Browsing SINTEF Open by Author "Elfgren, Lennart"
Now showing items 1-8 of 8
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3D reconstruction of existing concrete bridges using optical methods
Popescu, Cosmin; Täljsten, Björn; Blanksvärd, Thomas; Elfgren, Lennart (Peer reviewed; Journal article, 2019)Routine bridge inspections usually consist of visual observations. These inspections are time-consuming and subjective. There is a need to identify new inspection techniques for infrastructure that reduce traffic disturbance, ... -
A comparison between laser, scanning, photogrammetry and infrared scanning to create 3D digital models of existing concrete bridges
Popescu, Cosmin; Täljsten, Björn; Blanksvärd, Thomas; Elfgren, Lennart (Chapter, 2020)Routine bridge inspections usually consist of visual observations. These inspections are time-consuming and subjective. There is a need to identify new inspection techniques for infrastructure that reduce traffic disturbance, ... -
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 ... -
Failure tests on concrete bridges: Have we learnt the lessons?
Bagge, Niklas; Popescu, Cosmin; Elfgren, Lennart (Journal article; Peer reviewed, 2017)Full-scale failure tests of bridges are important for improving understanding of bridges’ behaviour and refining assessment methods. However, such experiments are challenging, often expensive, and thus rare. This paper ... -
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 ... -
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 ... -
Remote bridge inspection using optical methods
Popescu, Cosmin; Täljsten, Björn; Blanksvärd, Thomas; Elfgren, Lennart (Chapter, 2022)Routine bridge inspections usually consist of visual observations. These inspections are time-consuming and subjective. There is a need to identify new inspection techniques for infrastructure that reduce traffic disturbance, ...