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Master's Dissertation
DOI
10.11606/D.18.2016.tde-03062016-101420
Document
Author
Full name
Thalita Fernandes da Fonte
Institute/School/College
Knowledge Area
Date of Defense
Published
São Carlos, 2004
Supervisor
Committee
Calil Junior, Carlito (President)
Dias, Antonio Alves
Prata, Dener Gonçalves
Title in Portuguese
Pontes protendidas de Eucalipto citriodora
Keywords in Portuguese
Pontes de madeira
Pontes em placa
Pontes protendidas
Protensão transversal
Superestruturas de pontes
Abstract in Portuguese
O conceito de pontes de madeira em tabuleiro laminado protendido surgiu na década de 70, no Canadá, como forma de reabilitação para tabuleiros laminados pregados. Diversas pesquisas foram desenvolvidas para verificar o desempenho estrutural e a durabilidade do sistema, e estes estudos comprovaram a eficácia do método. Devido ao enorme déficit de pequenas e médias pontes em todo o seu território, o Brasil tem buscado cada vez mais materiais e tecnologias alternativas economicamente competitivas para sua construção. Partindo de pesquisas desenvolvidas em outros países, desde 1993 começaram a ser desenvolvidas pesquisas nacionais para verificar a viabilidade em se utilizar madeiras brasileiras para construção de pontes, e a resposta, mais uma vez, foi positiva. Este trabalho tem como objetivos o estudo teórico e experimental das pontes de eucalipto protendidas transversalmente, através do projeto e construção da primeira ponte protendida de madeira da América do Sul. Por meio de provas de carga, foi avaliado o desempenho da ponte e a influência dos guarda-rodas e defensas na rigidez do tabuleiro. Os resultados mostram que o sistema protendido de eucalipto é uma ótima alternativa para o Brasil.
Title in English
Pre-stressed timber bridge of Eucalyptus citriodora
Keywords in English
Bridges in decks
Bridges superestructures
Pre-stressed timber bridges
Timber bridges
Transversal pre-stressed
Abstract in English
The concept of pre-stressed laminated timber bridges come from 70s, in Canada, as an alternative for the rehabilitation of damaged nailed laminated timber decks. Many researches were developed to verify the structural performance and the durability of the system, which corroborated the system's high efficience. Because of a great deficit in short-span and medium-span bridges in Brazil, the country has searched more and more competitive materials and technologies for their construction. Based on studies developed in other countries, since 1993 Brazil has developed studies to verify the viability of using brazilian woods to build such bridges, and the answer was positive. The present work aims to investigate the project and behavior of transversally pre-stressed timber bridges of eucalyptus, through the project and construction of the first stress-laminated timber bridge in South America. The bridge performance was evaluated as well as the influence of the guard-rail system in the deck stiffness, across proof loading. The results showed that this system is a good alternative for bridge construction in Brazil.
 
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Publishing Date
2016-06-03
 
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