The aim of this master’s thesis is to design a footbridge across a river. The main objective is design and analysis of a footbridge supported by a steel arch. Stress ribbon is suspended on steel arch using hangers. The analysis of the structure has been carried out using ANSYS 12.0 and Nemetschek SCIA 2011.1 software, design checks using EXCEL in accordance with Eurocodes. Time dependent analysis was considered.

The aim of this thesis is the design and analysis of pedestrian bridge across the deep valley. There were designed three variants. The variant of structure, which combines stress ribbon with concrete arch, was chosen for the analysis. The optimal geometry was found using iteration methods with VBA Excel. The calculation model was made in software Ansys 19.0, considering phases of construction. The Ultimate limit state and the service limit state were evaluated as well as dynamic behavior of construction – modal analysis (eigenfrequencies and eigenshapes) and response to harmonic excitation. The design and assessment are according to the European standards.

Subject of the work is design of pedestrian bridge across the river Morava. There are compared 3 variants of structures. Thesis is focused on stress ribbon supported by arch. The geometry of initial stage has been searched to form self-anchored structural system. The structure is verified in according to the European Standards.

The subject of this thesis is alternative design of the pedestrian bridge over Brno reservoir near Veveří castle. Three preliminary studies are created. The chosen variant consists of a stress ribbon supported by a steel arches. Time dependent analysis of load cases effects during construction stages is calculated by ANSYS. The bridge is verified according to the European Standards.

The subject of this master’s thesis is to design an arch structure of a footbridge. The bridge deck will be formed by a stress ribbon and could be divided into three parts. The middle part will be suspended (on the outer edges) on composite steel and concrete arches. Outer parts of the bridge deck will be formed by stress ribbons. The model of this construction is created in a computational program ANSYS and the solution is non-linear. The design is according to European standards.

The subject of this master’s thesis is the design of footbridge across the river. The main objective is to analyse the superstructure which is formed by a stress ribbon and arch. The arch consists of two separate plan curved concrete arches and is associated with stress ribbon in the top. The analysis of the structure has been performed using MIDAS CIVIL 2011 software. Simplified calculations by hand or by EXCEL have been also carried out. Design of the superstructure's elements, pre-stressed tendons and reinforcement has been done according to EUROCODE. In the analysis, time dependent effects have been also taken into account.

The stress ribbon system has numerous advantages, that includes but are not limitedto: increasing overall stiffness, control deflections and reduction of materialsconsumption, which in turn, reduces the load and the cost. Nevertheless, its use isusually limited to bridges, in particular, pedestrian bridges; this can be attributedto the insufficient space that buildings’ usually have for end supports, or/and backstayedcables, that can accommodate the expected high pull-out forces occuring atthe cables’ ends. In this work, the roof of Västerås Travel Center, which will become one of the longestcable suspended roofs in the world, was chosen as a case study. The aim was toinvestigate the optimal technique to model the post-tensioned stress ribbon systemfor the roof structure using SAP2000, and to assess any possible reduction in thepull-out forces, deflections and concrete stresses. Subsequently, a conventional cablesuspended roof was simulated, using SAP2000, and compared to the post-tensionstress ribbon system in order to examine the potential of the latter. Moreover,the effects of temperature loads and support movements on the final design loadswere examined. Based on the study, a few practical recommendations concerningthe construction method and the iterative design process, required to meet thearchitectural geometrical demands, are stated by the authors. The results showed that the post-tensioned stress ribbon system reduces the concretestresses, overall deflections, and more importantly, reduces the pull-out forces by upto 16%, which substantially reduces the design forces for the support structures.The magnitude of these reductions was found to be highly correlated to the appliedprestressing force, making the size of the prestressing force a key factor in the design. / Konstruktioner med spännbandsystem bestående av bärande huvudkablar medpålagda plattor, ofta av betong, har många fördelar. Dessa fördelar inkluderarmen begränsas inte till ökad totalt styvhet, kontrollerade nedböjningar och reduceradmaterialförbrukning, vilket minskar lasten och kostnaden. Deras användningär dock vanligen begränsad till broar, särskilt gång- och cykelbroar, där det finnsutrymme för att förankra de höga utdragskrafterna från huvudkablarna. Motsvarandeutrymme finns sällan i byggnader. I det föreliggande arbetet har taket till Västerås Resecentrum valts ut som studieobjekt.Taket kommer att bli ett av väldens längsta kabelburna takkonstruktion.Syftet är att undersöka den optimala tekniken för att modellera ett efterspänt spännbandsystemför taket med hjälp av FE-programmet SAP2000 och att bedöma eventuellaminskningar på utdragskrafter, nedböjningar och betongspänningar. Däreftermodellerades en konventionell kabelburen takkonstruktion med SAP2000, och detjämfördes med det efterspända spännbandsystemet för att undersöka fördelarna avdet sistnämnda. Dessutom har effekten av temperaturlasten och upplagsrörelserundersökts på den slutliga modellen. Slutligen ges några praktiska rekommendationerom byggteknik och en iterativ dimensioneringsprocess som är nödvändig förarkitekturgestaltning och dess krav på geometri. Resultaten visar att det efterspända spännbandsystemet gav lägre betongspänningar,mindre totaltnedböjning, och ännu viktigare, mindre utdragskrafter. Krafterna minskade16%, vilket gav en minskning av konstruktionens horisontella upplagsreaktion.Storleken på reduktionen var direkt proportionell mot spännkraften, så förspänningär en nyckelfaktor vid dimensioneringen.

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 diploma thesis deals with a project of a pedestrian bridge across the valley. At first, there was a comparison of three options of a bridge, then the option of a prestressed concrete band was selected. The main aim of the diploma thesis is the design of the construction, the creation of a model in the programme Ansys 12.1 and the subsequent assessment in accordance with the current regulations.