Essays about: "ballast modelling"

Showing result 1 - 5 of 9 essays containing the words ballast modelling.

1. 1. Evaluation of load distribution on ballasted reinforced concrete railway trough bridges

   University essay from Luleå tekniska universitet/Byggkonstruktion och brand

   Author : Alex Eriksson; [2023]
   Keywords : Concrete; numerical analysis; trough bridge; railway bridge; finite element model; discrete element method; Betong; numeriskanalys; trågbro; tågbro; finita elementmetoden; diskreta elementmetoden;

   Abstract : A significant portion of the reinforced concrete railway bridges in Sweden are reaching their designed lifespan and are scheduled to be demolished and replaced in the upcoming years. To limit the econom-icand environmental impact related to the replacement of existing railway infrastructure, a comprehen-siveevaluation of their capacity is required with the aim of extending its lifespan. READ MORE

3. 2. 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

4. 3. Investigation of impact sound behaviour in light weight floor constructions - A market survey and finite element analysis

   University essay from Lunds universitet/Teknisk akustik; Lunds universitet/Institutionen för byggvetenskaper

   Author : Fanny Sandberg; [2016]
   Keywords : intermediate floor; acoustics; impact sound; höga trähus; bjälklag; akustik; Stegljud; Ljud; wood; wooden high rise building; Technology and Engineering;

   Abstract : In the last years, the interest in high-rise timber framed building has gone up resulting in an increased demand for good solutions regarding sound insulation. Due to the worldwide growing interest in environmental issues, it has become of greater importance for companies to find ways to take care of their residue, instead of throwing it away. READ MORE

5. 4. Habitat preference of Neogobius Melanostomus in the Baltic Sea : habitat modelling of an invasive species

   University essay from SLU/Dept. Of Aquatic Resources

   Author : Sofia Willebrand; [2015]
   Keywords : Neogobius melanostomus; habitat preference; GAM-modelling; invasive;

   Abstract : Round goby, neogobius melanosotmus, is an invasive fish that has spread to the Baltic Sea from the Black sea. The invasion is most likely an effect of transport with ballast water. So far little is known of the impact of round goby in the invaded area, but changes in the food web structure have been observed in the Baltic Sea. READ MORE

6. 5. Influence of the ballast on the dynamic properties of a truss railway bridge

   University essay from KTH/Bro- och stålbyggnad

   Author : Lucie Bornet; [2013]
   Keywords : Ballast; Railway bridges; Experimental dynamics; Finite element modelling; Natural frequencies; Eigenmodes; Bridge stiffness.;

   Abstract : To deal with a rapid development of high-speed trains and high-speed railways, constant improvement of the railway infrastructure is necessary and engineers are continuously facing challenges in order to design efficient and optimized structures. Nowadays, more and more railway bridges are built and thus, they require the engineers’ attention both regarding their design and their maintenance. READ MORE