Load Train
Mostrando 1-12 de 19 artigos, teses e dissertações.
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1. Dynamic Response Analysis of Geogrid Reinforced Embankment Supported by CFG Pile Structure During a High-Speed Train Operation
Abstract The performance of railroad structure has a tremendous influence on the safety and stable operation of high-speed trains. Strong vibrations and the degradation rate of the track are the main factors affecting the transport safety of a railroad built over a weak soil. Geogrid reinforced embankment supported by pile structure is a new efficient constr
Lat. Am. j. solids struct.. Publicado em: 15/08/2019
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2. Investigating the Influence of Auxiliary Rails on Dynamic Behavior of Railway Transition Zone by a 3D Train-Track Interaction Model
Abstract Abrupt track vertical stiffness variations along railway tracks can lead to increased dynamic loads, asymmetric deformations, damaged track components, and consequently, increased maintenance costs. The junction of slab track and ballasted track is one of the existing areas where vertical track stiffness can suddenly change, therefore requiring a tr
Lat. Am. j. solids struct.. Publicado em: 2017
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3. Modelling the Hot Flow Behaviors of AZ80 Alloy by BP-ANN and the Applications in Accuracy Improvement of Computations
Hot compressions of as-cast AZ80 magnesium alloy in a wide temperature range of 523-673 K and strain rate range of 0.01-10 s–1 with a height reduction of 60% were conducted by a Gleeble-1500 thermo-mechanical test simulator. The hot flow behaviors show highly non-linear intrinsic relationships with temperature, strain and strain rate. In order to model the
Mat. Res.. Publicado em: 03/11/2015
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4. Explicit expression for effective moment of inertia of RC beams
AbstractDeflection is an important design parameter for structures subjected to service load. This paper provides an explicit expression for effective moment of inertia considering cracking, for uniformly distributed loaded reinforced concrete (RC) beams. The proposed explicit expression can be used for rapid prediction of short-term deflection at service lo
Lat. Am. j. solids struct.. Publicado em: 2015-03
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5. Stress-based fatigue reliability analysis ofthe rail fastening spring clipunder traffic loads
Nowadays, the rail fastening systems play an important role for preserving the connection between the rails and sleepers in various conditions. In this paper, stress based concept is used to develop a comprehensive approach for fatigue reliability analysisof fastening spring clip. Axle load, speed and material properties are assumed to be random variables. F
Lat. Am. j. solids struct.. Publicado em: 2014-11
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6. Sensitivity analysis of bridge-track-train system to parameters of railway
Generally, Railway bridges are long structures which have different responses against different loads of train. Applied loads of train on railroad bridges are different in terms of axle loads speed, and annual passed tonnages and they have quite different dynamic behavior in comparison with road bridges. Most researches are basically focused on the quasi-sta
Lat. Am. j. solids struct.. Publicado em: 2014-08
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7. SOLUÇÕES DE OTIMIZAÇÃO DA EFICIÊNCIA ENERGÉTICA DE UMA FERROVIA DE CARGA: O CASO DA ESTRADA DE FERRO CARAJÁS / SOLUTIONS OF OPTIMIZATION OF THE ENERGY EFFICIENCY OF A RAILROAD OF LOAD: THE CASE OF ESTRADA DE FERRO CARAJÁS
The energy efficiency represents the oil consumption diesel of the locomotives multiplied by the load carried and the distance from one determined stretch. This is a subject little searched in the practical railroad, however is a subject of extreme importance. To improve the energy efficiency, actions can be taken in some levels: operational, technological,
Publicado em: 2009
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8. Railroad simulation on closed loop and its applications in Brazil evaluation of alternatives on choosing train destination. / Simulação em ciclo fechado de malhas ferroviárias e suas aplicações no Brasil: avaliação de alternativas para o direcionamento de composições.
The rail network simulation models considering trains on closed loop may have many disturbances. These disturbances are caused by the railnet traffic, or queues at the load/unload stations, that changes the movement previously planned. The validation of these simulation models can be problematic because of these disturbances, and the search for the right val
Publicado em: 2008
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9. Pobreza invisibilizada e resistÃncia: as favelas Ãs margens de trilhos em Fortaleza âCE e a polÃtica de urbanizaÃÃo de Ãreas de risco
This dissertation comes to discuss the reality of the slums along side of rails of the city of Fortaleza, specifically the communities of Boba (FÃtima Block) e Maravilha (Aeroporto Block) since 1985 to 2001. It discusses the meaning of âareas of riskâ today hold the political of interventions in slums that before of the decade of 80, unless were registere
Publicado em: 2007
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10. A DYNAMIC INTERACTION MODEL OF TRACK RAILWAY STRUCTURAL ELEMENTS / UM MODELO DE INTERAÇÃO DINÂMICA ENTRE OS ELEMENTOS ESTRUTURAIS DE UMA VIA FÉRREA
In a railway, the vehicle interacts dynamically with a track superstructure (rails, rail pad and sleepers) and sub-structure (ballast, sub-ballast, sub- grade). Passengers comfort, environmental loading (ground vibration) and frequency of maintenance works of vehicles as well as of the track are deter- mined by the way all the structural elements interact. T
Publicado em: 2006
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11. RESIDÊNCIA MÉDICA EM MEDICINA DE FAMÍLIA E COMUNIDADE: Um compromisso com a consolidação do SUS.
Family and community medicine and the Sistema Único de Saude (the Brazilian Public Health System) have gone hand-in-hand from their very beginning. It was within the departments of Preventive and Social medicine, and medical internships in General and Community Medicine, that ideas on the need for a change of health model in the country first emerged, as th
Publicado em: 2006
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12. Constant load creep data in air and vacuum on 2.25Cr-1Mo steel from 600 °C to 700 °C
Creep results on 2.25Cr-1Mo were obtained at 600 °C, 650 °C and 700 °C at five stress levels, under constant load, in air and vacuum. Two chambers were specially developed for carrying out creep testing in controlled environment, with the possibility of accommodating inside them the load train, the extensometry system and the thermocouples. The creep mach
Materials Research. Publicado em: 2005-12