Blar i NTNU Open på forfatter "Bista, Dipen"
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Concrete Dams Constructed on Soil Materials
Bista, Dipen (Master thesis, 2015)Rock may not always be encountered at economical depth to have foundation dam on it. It is a typical situation in Nepal where several meters deep alluvium is expected before reaching competent rock. Several dams have been ... -
Concrete Dams Constructed on Soil Materials
Bista, Dipen (Master thesis, 2015)Rock may not always be encountered at economical depth to have foundation dam on it. It is a typical situation in Nepal where several meters deep alluvium is expected before reaching competent rock. Several dams have been ... -
Influence from Asperities - Modelling of Laboratory Test
Steen, Sigurd Sætherø (Master thesis, 2017)Traditional stability analysis of concrete dams is based on the Mohr-Coulomb failure criteria with a peak friction angle to find the shear capacity. The peak friction angle is often in the range between 40 and 50 degrees, ... -
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 large-scale asperities on the shear strength of concrete-rock interface of small buttress dams
Sas, Gabriel; Popescu, Cosmin; Bista, Dipen; Seger, Andreas; Arntsen, Bård (Peer reviewed; Journal article, 2021)This paper presents an investigation of the influence of large-scale asperities on the shear strength of four physical models of a pillar (also known as buttress web)from Kalhovd dam in Norway. The objective was to observe ... -
Influence of large-scale asperities on the stability of concrete dams
Ulfberg, Adrian; Jaime, Gonzales-Libreros; Das, Oisik; Sas, Gabriel; Andersson, Erik; Bista, Dipen; Arntsen, Bård; Seger, Andreas (Chapter, 2022)For concrete dams founded on rock, there are only a few options in the common analysis methods to account for large‐scale asperities. However, previous research alludes that they have a significant impact on the behaviour ... -
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 ... -
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 ... -
Shear strength of the rock-concrete interface at Kalhovd dam
Stangvik, Renate Musum (Master thesis, 2017)The shear strength criteria Mohr-Coulomb is often used to calculate the shear capacity of rock-concrete interfaces due to its simplicity. However, the shear strength criterion does not consider all relevant aspects that ...