Subgrade
Mostrando 1-12 de 20 artigos, teses e dissertações.
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1. Study of soils used with subgrade and sub-ballast in Brazilian railways
Abstract Brazil has an extremely limited railroad network compared to other developed and developing countries. There are projects to expand this mesh. Knowing that the cost of implementing a railroad is high, research for solutions that allow cost reduction is of great importance. But the parameters of the materials used in the subgrade and sub-ballast laye
REM - International Engineering Journal. Publicado em: 2022
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2. Load equivalency factors for off-road trucks
Abstract This article addresses an analysis of the Load Equivalency Factor (LEF) for off-road trucks. A new LEF curve for single axles with dual wheels covering trucks from 6.0 to 151.42 tons per axle is proposed, converting various magnitudes of damage from wheel loads to damage caused by the standard axle load of 8.2 tons. Then, this damage ratio was raise
REM, Int. Eng. J.. Publicado em: 16/09/2019
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3. Behavioral Study of Finite Beam Resting on Elastic Foundation and Subjected to Travelling Distributed Masses
Abstract The classical problem of the response characteristics of uniform structural member resting on elastic subgrade and subjected to uniform partially distributed load is studied in this work. The closed form solutions of the governing fourth order partial differential equations with variable coefficients are presented using an elegant analytical techniq
Lat. Am. j. solids struct.. Publicado em: 2017-02
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4. Deflection profile analysis of beams on two-parameter elastic subgrade
A procedure involving spectral Galerkin and integral transformation methods has been developed and applied to treat the problem of the dynamic deflections of beam structure resting on bi-parametric elastic subgrade and subjected to travelling loads. The case of the response to moving constant loads of this slender member is first investigated and a closed fo
Lat. Am. j. solids struct.. Publicado em: 2013-03
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5. Avaliação do desempenho de pavimentos permeáveis / Experimental analysis of permeable pavements
This study aimed to evaluate the experimental performance of three types of permeable pavements constructed in three different structural conditions in order to control runoff in urbanized areas of the city of Goiania, Goias, adapting to the legal requirements and using local manufactured materials. It was evaluated nine experimental plots of 3.2 m as the fo
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/09/2011
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6. Fibras de aço em concreto de cimento Portland aplicados a pavimento / Portland cement concrete with steel fibers used in pavement
The objective of this research is to contribute for the Portland cement concrete study with addition of fibers used on pavements. This research studied the results of different dosages using steel fibers in order to optimize their use as well as direct care during mixing and application. The Portland cement concrete pavement has been acting with an important
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/08/2011
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7. UTILIZAÇÃO DO AGREGADO SIDERÚRGICO (ESCÓRIA DE ACIARIA) EM REVESTIMENTO ASFÁLTICO TIPO TRATAMENTO SUPERFICIAL / UTILIZAÇÃO DO AGREGADO SIDERÚRGICO (ESCÓRIA DE ACIARIA) EM REVESTIMENTO ASFÁLTICO TIPO TRATAMENTO SUPERFICIAL
Environmental sustainability requires preventive or mitigating environmental impacts caused by industrial production activities, to preserve non-renewable mineral resources. In this sense, this work is to evaluate through experimental studies predominantly by laboratory testing and field application the use of steel slag produced by Arcelor Mittal Tubarão i
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/04/2011
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8. Uso de materais não convencionais para base de pavimentos asfálticos no muunicípio de Aparecida de Goiânia - GO / The use of non-conventional materials for asphalt pavements base in the city of Aparecida de Goiânia-GO
The city of Aparecida de Goiania-GO has a current estimate of 16,782,313 m of urban roads, and there are still 51.5% to be paved. However, the technical staff of the mayor is facing a challenge related to the purchase of lateritic gravel for paving of these streets. Taking into account that most roads in the city has a low volume of traffic (N ≤ 5.105)
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/03/2011
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9. Respostas estruturais em pavimentos flexíveis via utilização de equações de módulos de resiliência de solos de subleito e da camada de reforço / Structural responses in flexible pavements using equations of modules resilience of soil subgrade and the reinforcement layer
Este trabalho teve por objetivo analisar o comportamento resiliente de três solos típicos da região de Viçosa-MG, quando supostamente empregados no subleito e na camada de reforço de um pavimento flexível hipotético. Para cumprir esta finalidade, foram realizados os seguintes ensaios: caracterização geotécnica, compactação, empregando-se as energ
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/02/2011
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10. Modelagem numérica da composição química da atmosfera e seus impactos no tempo, clima e qualidade do ar
Uma descrição geral da modelagem numérica da composição química da atmosfera é fornecida neste trabalho. Os papéis relevantes de alguns gases traço e aerossóis no balanço radiativo do planeta, na alteração do ciclo hidrológico e na poluição do ar são discutidos. Partindo da equação da continuidade, integrada no sistema de equações govern
Revista Brasileira de Meteorologia. Publicado em: 2009-06
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11. Um procedimento de retroanálise para pavimentos flexíveis baseado na teoria do ponto inerte e em modelagem matemática / A backcalculation procedure for flexible pavements based on inertial point theory and in mathematical modeling
A backcalculation procedure for flexible pavements is introduced based on inertial point theory for subgrade backcalculation readapted to theoretical deflection basins obtained with the load to Benkelman beam test. Beside subgrade backcalculation, it was developed a factorial mathematical model to obtain equivalent resilient modulus from the layers presents
Publicado em: 2007
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12. Analise parametrica da estabilidade de plataformas ferroviarias degradadas / Parametric evaluation of degraded railway subgrade stability
This study deals with an evaluation of subgrade capacity by determining the circular rupture stability risk of a slope adjacent to a railway yard track subject the tensions of a loaded gondola car parked in this track. The Eisenmann method is applied for determination of tensions at the railway subgrade and the tensions are calculated by means Carothers-Terz
Publicado em: 2007