Traffic Loads
Mostrando 13-21 de 21 artigos, teses e dissertações.
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13. Estudo do impacto de veículos pesados sobre a infra-estrutura rodoviária através de simulação microscópica de tráfego / Study of heavy vehicles impact on highway infra-structure through microscopic traffic simulation
The objective of this research was to develop a method for establishing the effect of heavy vehicles characteristics and operation on highway infra-structure by using the results of a microscopic traffic simulation model. Therefore, two secondary objectives were defined. The first of them involved the attainment of a detailed database containing the characte
Publicado em: 2007
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14. Controle de vibrações em edifícios submetidos à ação de cargas dinâmicas utilizando amortecedor de massa sintonizando na forma de pêndulo / Vibration control of structures subjected to dynamic loads using tuned pendulum-shaped mass dampers
The ongoing progress of structural analyses and dimensioning, in addition to the continuous advancements in building techniques and material, has made it possible to build taller and more slender structures every day. These structures are also more vulnerable to excessive vibrations caused by dynamic loads like earthquakes, winds, waves, intense traffic, and
Publicado em: 2007
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15. Utilização de madeira de eucalipto de pequenas dimensões na fabricação de uma ponte protendida com madeira laminada colada / Use of small-sized eucalyptus wood to build a pre-stressed bridge with glued-laminated timber
This study aimed to build and evaluate the behavior of a highway stress-laminated timber bridge deck measuring 6m in length, 3.5 m width and 0.24 m thickness submitted to a load of 13 t. The deck was built with laminations made from eucalyptus logs of various thinning-originated specimens, with a mean diameter of 2.5 m and ages ranging between 8 and 19. To b
Publicado em: 2007
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16. Reavaliação do trem-tipo à luz das cargas reais nas rodovias brasileiras. / Re-assessment of bridge load model based on traffic data of Brazilian highways.
This work presents a model to verify the design traffic load model of the Brazilian code, based on real traffic at road bridges. First, it compares Brazilian load model with Eurocode 1 and AASHTO Standard and LRFD Specifications. Then, recent development and research on bridge traffic load models are presented, in Brazil and other countries. A verification m
Publicado em: 2006
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17. Modelagem e quantificaÃÃo da compactaÃÃo de latossolos cultivados com eucalipto / Pattern and quantification from compactation in the Latosols cultivated with eucalypt.
The harvest operations and wood transport involves intensive traffic of machines on the soil, which may traffic in a same line several times, or randomly. Besides the passes number, the wood load transported also may affect the soil compaction, when the applied pressures for the machines exceed its bearing support capacity, altering the place where the root
Publicado em: 2006
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18. Forest roads: geotechnical characterization and mechanical behavior of soils and soil-grits, loads of traffic and their effects / Estradas florestais: caracterização geotécnica e comportamento mecânico de solos e misturas solo-grits, cargas de tráfego e seus efeitos
A crescente mecanização e o aumento da produção da indústria florestal têm exigido veículos mais rápidos e mais especializados mecanicamente para se adaptarem às condições topográficas do local e para atender ás exigências do setor de engenharia florestal com relação ao transporte de madeira. O uso de veículos extra pesados no transporte de
Publicado em: 2006
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19. Use of stimulants, complaiunts of sleep and state of mood in professional drivers of truck / Uso de estimulantes, queixa do sono e estado de humor em motoristas profissionais de caminhão
The traffic accidents involving truck drivers put in risk the life of these professionals as well as the society in general. The consumption of stimulants and drugs of abuse, the sleep disturbance, the age, the fatigue and the rhythm of work; the imprudence, the conditions of the rail ways can be the main causes. There are few studies in Brazil articulating
Publicado em: 2005
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20. SOIL COMPACTION INFLUENCE ON SOIL PHYSICAL PROPERTIES AND ON CROP GROWTH AND YIELD / COMPACTAÇÃO DO SOLO E SUA INFLUÊNCIA NAS PROPRIEDADES FÍSICAS DO SOLO E CRESCIMENTO E RENDIMENTO DE CULTURAS
Sol compaction effects on soil and plants has been subject of several studies. However, several parameters are used to evaluate soil compaction like bulk density and soil penetration resistance, but these parameters are dependent of soil type and moisture, therefore, the study of a parameter that could compare the different soils would facilitate the soil co
Publicado em: 2005
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21. Nitric Oxide Partially Controls Coxiella burnetii Phase II Infection in Mouse Primary Macrophages
In most primary or continuous cell cultures infected with the Q-fever agent Coxiella burnetii, bacteria are typically sheltered in phagolysosome-like, large replicative vacuoles (LRVs). We recently reported that only a small proportion of mouse peritoneal macrophages (PMΦ) infected with a nonvirulent, phase II strain of C. burnetii developed LRVs and that t
American Society for Microbiology.