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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

ConcepÃÃo de Modelos de AvaliaÃÃo de CondiÃÃes de Rolamento e indicaÃÃo de PriorizaÃÃo de Vias como Etapas de um Sistema de GerÃncia de Vias nÃo Pavimentadas / BUILDING EVALUATION MODELS OF UNPAVED ROAD SURFACE CONDITIONS WITH INDICATION OF RANKING PRIORITIES FOR MAINTENANCE INVESTMENTS

Ricardo Venescau de Oliveira Almeida 28 June 2006 (has links)
CoordenaÃÃo de AperfeiÃoamento de Pessoal de NÃvel Superior / Esse trabalho tem como intuito auxiliar na concepÃÃo de um Sistema de GerÃncia de Pavimentos â SGP, especÃfico para estradas de terra, contribuindo no desenvolvimento de duas etapas. A primeira, consiste na adaptaÃÃo de um mÃtodo norte-americana de avaliaÃÃo de condiÃÃes de rolamento de superfÃcies nÃo pavimentadas para ser utilizada em estradas de terra no municÃpio de Aquiraz, no Estado do CearÃ. A segunda, visa aplicar um mÃtodo, baseado em metodologia multicritÃrio de apoio à decisÃo (MCDA), no processo de priorizaÃÃo de estradas de terra considerando um conjunto de variÃveis que influenciam no funcionamento daquelas vias. O mÃtodo para priorizaÃÃo aplica o Analytic Hierarchy Process - AHP a partir de entrevistas com profissionais de engenharia, especializados na concepÃÃo e anÃlise de projetos viÃrios, divididas em cinco grupos, de acordo com a atuaÃÃo profissional: grupo de alunos de mestrado, grupo de mestres em engenharia de transportes, grupo de professores universitÃrios, grupo de funcionÃrios pÃblicos do Departamento de EdificaÃÃes, Rodovias e Transportes - DERT e grupo de consultores. Para auxiliar na aplicaÃÃo do AHP foi utilizado o software Expert Choice, o qual facilitou o cÃlculo da consistÃncia lÃgica das matrizes de comparaÃÃo e indicou, atravÃs de anÃlise de sensibilidade, a ordem de prioridade para intervenÃÃo nas vias estudadas do municÃpio de Aquiraz, no Cearà / This work aims to contribute to the conception of a Pavement Management System (PMS) focusing unpaved roads. The evaluation approach involves two stages: the first one consists in the adaptation of an evaluation methodology created to the North America road surface conditions. That modified methodology was used in unpaved roads in the district of Aquiraz, in the State of CearÃ, northeastern Brazil. The second stage aims at applying a multicriteria decision support method (MDSM) in the process of ranking maintenance investments in unpaved roads taking into consideration a group of key variables that were expected to influence the operation of those roads. The ranking method is supported by the Analytic Hierarchy Process (AHP) and it is based on interviews with engineering professionals specialized in the design and analysis of roadway projects. Those professionals were divided into five groups according to their professional skills: a group of students of a M.Sc. Course in Transportation Engineering; a group of professionals who already have obtained the M.Sc. degree in Transportation Engineering; a group of University lecturers; a group of professionals of the Department of Building, Roads and Transportation, of the Cearà State; and a group of consulting engineers. The Expert Choice Software was used to help in the application of AHP, mainly in the task of determining the logical consistency of the comparison matrices as well as in using sensibility analysis to find the most probable order of priority for maintenance investments in some roads of the study area

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