large-scale asperities in the sliding plane is often ignored due to limitations of the analytical rigid body assessment methods provided by current ... -
Probabilistic finite element analysis of failures in concrete dams with large asperities in the rock–concrete interface
Ulfberg, Adrian; Gonzalez-Libreros, Jaime; Das, Oisik; Bista, Dipen; Westberg Wilde, Marie; Johansson, Fredrik; Sas, Gabriel (Peer reviewed; Journal article, 2023)Common analytical assessment methods for concrete dams are unlikely to predict material fracture in the dam body because of the assumption of rigid body behavior and uniform- or linear stress distribution along a predetermined ...