Este trabalho aborda um tipo de passarela que está ganhando bastante notoriedade internacionalmente. Inúmeras obras vêm sendo construídas em diversos países, embora no Brasil ainda seja quase desconhecida. Basicamente, a estrutura é composta por cabos livremente suspensos, sobre os quais se apóia o tabuleiro formado por elementos pré-moldados de concreto. A protensão é utilizada como forma de enrijecer o conjunto. Dentre suas principais características, estão a rapidez e a facilidade de execução, a estética bastante agradável e o custo competitivo. Inicialmente, apresenta-se uma conceituação básica e um estado da arte. Em seguida, é estudado o comportamento estrutural da passarela. Alguns tópicos relativos à análise dinâmica e às fundações são brevemente comentados. Finalizando a dissertação, é feita uma aplicação numérica, enfatizando os aspectos que a diferenciam das estruturas convencionais / This work treats a kind of pedestrian bridge that is standing out internationally. Several structures have been built in different countries, although they are almost unknown in Brazil. Basically, the deck is formed by precast concrete elements over free suspended cables. Prestressing is applied behind the abutments to provide rigidity to the structure. Quick and easy to assemble, aesthetically beautiful and the competitive cost are some of their main features. First, the basic concepts and a state of art are presented. Then, the structural behavior is studied. Some questions related to dynamic analysis and foundations are briefly commented. Ending the dissertation, an example is done, with emphasis to the aspects that make the stress-ribbon a non-conventional structure

Este trabalho aborda um tipo de passarela que está ganhando bastante notoriedade internacionalmente. Inúmeras obras vêm sendo construídas em diversos países, embora no Brasil ainda seja quase desconhecida. Basicamente, a estrutura é composta por cabos livremente suspensos, sobre os quais se apóia o tabuleiro formado por elementos pré-moldados de concreto. A protensão é utilizada como forma de enrijecer o conjunto. Dentre suas principais características, estão a rapidez e a facilidade de execução, a estética bastante agradável e o custo competitivo. Inicialmente, apresenta-se uma conceituação básica e um estado da arte. Em seguida, é estudado o comportamento estrutural da passarela. Alguns tópicos relativos à análise dinâmica e às fundações são brevemente comentados. Finalizando a dissertação, é feita uma aplicação numérica, enfatizando os aspectos que a diferenciam das estruturas convencionais / This work treats a kind of pedestrian bridge that is standing out internationally. Several structures have been built in different countries, although they are almost unknown in Brazil. Basically, the deck is formed by precast concrete elements over free suspended cables. Prestressing is applied behind the abutments to provide rigidity to the structure. Quick and easy to assemble, aesthetically beautiful and the competitive cost are some of their main features. First, the basic concepts and a state of art are presented. Then, the structural behavior is studied. Some questions related to dynamic analysis and foundations are briefly commented. Ending the dissertation, an example is done, with emphasis to the aspects that make the stress-ribbon a non-conventional structure

The aim of the doctoral thesis focuses on the static and dynamic analysis of a plan curved cable stayed and suspension pedestrian bridges suspended on a single-side of their deck. The first part of this thesis deals with an analysis of the equilibrium in the transversal direction of a deck cross section suspended on a single-side. The section and its arrangement should be designed so that the torsion caused by the deck self-weight and dead load would be minimal. This theory was verified on a simple study of a single-sided suspended section with and without prestressing. Second part of the thesis deals with the design of a study of a plan curved cable stayed pedestrian bridge. The study describes in detail a finding of an initial state of the structure and the static and dynamic analysis performed by software ANSYS. The static analysis describes the response of the structure on the most frequent variable loads only, but not design of dimensioning according to the valid codes. The dynamic analysis verifies a predisposition of the structure to the vibrations and others harmful oscillation effects. The next objective of the thesis was to design a study of a plan curved suspension pedestrian bridge suspended on a single-side. A process of an analysis of these structures has not found in any available references. Especially, the finding of an initial state of a suspension cable has not been documented anywhere and by anybody. The study was analyzed with the same geometry as the cable stayed variation in order to compare both structures. The static and dynamic analysis was performed, too. The last part of the thesis describes the verification of structural solution on a fully functional model in a 1:10 scale, proposed process of the initial state finding, response of the structures on the loading and ultimate load test. The important step is the comparison of the results of the completed physical model and the calculation model.