Blar i NTNU Open på forfatter "Rønnquist, Anders"
-
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-Span Brettstapel Roof Structures: A Parametric Design Approach
Kampenes, Camilla By (Master thesis, 2021)Bakgrunn: Tre har økt i popularitet som et konstruksjonsmateriale de siste årene, på grunn av et økt fokus på klimaendringer og materialets status som miljøvennlig. I en tid hvor digitalisering gjennomsyrer byggebransjen ... -
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 and experimental studies for damage detection and structural health monitoring of steel bridges
Svendsen, Bjørn T. (Doctoral theses at NTNU;2021:382, Doctoral thesis, 2021)There is a vast number of existing bridges in infrastructure that are approaching or have exceeded their original design lives. A large part of these bridges are steel and composite steel-concrete bridges. The primary ... -
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 ... -
On the use of experimental modal analysis for system identification of a railway pantograph
Nåvik, Petter Juell; Derosa, Stefano; Rønnquist, Anders (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 ... -
One algorithm, two timber bridges built in Orkdal, Norway
Mork, John Haddal; Luczkowski, Marcin; Dyvik, Steinar Hillersøy; Manum, Bendik; Rønnquist, Anders (Chapter, 2017)The building industry is about to embrace mass customization. In recent years, iconic buildings have demanded a new way of approaching design and manufacturing. We, among others, believe that parametrization is key to fully ... -
Operational Displacement Estimations of Railway Catenary Systems by Photogrammetry and the Integration of Acceleration Time Series
Frøseth, Gunnstein Thomas; Nåvik, Petter Juell; Rønnquist, Anders (Journal article, 2020) -
Operational modal analysis of an end-supported pontoon bridge
Kvåle, Knut Andreas; Rønnquist, Anders; Øiseth, Ole (Journal article; Peer reviewed, 2017)A comprehensive monitoring system is installed and currently in operation on the Bergsøysund Bridge, an end-supported floating pontoon bridge, collecting data on accelerations, displacements, waves, and wind. Using ... -
Optimalisering av fagverksbuer for store frispennkonstruksjoner
Henriksen, Marius Kristoffer; Johansen, Jørgen Tønsberg (Master thesis, 2020)Store frispennskonstruksjoner på over 100 meter er ikke noe standardprosjekt det finnes mange av. Hallmaker ønsker derfor at oppgaven skal studere hvordan slike konstruksjoner kan utføres på en mest mulig gunstig måte ved ... -
Optimalisering av fagverksbuer for store frispennkonstruksjoner
Henriksen, Marius Kristoffer; Johansen, Jørgen Tønsberg (Master thesis, 2020)Store frispennskonstruksjoner på over 100 meter er ikke noe standardprosjekt det finnes mange av. Hallmaker ønsker derfor at oppgaven skal studere hvordan slike konstruksjoner kan utføres på en mest mulig gunstig måte ved ... -
Optimization and Digital Fabrication of Material Effective Concrete Slabs
Borgen, Kristine Strøm; Hjelmeland, Mia Skauge (Master thesis, 2021) -
Optimization of Shell Structures
Al-Sabbagh, Ahmad (Master thesis, 2022)Skallkonstruksjoner er relativt populært blant folk, men samtidig veldig komplisert å beregne og prosjektere. Dette krever mye tid til å nå et godt skall som kan tilfredsstille arkitektene. Dette er selvsagt ikke en rett ... -
Parametric excitation of mooring systems
Cantero, Daniel; Rønnquist, Anders (Research report, 2018) -
Parametric Study of Bridge Concepts and Cable Net
Nøkland, Sone August (Master thesis, 2020)Dette masterprosjektet er en forstudie for konstruksjon av ny gangbro over kanalen mellom Tønsberg brygge og Kaldnes, i Vestfold og Telemark fylke. Prosjektet har en ingeniørfaglig inngang, og består av en konseptstudie ... -
Railway catenary tension force monitoring via the analysis of wave propagation in cables
Derosa, Stefano; Nåvik, Petter Juell; Collina, Andrea; Rønnquist, Anders (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 ... -
A robust line-tracking photogrammetry method for uplift measurements of railway catenary systems in noisy backgrounds
Jiang, Tengjiao; Frøseth, Gunnstein Thomas; Rønnquist, Anders; Fagerholt, Egil (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 ... -
Systematic Metadata Analysis of Wind-Exposed Long-Span Bridges for Road Vehicle Safety Assessments
Reymert, Sebastian; Rønnquist, Anders; Øiseth, Ole Andre (Journal article; Peer reviewed, 2022) -
Tension during parametric excitation in submerged vertical taut tethers
Cantero, Daniel; Rønnquist, Anders; Næss, Arvid (Journal article; Peer reviewed, 2017)The construction of a suspension bridge with floating pylons or a submerged floating tunnel requires the installation of a mooring system. The option of taut vertical tethers, similar to those used in tension-leg platforms, ...