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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Utilização de madeira de Eucalyptus em estruturas de pontes.

Abdalla, Anna Cristina Pacheco Ballassini 15 April 2002 (has links)
O presente trabalho teve por objetivo o estudo teórico e experimental de uma ponte de madeira constituída exclusivamente de madeira roliça de eucalipto citriodora. Para tanto foram analisados e comparados diversos procedimentos teóricos desenvolvidos para dimensionamento dos elementos estruturais. Um programa desenvolvido com base no método dos esforços, numa planilha eletrônica permitiu o cálculo mais preciso da ponte, admitida como grelha simplificada. Foram ensaiadas ligações de peças roliças por anéis metálicos e estudados o efeito de sua deformabilidade no deslocamento global de vigas compostas bi-circulares. / The present work had as a main objective a theoretical and experimental study of a bridge constituted exclusively of round wood pieces of Eucalyptus citriodora. Several theoretical procedures which were developed for calculating the main bridge structural elements have been analyzed and compared. A program developed according to the efforts method in an electronic spread sheet has allowed a precise calculation of the bridge, admitted as simplified hiperestatic frames. Steel rings were utilized as a fastening system for connecting two round pieces together and the effects of their measured deformations under load was considered on the calculation of the global displacement of twin circular composed beams.
2

Utilização de madeira de Eucalyptus em estruturas de pontes.

Anna Cristina Pacheco Ballassini Abdalla 15 April 2002 (has links)
O presente trabalho teve por objetivo o estudo teórico e experimental de uma ponte de madeira constituída exclusivamente de madeira roliça de eucalipto citriodora. Para tanto foram analisados e comparados diversos procedimentos teóricos desenvolvidos para dimensionamento dos elementos estruturais. Um programa desenvolvido com base no método dos esforços, numa planilha eletrônica permitiu o cálculo mais preciso da ponte, admitida como grelha simplificada. Foram ensaiadas ligações de peças roliças por anéis metálicos e estudados o efeito de sua deformabilidade no deslocamento global de vigas compostas bi-circulares. / The present work had as a main objective a theoretical and experimental study of a bridge constituted exclusively of round wood pieces of Eucalyptus citriodora. Several theoretical procedures which were developed for calculating the main bridge structural elements have been analyzed and compared. A program developed according to the efforts method in an electronic spread sheet has allowed a precise calculation of the bridge, admitted as simplified hiperestatic frames. Steel rings were utilized as a fastening system for connecting two round pieces together and the effects of their measured deformations under load was considered on the calculation of the global displacement of twin circular composed beams.

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