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Browsing SINTEF Open by Author "Elfgren, Lennart"

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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, ...
    • 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 ...

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