Browsing NTNU Open by Author "Rønnquist, Anders"
Now showing items 1-20 of 33
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An enhanced forced vibration rig for wind tunnel testing of bridge deck section models in arbitrary motion
Siedziako, Bartosz; Øiseth, Ole; Rønnquist, Anders (Journal article, 2017)This paper presents a new experimental setup for the aerodynamic section model testing of bridge decks. The rig is designed to move a section model in arbitrary motion in a wind tunnel to imitate the motions of such scaled ... -
Assessment of the High-frequency Response in Railway Pantograph-Catenary Interaction Based on Numerical Simulation
Song, Yang; Rønnquist, Anders; Nåvik, Petter Juell (Peer reviewed; Journal article, 2020)The numerical model is a well-acknowledged tool to evaluate railway pantograph-catenary interaction performance. The current standard restricts most current simulation tools by a cut-off frequency of 20 Hz. This low-frequency ... -
Conceptual form-finding in structural engineering
Luczkowski, Marcin (Doctoral theses at NTNU;2020:232, Doctoral thesis, 2020)The building industry is a growing industry, and it is expected to be expanding further in the near future. In the design, production and construction of new projects, the conceptual design is clearly the most creative ... -
Contact Wire Irregularity Stochastics and Effect on High-speed Railway Pantograph-Catenary Interactions
Song, Yang; Liu, Zhigang; Rønnquist, Anders; Nåvik, Petter Juell; Liu, Zhendong (Peer reviewed; Journal article, 2020)In high-speed rail operations, contact wire irregularity (CWI) in a catenary is a common disturbance to the pantograph-catenary interaction performance, which directly affects the quality of current collection. To describe ... -
Covariance-driven stochastic subspace identification of an end-supported pontoon bridge under varying environmental conditions
Kvåle, Knut Andreas; Øiseth, Ole; Rønnquist, Anders (Journal article, 2017)The Bergsøysund Bridge is currently being extensively monitored with accelerometers, anemometers, wave radars and GNSS sensors. By applying Covariance-driven Stochastic Subspace Identification (Cov-SSI), the modal parameters ... -
Damage Detection Applied to a Full-Scale Steel Bridge Using Temporal Momens
Svendsen, Bjørn Thomas; Frøseth, Gunnstein Thomas; Rønnquist, Anders (Peer reviewed; Journal article, 2020)The most common damages in existing highway and railway steel bridges are related to fatigue and are, as reported in the literature, found in the structural system of the bridge deck. This paper proposes a methodology for ... -
Damping in Timber Structures
Labonnote, Nathalie (Doctoral Theses at NTNU, 1503-8181; 2012:263, Doctoral thesis, 2012)Key point to development of environmentally friendly timber structures, appropriate to urban ways of living, is the development of high-rise timber buildings. Comfort properties are nowadays one of the main limitations to ... -
Development of an index for quantification of structural dynamic response in a railway catenary section
Nåvik, Petter Juell; Derosa, Stefano; Rønnquist, Anders (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. ... -
Dynamic behaviour of existing and new railway catenary systems under Norwegian conditions
Nåvik, Petter Røe (Doctoral theses at NTNU;2016:298, Doctoral thesis, 2016)This thesis concerns the dynamic behaviour of railway catenary systems, particularly Norwegian systems. The aim of this PhD study is to increase the knowledge of the dynamic behaviour of these systems. This includes analyses ... -
Dynamic comparison of a railway catenary section upgrade by field measurement assessments
Nåvik, Petter Røe; Rønnquist, Anders (Journal article; Peer reviewed, 2017)The pantograph-catenary interaction is crucial for running trains on electrical railway lines. The coupled dynamic problem of an in space stationary system, the catenary system, and a system in motion, the pantograph, is ... -
Dynamic optimization of railway catenary system by turning unwanted lumped-mass into tuned-mass
zhendong, liu; Stichel, Sebastian; Rønnquist, Anders (Chapter, 2017)The railway catenary is suspended to its supports with droppers, clamps and oth-er fittings. These lumped-masses are made light and small to minimize disturbances. The mass-es cannot be completely removed but can be adjusted ... -
Evolution of load conditions in the Norwegian railway network and imprecision of historic railway load data
Frøseth, Gunnstein Thomas; Rønnquist, Anders (Journal article; Peer reviewed, 2018)This article describes historic load conditions in the Norwegian railway network to improve estimates of the remaining service life of bridges. Data on rolling stock, traffic and infrastructure throughout the history of ... -
Experiences from the five-year monitoring of a long-span pontoon bridge: What went right, what went wrong and what?s next?
Kvåle, Knut Andreas; Øiseth, Ole; Rønnquist, Anders (Journal article; Peer reviewed, 2019)The Bergsøysund Bridge is a 930-metre-long end-supported pontoon bridge located in Norway, and has been the target of a five-year-long, extensive monitoring program. Herein, we will describe the unique structural characteristics ... -
Global Buckling Reliability Analysis of Slender Network Arch Bridges: An Application of Monte Carlo-Based Estimation by Optimized Fitting
Rønnquist, Anders; Næss, Arvid (Chapter, 2017)Network arch bridges are extremely slender bridge structures with a very efficient 16 load-carrying structure. This configuration can carry loads that are several times greater 17 than traditional tied-arch bridges with ... -
A heuristic wear model for the contact strip and contact wire in pantograph – Catenary interaction for railway operations under 15 kV 16.67 Hz AC systems
Derosa, Stefano; Nåvik, Petter Juell; Collina, Andrea; Bucca, Giuseppe; Rønnquist, Anders (Peer reviewed; Journal article, 2020)The sliding contact between the pantograph and catenary allows the correct operation of electric trains. However, this contact induces wear on both the components involved in the process, namely the contact strip on the ... -
Indirect monitoring of vortex-induced vibration of suspension bridge hangers
Cantero, Daniel; Øiseth, Ole; Rønnquist, Anders (Journal article; Peer reviewed, 2017)Wind loading of large suspension bridges produces a variety of structural responses, including the vortex-induced vibrations of the hangers. Because it is impractical to monitor each hanger, this study explores the possibility ... -
Influence line extraction by deconvolution in the frequency domain
Frøseth, Gunnstein Thomas; Rønnquist, Anders; Cantero, Daniel; Øiseth, Ole (Journal article; Peer reviewed, 2017)This paper proposes a new method for extracting static influence lines from measurements on bridges. The response of a structure is the convolution of the load and the influence line. Previous research has not embraced the ... -
Long-term extreme buffeting response investigations for longspan bridges considering uncertain turbulence parameters based on field measurements
Lystad, Tor Martin (Doctoral theses at NTNU;2021:216, Doctoral thesis, 2021)When bridges become increasingly longer, the dynamic behavior from wind and waves can dominate the structural load effects. To build better knowledge about the dynamic behavior of long-span bridges subjected to turbulent ... -
Long-term monitoring of wind field characteristics and dynamic response of a long-span suspension bridge in complex terrain
Fenerci, Aksel; Øiseth, Ole; Rønnquist, Anders (Journal article; Peer reviewed, 2017)Long-term monitoring data of wind velocities and accelerations on the Hardanger Bridge are used to investigate the relationship between the wind-loading and response processes. The extensive measurement system consisting ... -
Numerical Evaluation of Modal Properties Change of Railway Bridges during Train Passage
Cantero, Daniel; Rønnquist, Anders (Journal article; Peer reviewed, 2017)During the passage of vehicles over a bridge, both systems (vehicle and bridge) are coupled together. This coupling is generally accounted for in vehicle-bridge interaction analyses. It is also commonly acknowledged that ...