Blar i Publikasjoner fra Cristin - SINTEF Narvik på forfatter "Sas, Gabriel"
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A review of concrete properties under the combined effect of fatigue and corrosion from a material perspective
Liu, Dongyun; Wang, Chao; Gonzalez-Libreros, Jaime; Guo, Tong; Cao, Jie; Tu, Yongming; Elfgren, Lennart; Sas, Gabriel (Peer reviewed; Journal article, 2023)When in use, reinforced concrete bridge structures not only experience high-frequency fatigue loading caused by passing vehicles, but also suffer from the effects of a corrosive environment. In addition to fatigue damage ... -
Adapting to climate change: snow load assessment of snow galleries on the Iron Ore Line in Northern Sweden
Saback, Vanessa; Gonzalez-Libreros, Jaime; Daescu, Cosmin; Popescu, Cosmin; Garmabaki, A.H.S.; Sas, Gabriel (Peer reviewed; Journal article, 2024)The snow galleries along the Iron Ore railway line in Northern Sweden have faced problems in recent years due to increasingly large snow loads, and several galleries have been damaged. These incidents motivated an evaluation ... -
Freeze-thaw damage evaluation and model creation for concrete exposed to freeze–thaw cycles at early-age
Liu, Dongyun; Tu, Yongming; Sas, Gabriel; Elfgren, Lennart (Peer reviewed; Journal article, 2021)Concrete subjected to freeze–thaw cycles action at early-age will suffer serious physical damage, resulting in degradation of the concrete’s performance. The subsequent curing conditions after early-age freeze–thaw cycles ... -
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 (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 ... -
Mechanical and durability properties of concrete subjected to early-age freeze–thaw cycles
Liu, Dongyun; Tu, Yongming; Shi, Pan; Sas, Gabriel; Elfgren, Lennart (Peer reviewed; Journal article, 2021)Early-age frost damage to concrete used in winter construction or in cold environments negatively affects the development of the hydration process and the performance of the concrete, thereby reducing the service life of ... -
Post-peak behavior of concrete dams based on nonlinear finite element analyses
Enzell, Jonas; Ulfberg, Adrian; Sas, Gabriel; Malm, Richard (Peer reviewed; Journal article, 2021)Dam failures are catastrophic events and in order to improve safety, engineers must have good tools for analysis and an understanding of the failure process. Since there are few cases of real failures in concrete dams, ... -
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 ... -
Semi‑autonomous inspection for concrete structures using digital models and a hybrid approach based on deep learning and photogrammetry
Mirzazade, Ali; Popescu, Cosmin; Gonzalez-Libreros, Jaime; Blanksvärd, Thomas; Täljsten, Björn; Sas, Gabriel (Peer reviewed; Journal article, 2023)Bridge inspections are relied heavily on visual inspection, and usually conducted within limited time windows, typically at night, to minimize their impact on traffic. This makes it difficult to inspect every meter of the ...