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Předpjatý pás přes hluboké údolí / Stress ribbon bridge across the deep valleyTomisová, Gabriela January 2017 (has links)
The topic of this thesis is a design of stress ribbon bridge across the deep valley. The construction of the footbridge contains stress ribbon bridge with external cables and final prestressing tendons. The bridge deck is in a parabolic arc and the suspension cables are in two bend down parabolic arcs. The construction is reproduced for evaluation of longitudinal direction in the Ansys 14.0 programme and for transversal direction in the Scia Engineer 15.1 programme. The model was solved in several phases, nonlinerally. The pier was reproduced in the Scia Engineer 15.1 programme for local effect of action. The construction was evaluated for dynamic action. The construction is assessed according to the actual EN standards.
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Lávka pro pěší v Blansku / Footbridge in BlanskoUrbánek, Jan January 2017 (has links)
The subject of the thesis is design and check of steel load-bearing structure of a footbridge. The footbridge spans the river Svitava in the town Blansko. The span length is 24 metres. The structural design is spatial bar structure with two main trusses. The upper and lower chords are curved in the shape of circular arch and they are connected by diagonal bars. In the level of the upper and lower chords the beams are connected by floor beam. Horizontal rigidity of the upper and lower construction area is secured by bracings. The bridge deck is laid on the lower floor beam. The solution is the result of the comparison and evaluation of two variants.
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Lávka pro pěší / FootbridgeBlaška, Jan January 2017 (has links)
The subject of the final thesis is timber footbridge for pedestrians and cyclists over the Desna river in Loucna nad Desnou village. The length of the footbridge is 30 m, width 3 m and height is variable from 4 to 5 m. The footbridge is covered with roof inclination of 20° in transverse direction and the roof is arch in longitudinal direction. Roofing is metal sheet. The structure is three-dimensional truss consists of two truss connected by rafters, floor beams and by members of bracing. The 2D-truss consists of bottom chord, top arch chord and webs. There are end posts made of streel bracing frames. The material of structure is mostly glued laminated timber, then timber and steel. The steel is used for connectors and steel bracing frames.
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Půdorysně zakřivená oblouková lávka pro pěší / Plan curved arch footbridgeTrenz, Jan January 2012 (has links)
The scope of thesis is to design a curved arch footbridge. The main structure consists of composite deck supported by steel arch. The focus is on finding optimal shape of arch and proper cross-sections of elements. Bridge is analysed according to limit states.
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Slovácké divadlo I. / Theatre of Slovácko I.Zárubová, Veronika January 2018 (has links)
The subject of this diploma thesis is the location and design of a theater building in the body of a regional center - the town of Uherské Hradiště. The existing theater building is housed in a rented Sokolovna (sport-cultural building) on Tyršovo Square. There is also a small stage in a house on Mariánské náměstí. The capacity of the auditorium of the large scene is 370 spectators, corresponding to the needs of the city and the region. However the size of the stage is completely inadequate, the height of the flytower, the absence of back and side stages, Also, the workshops and warehouses are currently located away from the theater. The project addresses the current unfavorable situation of the theater, which is, in the long-term, interest to the city of Uherské Hradiště itself. For my own proposal I chose an unused site inside a meander of the Morava River. Besides direct contact with the river, the place is marked by its wide visual links to the surrounding areas and, at present, also the separation from the city center. As a result of the proposal, my hypothesis is that the overall regeneration and attraction of the embankment area will be enhanced by a proposed placement of a footbridge connecting both river banks. My aim was to build links between the theater and its outdoor spaces, which open up to the city with its publicly accessible areas. I believe that because of the chosen location on the embankment of the Morava river not only do I propose a public building but to extend the city center itself. One of the main objectives was to connect the natural element of the river and the surrounding environment with art, culture and the city itself.
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Půdorysně zakřivená konstrukce z předpjatého pásu. / Stress ribbon curved structureKocourek, Petr January 2013 (has links)
The theme of this doctoral thesis is research of footbridges curved in plan that are formed by stress ribbon. Recently, several noteworthy curved pedestrian bridges, which decks are suspended on their inner edges on suspension or stay cables, have been constructed. However, curved stress ribbon bridges have not been built so far. The goal of this study was to answer the question whether the use of curved stress ribbon structures is even possible. For this reason, in the first stage feasibility study of these structures has been prepared. Knowledge of both curved pedestrian bridges, which decks are suspended on their inner edge and straight stress ribbon has been used. For the mathematical modeling FEM software ANSYS was used. The obtained findings were further used to design a new type of a modern, aesthetic curved bridge for pedestrians. The structure is formed by slender reinforced deck, which is through the steel brackets on the inner side stiffened by steel section. Torsion of the deck, caused by curved structure and asymmetrical cross-section, is reduced by cable situated in the handrail. Footbridge span is 45 m, arc camber in plan is 10 m, free bridge width is 3 m. Described is a general structure effect, detail static and dynamic analysis was carried out. Designed structure including construction stages were experimentally verified on a fully physical functional 1:6 scale model. The thesis describes the model analogy used for the design of the model, its structural design and its implementation. The model was subjected to a series of load tests including the final ultimate strength test. Performed tests confirmed the good match of calculation with the reality, correctness of the design and high resistance of designed construction. Acquired results and experiences from design and realization of model form the basis for practical realization of studied structures.
