Essays about: "Ballasted track"

Showing result 1 - 5 of 20 essays containing the words Ballasted track.

1. 1. Analysis of combined response of railway bridge and track : A parametric finite element model of the bridge across Bryngeån

   University essay from KTH/Bro- och stålbyggnad

   Author : Moa Nolinder; [2023]
   Keywords : ;

   Abstract : When designing a railway bridge it is common to consider and designthe bridge structure and the track structure separately. However, theyare connected and that interaction generates a combined response and aforce transfer between them. READ MORE

3. 2. Numerical modelling of high-speed railway transition zone

   University essay from KTH/Jord- och bergmekanik

   Author : Karl Norberg; [2022]
   Keywords : Railway geotechnics; Bridge; Ballastless track; Transition zone; High-speed railway; Finite element method; Track stiffness;

   Abstract : Transition zones are changes in the track structure, detected by an abrupt deviationin track stiffness and/or differential settlements. One inevitable transition zone is thebridge approach. This study has investigated in this transition zone, adapted for highspeed,ballastless track. READ MORE

4. 3. Reliability-Based Sensitivity Analysis of the Dynamic Response of Railway Bridges

   University essay from KTH/Bro- och stålbyggnad

   Author : Hasan Al-Zubaidi; [2022]
   Keywords : Railway bridges; High-speed trains; Simply supported beam; Global sensitivity analysis; Uncertainty quantification; Reliability; Ballast instability; Running safety; Passenger comfort;

   Abstract : In response to the planned increase in operational speeds and axle loads of passengertrains that may lead to resonance-induced excessive vibrations in railway bridges,recent studies examined the reliability of bridges concerning train running safety andpassenger comfort limit states. In this respect, valuable information regarding theimportance of input variables can be obtained by conducting Sensitivity Analysis (SA). READ MORE

5. 4. Parametric Studies of Train-Track-Bridge Interaction : An evaluation of the dynamic amplification due to track irregularities for freight transport

   University essay from KTH/Bro- och stålbyggnad

   Author : Rasmus Elm Dahlman; Emil Lundberg; [2021]
   Keywords : Dynamics; dynamic amplification factor; railway bridge; train-track-bridge interaction; vehicle model; track irregularities; PSD; Dynamisk förstoringsfaktor; dynamik; järnvägsbroar; tåg-spår-bro interaktion; fordonsmodell; spårojämnheter; PSD;

   Abstract : In this thesis a train-track-bridge interaction (TTBI) model is developed in order to study the dynamic amplification from track irregularities on railway bridges traversed by freight trains. These simulations are of great importance since rail freight transport is expected to increase in order to meet the climate goals. READ MORE

6. 5. Simulation of railway infrastructure with asphalt layer for tracks in Sweden

   University essay from KTH/Byggvetenskap

   Author : Aleksandra Kuksova; [2020]
   Keywords : Ballasted track; bituminous mixture; bituminous sub-ballast; temperature; railway track modelling; finite element analysis. v;

   Abstract : With the introduction of high-speed trains over the past few years, as well as withan increase in traffic loads and volumes, the attractiveness and competitiveness ofthe railway transport system have increased. This leads to the need to develop newcost-effective ways in railway construction, providing an increase in the life cycle ofthe railway track and reducing the need for maintenance. READ MORE