Search for dissertations about: "Bro- och stålbyggnad"

Showing result 21 - 25 of 84 swedish dissertations containing the words Bro- och stålbyggnad.

  2. 21. Reliability-Based Assessment and Optimization of High-Speed Railway Bridges

    Author : Reza Allahvirdizadeh; Raid Karoumi; Andréas Andersson; Daniel Straub; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; High-speed railway bridges; Bridge dynamics; Running safety; Passenger comfort; Structural reliability; Meta-models; Surrogate models; Adaptive sampling; Reliability-based design optimization; Höghastighetsjärnvägsbroar; Brodynamik; Trafiksäkerhet; Passagerarkomfort; Konstruktioners tillförlitlighet; Metamodeller; Surrogatmodeller; Adaptiv sampling; Tillförlitlighetsbaserad designoptimering; Structural Engineering and Bridges; Bro- och stålbyggnad;

    Abstract : Increasing the operational speed of trains has attracted a lot of interest in the last decades and has brought new challenges, especially in terms of infrastructure design methodology, as it may induce excessive vibrations. Such demands can damage bridges, which in turn increases maintenance costs, endangers the safety of passing trains and disrupts passenger comfort. READ MORE

  4. 22. Reliability-based fatigue assessment of existing steel bridges

    Author : Ruoqi Wang; John Leander; Raid Karoumi; John Dalsgaard Sørensen; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Fatigue; steel bridges; reliability analysis; spatial correlation; risk analysis; Monte Carlo simulation; Utmattning; stålbroar; tillförlitlighet; rumslig korrelation; riskanalys; Monte Carlo-simulering; Structural Engineering and Bridges; Bro- och stålbyggnad;

    Abstract : Fatigue is among the most critical forms of deterioration damage that occurs tosteel bridges. It causes a decline of the safety level of bridges over time. Therefore,the performance of steel bridges, which may be seriously affected by fatigue, shouldbe assessed and predicted. READ MORE

  5. 23. Towards a sustainable road infrastructure in an age of digitization: opportunities and challenges

    Author : Zhuhuan Liu; Nicole Kringos; Romain Balieu; Aikaterini (Katerina) Varveri; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Sustainable infrastructure; Pavement Maintenance; Optimization; Neutron tomography; Self-healing; Hållbar infrastruktur; Vägunderhåll; Optimering; Neutronavbildning; Självläkning; Structural Engineering and Bridges; Bro- och stålbyggnad;

    Abstract : Pavement system plays an indispensable role in the socio-economic and sustainable development of every modern society. Yet, pavement construction and maintenance is also responsible for a significant fraction of the GHG emissions from the whole transport sector. READ MORE

  6. 24. Investigation on the self-healing capabilties of asphaltic materials using neutron imaging

    Author : Adrian Markari; Nicole Kringos; Anders Kaestner; Romain Balieu; Lily Poulikakos; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Self-healing; bituminous materials; neutron imaging; sample size effect; reconstruction; image processing; volumetric analysis; Structural Engineering and Bridges; Bro- och stålbyggnad;

    Abstract : Bitumen acts as a binding agent in asphalt mixtures where it binds the aggregates together. It is known for its potential to heal small cracks and recover its mechanical properties under the right conditions. Though this self-healing property is known, there is currently a lack of knowledge about the mechanisms that drive the process. READ MORE

  7. 25. Bridge Overhang Slabs with Edge Beams : LCCA and Structural Analysis for the Development of New Concepts

    Author : José Javier Veganzones Muñoz; Costin Pacoste; Raid Karoumi; Lars Pettersson; Rui Vaz Rodrigues; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Overhang slab; Edge beam; Life-cycle Cost Analysis; Non-linear FE-analysis; Design methods; Shear force; Failure mode; Effective width; Minimal width.; Konsolplattor; Kantbalkar; Livscykelkostnadsanalys; Icke-linjär FE-analys; Dimensioneringsmetoder; Tvärkrafter; Brott; Fördelningsbredd; Minimal bredd.; Bro- och stålbyggnad; Structural Engineering and Bridges;

    Abstract : Bridge edge beams are associated with high life-cycle costs because of the need of maintenance, which also causes traffic disturbances. For this reason, the Swedish Transport Administration started a project to find better solutions. One of the proposals was a design without edge beam. READ MORE