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[pt] AVALIAÇÃO DE ÍNDICES MODAIS PARA IDENTIFICAÇÃO DE DANOS EM PASSARELAS METÁLICAS / [en] EVALUATION OF MODAL INDICES FOR DAMAGE IDENTIFICATION ON STEEL FOOTBRIDGESAUGUSTO CESAR MIRANDA FEIJAO 27 June 2023 (has links)
[pt] Dentre as diversas metodologias de detecção de danos, destacam-se os
métodos de identificação de danos baseados na resposta da vibração (Vibration-based damage identification - VBDI), uma vez que a deterioração presente em
elementos estruturais influencia diretamente na resposta dinâmica global e local
da estrutura ocasionando alterações nos parâmetros dinâmicos. As diferentes
abordagens encontradas na revisão de literatura para detecção dinâmica de danos
focam principalmente em estruturas unidimensionais ou retas, que, por sua vez,
podem não representar o comportamento dinâmico real de estruturas arrojadas
como pontes e passarelas com geometria diferenciada. Alguns índices modais,
nomeadamente curvatura modal, flexibilidade modal e energia de deformação
modal, foram avaliados para uma passarela de aço com geometria curva. Para isso
utilizou-se um modelo de elementos finitos da mesma, de onde foram extraídos
os modos de vibração tridimensionais. Além disso, um índice recentemente
proposto, denominado vetor resultante, que incorpora coordenadas modais
tridimensionais, também é avaliado e comparado aos índices mencionados
anteriormente. Os resultados mostram que a precisão dos índices na localização
de danos está correlacionada com a região da estrutura onde o dano se encontra.
Conclui-se então que para detecção de dano em uma estrutura real, é necessário
que se utilize mais de um índice de dano. O impacto da magnitude do dano na
acurácia dos índices é também estudado. A influência do dano nas vigas
adjacentes e como isso se reflete nos índices também é investigada, a fim de evitar
ambiguidade na localização de danos, e para direcionar corretamente programas
de inspeção e monitoramento da integridade estrutural. / [en] Among the various damage detection methodologies, the Vibration-based
damage identification (VBDI) methods stand out, since the deterioration present
in structural elements directly influences the global and local dynamic response
of the structure, causing changes in the dynamic parameters. The different
approaches found in the literature review for dynamic damage detection focus
mainly on one-dimensional or straight structures, which in turn may not represent
the actual dynamic behavior of bold structures such as bridges and footbridges
with different geometry. Some modal indices, namely modal curvature, modal
flexibility, and modal strain energy were evaluated for a steel footbridge with
curved geometry. For this purpose, a finite element model of it was used, from
which the three-dimensional mode shapes were extracted. In addition, a recently
proposed index, called resultant vector, which incorporates three-dimensional
modal coordinates, is also evaluated and compared to the aforementioned ones.
The results show that the accuracy of the indices for damage localization is
correlated with the region of the structure where the damage is located. It is then
concluded that for damage detection in a real structure, it is necessary to use more
than one damage index. The impact of the damage magnitude on the accuracy of
the indices is also studied. The influence of damage in adjacent beams and how
this is reflected in the indices is also investigated in order to avoid ambiguity in
damage location, and to correctly direct inspections and structural integrity
monitoring programs.
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Půdorysně zakřivené konstrukce podepřené oblouky / Plan curved structures supported by archesTrenz, Jan Unknown Date (has links)
The aim of this doctoral thesis is the research of the plan curved footbridges with the deck supported by arch. The research is preceded by the survey of present findings about arch structures with upper deck. The summary of reasons and difficulties of design of plan curved structures follows. The appropriate approach for design of plan curved structure is searched on the basis of methods for design of straight structure. The design of arch which is subjected to minimal bending moments is emphasised. At first, the structure is designed in the same way as straight structure and the limit plan curvature (for which the method is not suitable anymore) is sought. Then the approach based on method of inversion of suspended cable is examined and adapted for designing of plan curved arch geometry. The approach is thoroughly analysed through calculation model and experimentally verified on physical model in scale 1:10. The process of design, construction and testing of the physical model is described in detail. Measured deformations and stresses are compared with expected behaviour based on numerical analysis. The comparison proves good correlation between calculation and measurement, as well as high load bearing capacity of the structure.
