Sökning: "Järnvägsgruppen - Infrastruktur"

Visar resultat 1 - 5 av 10 avhandlingar innehållade orden Järnvägsgruppen - Infrastruktur.

1. 1. Correlation between Track Irregularities and Vehicle Dynamic Response Based on Measurements and Simulations

   Författare :Tomas Karis; Mats Berg; Jens Nielsen; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; track irregularities; vehicle response; wheel–rail force; axle box acceleration; Dynotrain; Gröna Tåget; multi-body system; simulations; spårlägesfel; fordonsrespons; hjul–räl-krafter; axelboxacceleration; Dynotrain; Gröna Tåget; flerkroppssystem system; simuleringar; Järnvägsgruppen - Fordonsteknik; Järnvägsgruppen - Fordonsteknik; Vehicle and Maritime Engineering; Farkostteknik; Järnvägsgruppen - Infrastruktur; Järnvägsgruppen - Infrastruktur;

   Sammanfattning : Deviations from the design track geometry are called track irregularities, which are a main excitation mechanism in the track–vehicle dynamic system, and very important to monitor and maintain to have trac on a line run safely and comfortably. Especially during vehicle acceptance testing, it is important that a new vehicle behaves close to design predictions and within limit values, thus it is important to be able to describe track irregularities in a consistent way. LÄS MER

3. 2. Towards Sustainable Construction: Life Cycle Assessment of Railway Bridges

   Författare :Guangli Du; Raid Karoumi; Håkan Sundquist; Helge Brattebo; KTH; []
   Nyckelord :Life cycle assessment; LCA; Environment; Railway Bridge; Sustainability; Järnvägsgruppen - Infrastruktur; Järnvägsgruppen - Infrastruktur;

   Sammanfattning : Since last few decades, the increased pressure from the environmental issues of natural resource depletion, global warming and air pollution have posed a great challenge worldwide. Among all the industrial fields, bridge infrastructures and their belonged construction sector contribute to a wide range of energy and raw materials consumptions, which is responsible for the most significant pollutions. LÄS MER

4. 3. Lessons Learned in Structural Health Monitoring of Bridges Using Advanced Sensor Technology

   Författare :Merit Enckell; Johan Silfwerbrand; Konrad Bergmeister; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Structural Health Monitoring; Structural Health Monitoring System; bridges; sensor technology; emerging technology; fibre optics; fibre optic sensors concrete; creep; shrinkage; steel; distributed sensors; crack detection; Järnvägsgruppen - Infrastruktur; Järnvägsgruppen - Infrastruktur;

   Sammanfattning : Structural Health Monitoring (SHM) with emerging technologies like e.g. fibre optic sensors, lasers, radars, acoustic emission and Micro Electro Mechanical Systems (MEMS) made an entrance into the civil engineering field in last decades. Expansion of new technologies together with development in data communication benefited for rapid development. LÄS MER

5. 4. Road structures under climate and land use change : Bridging the gap between science and application

   Författare :Zahra Kalantari; Folkeson Lennart; Nachtnebel Hans-Peter; KTH; []
   Nyckelord :Adaptation; extreme rainfall events; runoff; land use; climate change; flood hazard; SRA - Transport; SRA - Transport; Järnvägsgruppen - Infrastruktur; Järnvägsgruppen - Infrastruktur;

   Sammanfattning : Future changes in climate and land use are likely to affect catchment hydrological responses and consequently influence the amount of runoff reaching roads. Blockages and damage to under-dimensioned infrastructure can be extremely costly for the regions affected. LÄS MER

7. 5. HOUSING THE URBAN POOR: AN INTEGRATED GOVERNANCE PERSPECTIVE : The Case of Dhaka, Bangladesh

   Författare :Kh. Md. Nahiduzzaman; Göran Cars; Tigran Haas; Alfredo Brillembourg; KTH; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Housing affordability; tenure security; social business; partnership; deliberative dialogue; cooperative business; informality; Järnvägsgruppen - Infrastruktur; Järnvägsgruppen - Infrastruktur;

   Sammanfattning : It is claimed that low-income people in Dhaka city do not have the financial ability to enjoy adecent housing environment. There is a clear lack of knowledge on how low-income people,drawing upon both their available income together and support from formal financial institutions,would be able to afford housing. LÄS MER