Browsing SINTEF Open by Author "Sas, Gabriel"
Now showing items 1-20 of 25
-
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 ... -
Assessment of RC walls with cut-out openings strengthened by FRP composites using a rigid-plastic approach
Popescu, Cosmin; Scmidt, Jacob W.; Goltermann, Per; Sas, Gabriel (Journal article; Peer reviewed, 2017)Building refurbishment works frequently require the cutting of new openings in concrete walls. Cutting new openings weakens the overall response of such elements, so they usually require strengthening. However, current ... -
Axially Loaded RC Walls with Cutout Openings Strengthened with FRCM Composites
Sabau, Cristian; Popescu, Cosmin; Sas, Gabriel; Blanksvärd, Thomas; Täljsten, Björn (Journal article; Peer reviewed, 2018)Abstract: Upgrading existing buildings to new functional requirements may require new openings that can weaken the structure, prompting the need for strengthening. In such cases traditional strengthening solutions, such ... -
Concrete walls with cutout openings strengthened by FRP confinement
Popescu, Cosmin; Sas, Gabriel; Blanksvärd, Thomas; Täljsten, Björn (Peer reviewed; Journal article, 2017)Redesigning buildings to improve their space efficiency and allow changes in use is often essential during their service lives to comply with shifts in living standards and functional demands. This may require the introduction ... -
Effect of Confinement with FRCM Composites on Damaged Concrete Cylinders
Gonzalez-Libreros, Jaime; Sabau, Cristian; Sneed, Lesley H.; Sas, Gabriel; Pellegrino, Carlo (Journal article; Peer reviewed, 2017)Confinement of axially loaded concrete members in existing structures is required when a change in use is expected or when there is a need to upgrade the structure to meet current design standards. In addition, after unusual ... -
Experimental study on shear deformation of reinforced concrete beams using digital image correlation
Huang, Zheng; Tu, Yongming; Meng, Shaoping; Sabau, Cristian; Popescu, Cosmin; Sas, Gabriel (Journal article; Peer reviewed, 2019)This paper presents an experimental program aimed at providing reliable and comprehensive experimental data for assessing the available models of predicting the shear deformation of diagonally-cracked reinforced concrete ... -
Finite element analysis of shear deformation in reinforced concrete shear-critical beams
Huang, Zheng; Lü, Zhitao; Tu, Yongming; Blanksvärd, Thomas; Sas, Gabriel; Elfgren, Lennart (Journal article; Peer reviewed, 2017)The objective of this paper was to study the contribution of shear deformation in reinforced concrete (RC) shear-critical beams. A 2D concrete material model based on smeared fixed crack was presented and incorporated into ... -
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 ... -
Local and global behavior of walls with cut-out openings in multi-story reinforced concrete buildings
Sabau, Cristian; Popescu, Cosmin; Bagge, Niklas; Sas, Gabriel; Blanksvärd, Thomas; Täljsten, Björn (Journal article; Peer reviewed, 2019)This paper presents the finite element analysis (FEA) results of a multi-story reinforced concrete (RC) building having precast and cast-in-place load bearing walls. Door-type cut-out openings (height: 2.1 m, width: 0.9–4.4 ... -
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 ... -
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) -
Performance of RC Walls with Openings Strengthened by Fiber Reinforced Polymers: An Experimental and Theoretical Investigation
Popescu, Cosmin; Sas, Gabriel; Blanksvärd, Thomas; Täljsten, Björn (Chapter, 2017)Redesigning buildings to improve their space efficiency and allow changes in use is often essential during their service lives to comply with shifts in living standards and functional demands. This may require the introduction ... -
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 ... -
Review of FRCM strengthening solutions for structural wall panels
Sabau, Cristian; Popescu, Cosmin; Sas, Gabriel; Blanksvärd, Thomas; Täljsten, Björn (Chapter, 2018)This paper summarizes the state-of-the-art on the topic of structural wall panels strengthened using fabric reinforced cementitious matrix composites (FRCM) composites. A systematic review of the literature is carried out ...