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[pt] IDENTIFICAÇÃO MODAL DE DANOS EM PASSARELAS METÁLICAS COM USO DE REDES NEURAIS ARTIFICIAIS / [en] MODAL IDENTIFICATION OF DAMAGE IN STEEL FOOTBRIDGES USING ARTIFICIAL NEURAL NETWORKVITOR ABRAHAO GONCALVES 22 March 2022 (has links)
[pt] As estruturas civis durante toda a sua vida útil estão sujeitas a diversas ações
de deterioração, desgastes ou corrosão de seus membros, que podem gerar
variações em suas características físicas. Estas ações podem causar danos ao seu
funcionamento, podendo chegar até ao colapso, em casos mais extremos. Além
disso, o avanço tecnológico que permite a concepção de estruturas cada vez mais
esbeltas, e que geram assim possíveis vibrações excessivas, elevam o
monitoramento estrutural a um patamar de extrema importância e atenção na ótica
dos gestores desses sistemas. Particularmente, no caso de obras de infraestrutura
como pontes e passarelas, as grandes dimensões são características significativas
que tornam as práticas de monitoramento e inspeção mais difíceis. Dessa forma,
com o objetivo auxiliar no monitoramento estrutural e direcionar inspeções
visuais, diversos métodos de identificação de danos são estudados com base nas
características dinâmicas das estruturas, como as frequências naturais e os modos
de vibração. A revisão de literatura, porém, demonstra que há uma dificuldade na
aplicação desta identificação em estruturas mais complexas de grande porte.
Assim, este trabalho visa estudar esta dificuldade e propor uma solução baseada
na construção de um índice, composto pelos modos de vibração. Além disso,
através da aplicação de algoritmos de aprendizado de máquina e de
reconhecimento de padrões, como as Redes Neurais Artificiais (RNAs), propõese aumentar a eficiência do processo de localização espacial e quantificação dos
danos. Em seguida, a metodologia proposta é, então, aplicada em um modelo de
passarela metálica inspirado em uma estrutura real presente na região do Terminal
Centro Olímpico da cidade do Rio de Janeiro – RJ. A identificação de danos é
estudada através da aplicação do índice proposto, incorporando as redes neurais e
avaliando do impacto da variação dos parâmetros da RNA na eficiência global da
detecção. / [en] Civil structures are subjected to different deterioration and corrosion actions
throughout their entire service life, which can generate variations in their physical
characteristics. These actions can cause damage to its functioning, and possibly
leading to collapse in more severe cases. In addition, technology development
which allows the design of increasingly slender structures, can produce excessive
vibrations, which elevates the importance ofstructural monitoring to a higher level
from the perspective of infrastructure managers. Particularly, in the case of
bridges and walkaways, due to their large dimensions make monitoring and
inspection even more difficult. Thus, with the aim of providing methods to assist
in structural monitoring and facilitate visual inspections, several damage
identification methods are investigated, which are based on structures dynamic
characteristics, such as natural frequencies and mode shapes. The conducted
literature review revealed that there is a difficulty in applying these identification
methods in large-scale and complex structures. Thus, this research aims to study
these barriers and propose a solution based on the development of a new damage
index based on the structure s mode shapes. Furthermore, through the application
of machine learning algorithms and pattern recognition, such as Artificial Neural
Networks (ANN), it is proposed to increase the efficiency of the damage
identification and quantification process. Then, the proposed methodology is
tested numerically on a steel footbridge model inspired by a real structure located
in the region of the Olympic Center Terminal, in the city of Rio de Janeiro – RJ.
The damage identification method is studied through the application of the
proposed damage index, incorporating the neural network and assessing the
impact of ANNs parameters variation in the global efficiency of the damage
detection method.
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Územní studie rozvojového území Vítkovice - Moravská Ostrava / Urban study of development area Vítkovice - Moravská OstravaFišerová, Anna January 2016 (has links)
'The inspiration behind this project is the new urbanist idea which combines residential development with green spaces for leisure and sport as well as mixed use commercial areas and storage. The layout of the area is a grid formed by 100m squared plots with residential houses with personal yards. These plots are grouped as complexes and between each complex is a communal green space. On the outside of the inner grid, there are mixed use apartment buildings and a high commercial floor. The square is dominated by a smaller multi-purpose building with a fluid outside space in which community events can be organized. Diagonally connected to the square is a park with a playground and an area with patio seating in addition to three villa houses. The park leads to the river embankment, into which tiered seating will be created. Around the hotel, there is another park with a multi-generational playground. In the northern part is located hotel renovated from the original industrial buildings with added ground floor restaurant area. Around hotel there is a park with green space and multi-generational playground. The terrace houses are located in the northeastern part of the complex and feature an attractive riverside view. Row houses line the the main road and are buffered from street noise by a line of trees. Typology and placement of other, separate houses is inspired by colonies of worker-houses eg. Baťa houses in Zlín. In between each ground these is no fence and are only separated a slight depression in the green.
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