Karin Lundgren
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View article: Characterisation of steel corrosion and matrix damage in reinforced mortar combining analytical, electrical and image-based techniques
Characterisation of steel corrosion and matrix damage in reinforced mortar combining analytical, electrical and image-based techniques Open
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View article: Textile reinforced concrete members subjected to tension, bending, and in-plane loads: Experimental study and numerical analyses
Textile reinforced concrete members subjected to tension, bending, and in-plane loads: Experimental study and numerical analyses Open
Textile reinforced concrete has raised increasing research interest during the last years, mainly due to its potential to be used for freeform shell structures involving complex load situations. Yet, most experimental work has focused on t…
View article: Monitoring corrosion-induced concrete cracking adjacent to the steel-concrete interface
Monitoring corrosion-induced concrete cracking adjacent to the steel-concrete interface Open
Substantial research effort has been devoted on linking corrosion-induced cracking of concrete with the internal corrosion damage level. Still, numerical models of the corrosion and cracking process require internal parameters, that cannot…
View article: Recent development in quantum refinement of protein structures
Recent development in quantum refinement of protein structures Open
In standard crystallographic refinement of biomacromolecules, the experimental data is normally not enough to unambiguously decide the positions of all atoms.Therefore, the crystallographic data are supplemented by a set of empirical restr…
View article: A two-stage study of steel corrosion and internal cracking revealed by multimodal tomography
A two-stage study of steel corrosion and internal cracking revealed by multimodal tomography Open
Modeling of corrosion-induced cracking is limited by lacking knowledge on the behavior of corrosion products. In this work, the corrosion and cracking processes were experimentally investigated in 3D at two different stages. The processes …
View article: Analysis of the flexural response of hybrid reinforced concrete beams with localized reinforcement corrosion
Analysis of the flexural response of hybrid reinforced concrete beams with localized reinforcement corrosion Open
This paper presents a modeling approach to analyze the flexural response of hybrid reinforced concrete beams with localized corrosion. A new mechanical model based on extensive uniaxial testing is proposed to describe the stress–strain rel…
View article: Concluding destructive investigation of a nine-year-old marine-exposed cracked concrete panel
Concluding destructive investigation of a nine-year-old marine-exposed cracked concrete panel Open
This study undertaken on a nine-year-old cracked concrete panel further investigates the impact of cracks on the corrosion performance of conventional steel reinforcement in marine-exposed concrete to explain observed monitoring data. The …
View article: Impact of cracks on distribution of chloride-induced reinforcement corrosion
Impact of cracks on distribution of chloride-induced reinforcement corrosion Open
Surface crack width is regulated in codes to limit corrosion of reinforcement bars in concrete. However, the influence of surface crack width on corrosion damages is not directly inferable from previous research.In this work, data on corro…
View article: Experiments and calibration of a bond-slip relation and efficiency factors for textile reinforcement in concrete
Experiments and calibration of a bond-slip relation and efficiency factors for textile reinforcement in concrete Open
Textile reinforcement yarns consist of many filaments, which can slip relative each other. At modelling of the global structural behaviour, interfilament slip in the yarns, and slip between the yarns and the concrete can be considered by e…
View article: Finite element analyses of FRP-strengthened concrete beams with corroded reinforcement
Finite element analyses of FRP-strengthened concrete beams with corroded reinforcement Open
Existing deteriorated reinforced concrete (RC) structures need strengthening to extend service life. Fibre reinforced polymer (FRP) has been widely used to strengthen sound structures, but its application on damaged concrete structures sti…
View article: Optimisation of slab track design considering dynamic train–track interaction and environmental impact
Optimisation of slab track design considering dynamic train–track interaction and environmental impact Open
Modern railway tracks for high-speed traffic are often built based on a slab track design. A major disadvantage of slab track compared to conventional ballasted track is that the environmental impact of the construction is higher due to th…
