Sökning: "Superstructure"
Visar resultat 26 - 30 av 37 avhandlingar innehållade ordet Superstructure.
26. Evaluation of in-situ measurements of composite bridge with integral abutments
Sammanfattning : Bridges are an important element of the infrastructure today. The technical competence has reached high levels in most countries and the limits given to a bridge designer are set by economic restrictions rather than technical skill. LÄS MER
27. Development of life cycle cost model and analyses for railway switches and crossings
Sammanfattning : Infrastructure managers need to have a safe and available infrastructure, so that train operators can deliver a transport product at an affordable price. In the future, as traffic volume increases, higher utilisation of the existing capacity, less time for maintenance and fewer unplanned interruptions will be critical for meeting the ever increasing need of transport capacity. LÄS MER
28. Vibration mitigation of high-speed railway bridges : Application of damping devices in theory and practice
Sammanfattning : The dynamic response of railway bridges is an important aspect to consider, as the repetitive loading from passing trains may result in excessive vibrations of the bridge deck. Several design criteria are developed in order to assure the structural safety and passenger comfort during train crossings of a bridge. LÄS MER
29. Optimisation of Railway Switches and Crossings
Sammanfattning : Methods for simulation-based optimisation of the design of railway turnouts (switches & crossings, S&C) are developed and demonstrated. Building on knowledge of dynamic wheel–rail interaction in turnouts, it is investigated how rail profile degradation can be reduced by the optimisation of geometry and component stiffness of the track superstructure. LÄS MER
30. Från grav till gård : romersk järnålder på Gotland
Sammanfattning : Houses with a stone foundation represent a new type of building on Gotland in the middle of the Roman Iron Age. At the same time there are other changes, for instance the number of visible graves decreases, and the farm and its land are emphasized by the stone enclosures that meander in the landscape. LÄS MER