Highway Bridges
Mostrando 1-12 de 12 artigos, teses e dissertações.
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1. Seismic evaluation and partial retrofitting of concrete bridge bents with defect details
Abstract The need for seismic retrofitting of bridges after severe earthquakes has become important in recent years. This study examines the seismic evaluation of concrete bents of highway bridges designed and implemented according to the 1990s regulations. Compared with the older codes, 1990s codes have more complex details for connections which are evaluat
Lat. Am. j. solids struct.. Publicado em: 30/09/2019
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2. Shear strength analysis of slabs without transverse reinforcement under concentrated loads according to ABNT NBR 6118:2014
Resumo A solicitação por cargas parcialmente distribuídas em lajes sem armadura transversal, frequente em tabuleiros de pontes, resulta na propagação horizontal da força cortante em direção aos apoios, situação na qual nem toda a largura da laje é mobilizada. Por esta razão, os modelos de resistência à força cortante de vigas e de resistência
Rev. IBRACON Estrut. Mater.. Publicado em: 18/07/2019
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3. Analysis of strengthening procedures of reinforced concrete highway bridges: a brazilian case study
Resumo O sistema rodoviário federal brasileiro é constituído em grande parte por pontes construídas antes de 1984. Assim, essas pontes possuem geometria e capacidade de carga incompatíveis com o tráfego atual. Nesse cenário, o objetivo deste estudo foi a avaliação dos procedimentos de alargamento e reforço empregados em uma ponte de concreto armado
Rev. IBRACON Estrut. Mater.. Publicado em: 2019-02
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4. Fatigue analysis and life prediction of composite highway bridge decks under traffic loading
Steel and composite (steel-concrete) highway bridges are currently subjected to dynamic actions of variable magnitude due to convoy of vehicles crossing on the deck pavement. These dynamic actions can generate the nucleation of fractures or even their propagation on the bridge deck structure. Proper consideration of all of the aspects mentioned pointed our t
Lat. Am. j. solids struct.. Publicado em: 2013-05
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5. Transverse load distribution of skew cast-in-place concrete multicell box - girder bridges subjected to traffic condition
Concrete multicell box-girder bridges are a common choice among the designers for various ranges of bridges. In order to provide safer and greater speed of traffic, the roadway is built as straight as possible. The use of skewed bridges has increased considerably in the recent years for roadway. The skewed bridges have quite different mechanical behavior fro
Lat. Am. j. solids struct.. Publicado em: 2013-03
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6. Impacto de condicionantes hidrológicas na definição de traçados rodoviários : aplicação na rodovia TO-247
The contribution of this research is given by the design of effective impacts of highways, through the expansion of the influence areas beyond the linear tracks, adding the assessment of the environmental sensitivity of watersheds in order to optimize the layout of road projects. It was produced an orderly and systematic approach of the cause and consequence
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
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7. Recomendações para o projeto e construção de estruturas com peças roliças de madeira de reflorestamento / Recommendations for design and construction of structures with roundwood from tree farms
The object of this work is to propose the draft for a handbook with recommendations for the design and construction of structures using treated roundwood originating from forest farming in Brazil. Roundwood structures were classified and characterized visually and mechanically. Guidelines were presented for the desing of bridges and barns with structural and
Publicado em: 2010
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8. Análise de fadiga em pontes rodoviárias de concreto armado / Fatigue analysis of reinforced concrete road bridges
As pontes rodoviárias de concreto armado estão sujeitas às ações dinâmicas variáveis devido ao tráfego de veículos sobre o tabuleiro. Estas ações dinâmicas podem gerar o surgimento das fraturas ou mesmo a sua propagação na estrutura. A correta consideração destes aspectos objetivou o desenvolvimento de um estudo, de forma a avaliar os esforç
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/08/2009
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9. Verificação à fadiga de pontes rodoviárias mistas (aço-concreto) / Fatigue analysis of composite highway bridges
Steel and composite highway bridges (steel-concrete) are currently subjected to dynamic actions, for example, variable magnitude due to vehicles traffic on the deck rough pavement. These dynamic actions can generate the fractures nucleation or even their propagation on the structure. The correct consideration of these aspects pointed out to an analysis metho
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 06/03/2009
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10. 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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11. 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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12. Análise de Vibrações em Pontes Rodoviárias Induzidas pelo Tráfego de Veículos sobre Pavimentos Irregulares / Vibration Analysis of Highway Bridges Induced by the Vehicle Traffic on Irregular Pavement Surface
Nesta dissertação, propõe-se uma metodologia para a analise da resposta dinâmica de pontes rodoviárias devido à travessia de comboios de diversos tipos de veículos sobre o tabuleiro irregular dessas obras de arte. Para tal, desenvolve-se uma análise paramétrica extensa com o objetivo de avaliarem-se os efeitos dinâmicos provenientes das irregularid
Publicado em: 2006