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Railway catenary tension force monitoring via the analysis of wave propagation in cables
(Peer reviewed; Journal article, 2020)The tensioning forces applied to the contact wire in a railway catenary system influence the performance of the line. In this paper, a method to monitor the status of such tensioning forces is proposed based on the dependency ... -
Durability of pretensioned concrete girders in coastal climate bridges: Basis for better maintenance and future design
(Peer reviewed; Journal article, 2019) -
On the use of experimental modal analysis for system identification of a railway pantograph
(Peer reviewed; Journal article, 2020)This study investigates the use of experimental modal analysis to identify the modal properties of a railway pantograph system, including component behaviour within the system, for an extended frequency range in three main ... -
Fracture in wood of Norway spruce. Experimental and numerical study.
(Doctoral theses at NTNU;2020:314, Doctoral thesis, 2021)In this thesis, the fracture mechanical properties of wood from Norway spruce at the scale of the structural component were investigated. For that purpose, a detailed analysis of the displacement fields in the zone of the ... -
Melting cell based compensated design method for improving dimensional accuracy of additively manufactured thin channels
(Peer reviewed; Journal article, 2020)Powder-bed fusion additive manufacturing technology makes it possible to produce parts with complicated geometry and high accuracy. However, dimensional deviation caused by powder overmelting and dross formation is still ... -
Experimental Investigation on Glaze Ice Accretion and Its Influence on Aerodynamic Characteristics of Pipeline Suspension Bridges
(Peer reviewed; Journal article, 2020)Pipeline suspension bridges may experience ice accretion under special atmospheric conditions, and the aerodynamic characteristics of the bridges may be modified by the ice accretion. Under some specific climatic conditions ... -
Design of a monitoring system for a long-span suspension bridge: optimal sensor placement
(Chapter, 2020)The design of systems for structural health monitoring is an exercise that requires careful planning of optimal sensor locations. The number of possible locations usually outnumbers the number of available sensors, which ... -
Buffeting response of long-span bridges considering uncertain turbulence parameters using the environmental contour method
(Peer reviewed; Journal article, 2020)Full-scale monitoring of the Hardanger Bridge has revealed significant turbulence-induced variability in the measured acceleration response. In this paper, a probabilistic model is used to describe the uncertain turbulence ... -
Reconfigurable Mechanical Anisotropy in Self-Assembled Magnetic Superstructures
(Peer reviewed; Journal article, 2021)Enhancement of mechanical properties in self-assembled superstructures of magnetic nanoparticles is a new emerging aspect of their remarkable collective behavior. However, how magnetic interactions modulate mechanical ... -
Development of an index for quantification of structural dynamic response in a railway catenary section
(Peer reviewed; Journal article, 2020)In an attempt to quantify the amount of the dynamic reaction in a railway catenary system due to the dynamic action created by the interaction with the pantograph of the train, a catenary dynamic index (CDI) is developed. ... -
A robust line-tracking photogrammetry method for uplift measurements of railway catenary systems in noisy backgrounds
(Peer reviewed; Journal article, 2020)For electrical railways, contact wires are used to ensure stable and continuous power supply to trains operating on the infrastructure. One crucial design parameter used to control the catenary design is the vertical ... -
Alkali Aggregate Reactions (AAR) in Norway: Thin section analysis and expansion measurements from a dam and a bridge
(Peer reviewed; Journal article, 1992)Two concrete structures with AAR have been investigated. The structures are a dam and a bridge, both approximately 30 years old. Both structures have a characteristic crack pattern on the surface of the concrete. Thin ... -
Ductility and brittleness of lightweight aggregate concrete structures
(Doctoral theses at NTNU;2021:16, Doctoral thesis, 2021)Lightweight aggregate concrete (LWAC) has been used in construction since ancient Greek and Roman times, for more than two thousand years. With its low density, it was mainly used to reduce the weight of the structures. ... -
Determination of the pH and the free alkali metal content in the pore solution of concrete: Review and experimental comparison
(Journal article; Peer reviewed, 2017)The durability of concrete is affected by the pH of its pore solution, which is linked to the free alkali metal content. This paper starts with a literature review of methods for determining the pH and/or the free alkali ... -
Frost dilation measurements on concrete cores from a dam with ASR
(Chapter, 2008)In order to evaluate length change measurements to determine damage in concrete due to both ASR and internal frost attack, concrete cores drilled from a 25 year old dam with slight ASR and some surface frost damage were ... -
Structural Vulnerability Assessment of Heritage Timber Buildings: A Methodological Proposal
(Peer reviewed; Journal article, 2020)The conservation of heritage structures is pivotal not only due to their cultural or historical importance for nations, but also for understanding their construction techniques as a lesson that can be applied to contemporary ... -
Energy Absorption of Aluminium Extrusions Filled with Cellular Materials Under Axial Crushing: Study of the Interaction Effect
(Peer reviewed; Journal article, 2020)This investigation focuses on the interaction effect during the quasi-static axial crushing of circular and square thin-walled aluminium extrusions filled with polymeric foam or cork. The increment in the absorbed energy ... -
Nanoscale modelling of combined isotropic and kinematic hardening of 6000 series aluminium alloys
(Peer reviewed; Journal article, 2020)Kinematic hardening is incorporated into a nanoscale model for 6000 series aluminium alloys consisting of three sub-models describing in turn precipitation of hardening particles, yield strength and work hardening. The ... -
Experimental investigation of ASR-affected concrete – The influence of uniaxial loading on the evolution of mechanical properties, expansion and damage indices
(Peer reviewed; Journal article, 2020)The alkali silica reaction (ASR) in concrete causes internal localized swelling and micro cracking, which result in expansion and correlated deterioration of the concrete material. The stress state of the concrete is known ...
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