View article: Comparison of the service life, life-cycle costs and assessment of hybrid and traditional reinforced concrete through a case study of bridge edge beams in Sweden
Comparison of the service life, life-cycle costs and assessment of hybrid and traditional reinforced concrete through a case study of bridge edge beams in Sweden Open
The edge beams of reinforced concrete bridges with de-icing salts sprayed experience extensive corrosion damage. The average service life of edge beams needing replacement in Sweden has been reported as only 45 years, causing great economi…
View article: Numerical assessment of bond-slip relationships for naturally corroded plain reinforcement bars in concrete beams
Numerical assessment of bond-slip relationships for naturally corroded plain reinforcement bars in concrete beams Open
Reinforced Concrete (RC) heritage structures are often affected by corrosion. Consequently, knowledge about the effect of corrosion on the bond between reinforcing bars and surrounding concrete is critical when assessing the structural per…
View article: A closer look at corrosion of steel reinforcement bars in concrete using 3D neutron and X-ray computed tomography
A closer look at corrosion of steel reinforcement bars in concrete using 3D neutron and X-ray computed tomography Open
Corrosion of reinforcing bars constitutes the largest threat to the durability of concrete structures. Thus, several studies have investigated the nature of the corrosion products, most using post-mortem analyses. However, corrosion produc…
View article: Ballastless Track – Minimizing the Climate Impact
Ballastless Track – Minimizing the Climate Impact Open
Railway transportation is becoming increasingly important for transport of passengers and goods in Sweden, Europe and many parts of the world. Ballastless (slab) railway systems are increasingly in use; however, their construction is known…
View article: Modeling and computational homogenization of chloride diffusion in three-phase meso-scale concrete
Modeling and computational homogenization of chloride diffusion in three-phase meso-scale concrete Open
A computational homogenization technique for modeling diffusion in concrete is introduced with emphasis on the influence of the aggregate content and variability. The highly heterogeneous material is investigated on different scales by com…
View article: Incorporation of pre-existing cracks in finite element analyses of reinforced concrete beams without transverse reinforcement
Incorporation of pre-existing cracks in finite element analyses of reinforced concrete beams without transverse reinforcement Open
Cracking in reinforced concrete (RC) bridges and other structures is common and not necessarily detrimental. However, some cracks may grow past specified limits and, aside from aesthetic and durability aspects, may influence the ductility …
View article: Upscaling of three-dimensional reinforced concrete representative volume elements to effective beam and plate models
Upscaling of three-dimensional reinforced concrete representative volume elements to effective beam and plate models Open
Two-scale models for reinforced concrete, where the large-scale problems are defined in terms of Euler–Bernoulli beam and Kirchhoff–Love plate models, are constructed. The subscale problem on the Representative Volume Element (RVE) is corr…
View article: Incorporation of pre-existing longitudinal cracks in finite element analyses of corroded reinforced concrete beams failing in anchorage
Incorporation of pre-existing longitudinal cracks in finite element analyses of corroded reinforced concrete beams failing in anchorage Open
Transportation infrastructure is of fundamental importance and must be regularly assessed to ensure its safety and serviceability. The assessment of ageing reinforced concrete bridge stock may need to consider corrosion and cracks, as the …
View article: Assessment of the mechanical behaviour of reinforcement bars with localised pitting corrosion by Digital Image Correlation
Assessment of the mechanical behaviour of reinforcement bars with localised pitting corrosion by Digital Image Correlation Open
Corrosion of reinforcement in concrete impairs the mechanical behaviour of rebars by decreasing their strength and deformation capacity. In this study, uniaxial tensile tests were carried out on 61 rebars taken from 22 pre- and un- cracked…
View article: Bond of naturally corroded, plain reinforcing bars in concrete
Bond of naturally corroded, plain reinforcing bars in concrete Open
In the past, reinforced concrete structures were built utilising plain reinforcement bars. Currently, this construction method is seldom considered by codes and research; however, many heritage structures are still standing and in need of …