Escuela de Arquitectura - Tesis Doctorales y Tesinas - 2000-2009

Permanent URI for this collectionhttps://hdl.handle.net/10171/42516

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    Aspectos teóricos y prácticos del comportamiento sísmico de uniones mixtas semirrígidas: análisis, ensayos y simulaciones
    (2015) Gracia-Rodríguez, J. (Javier); Bayo, E. (Eduardo); Goñi, R. (Rufino)
    The most important aspects of a structure when it has to be designed against seismic actions are: resistance capacity, ductility capacity and the amount of energy dissipated during the seismic excitation. The combination of steel and concrete, in composite elements, leads to an improved behaviour due to the increment in the stiffness and the resistance of the main sections, while at the same time, the ductile behaviour of composite structures is similar to the one exhibited by steel structures. In the last few years composite structures have become very popular in the building industry; however their use in seismic zones is reduced, due to the lack of knowledge about their behaviour against seismic actions. The main focus of this dissertation is to describe the behaviour of a double sided extended end plate composite joint. Several tests of full scale substructures have been performed to evaluate the main properties of this proposed joint. The data collected from the test is used to simplify the behaviour of the joint in a model of two rotational springs that is used to perform seismic simulations. Three frames of different heights and spans are analysed. For each frame and each type of slabs two pushover analysis are performed to evaluate the ultimate capacity of the frame. Incremental dynamic analyses are also performed to evaluate the seismic properties of each frame with three different accelerograms matching three types of elastic response spectra. The data from the simulations is used to evaluate the seismic behaviour, the characteristics of this type of joint when applied to moment resisting frames, and to ensure the improved behaviour of this structural typology under seismic actions.
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    Metodología práctica para el diseño de pórticos de estructura mixta con uniones semi-rígidas
    (2015) Gil-Rodríguez, B. (Beatriz); Bayo, E. (Eduardo)
    Composite structures are based on an optimal use of the mechanical characteristics of both materials that compose them: steel and concrete. Despite of their many advantages, especially when combined with semi-rigid joints, their use in building is not very common. The use of these systems on a daily basis requires that new design methods and useful tools for semi-rigid composite joints to be studied. This investigation proposes analysis methods for composite structures with semi-rigid connections, the starting point being the required stiffness that leads to a better bending moment distribution. Together with the simplified joint design method also proposed herein, the number of necessary iterations to define a structure is reduced and, at the same time, an optimization is obtained. With the aim of achieving a more exhaustive knowledge of the semi-rigid composite joint behaviour several full-scale tests are carried out. These tests introduce an innovation with respect with the conventional configuration which consists of inserting the central reinforcement bars through the column flanges in order to improve the behaviour. Subsequently, finite element models are carried out which are validated with the experimental results until reliable models are achieved. These models are used to compare the performance of the conventional joints with the proposed alternative design. The proposed design for internal joints shows improved behaviour, which is more acute as the moments on each side of the joint become increasingly unbalanced. Regarding external joints, the same values are obtained as with the conventional design but without the need for a cantilever. A parametric study is also carried out on external and internal joints following the alternative design in order to define the components which intervene in it and to develop the corresponding analytical model by adapting the component method to the proposed joint characteristics. These modifications make the prediction of the joint characteristics match the real behaviour with good accuracy.
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    Nuevas propuestas para el diseño de pórticos y uniones semirrígidas de acero
    (2015) Cabrero-Ballarín, J.M. (José Manuel); Bayo, E. (Eduardo)
    The use of semi-rigid joints is among the novelties incorporated in Eurocode 3. The benefits of semi-rigid joints are extensively documented, but they are not really used much in practice. There is a lack of appropriate design methods, models and tools. In this thesis a design method suitable for semi-rigid joints is introduced. The proposed method allows to optimize not only the size of the structural profiles, but also the joint design to match the optimal theoretical values. Pre-design methods for semi-rigid extended end-plate joints are also provided to easily check the feasibility and suitability of a particular connection design. The thesis has also introduced the semi-rigid behaviour of three-dimensional joints. An experimental investigation of statically loaded extended end-plate connections in both major and minor column axis was undertaken at the University of Navarra, Spain. The aim was to provide insight into the behaviour of these joints when loading is applied to both axes (threedimensional loading). A new component for laterally supported plates in bending (applied to the column web and the additional plate in bending) is presented and applied to minor axis joints. Also, complete elastic models for both major- and minor-axis three-dimensional joints are developed. The proposed formulation takes into account the stiffening effects of each component caused by the loads applied to both axes.
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    El aire acondicionado como factor de diseño en la arquitectura española: Energía materializada
    (Servicio de Publicaciones de la Universidad de Navarra, 2014) Martín-Gómez, C. (César); Pozo-Municio, J.M. (José Manuel)
    El objetivo de esta tesis doctoral es reflexionar acerca del papel de las instalaciones de aire acondicionado en el diseño arquitectónico, así como analizar cuál ha sido su protagonismo en la génesis de la propia arquitectura por las servidumbres que generan. En la tesis se pretende demostrar como los edificios que han sido referencias arquitectónicas en el pasado siglo XX español, también han sido sobresalientes en la forma de integrar las instalaciones de aire acondicionado en los edificios, y se reflexionará acerca de si esa actitud es necesaria al plantearse conseguir nuevos modelos de arquitectura. Se analizarán las instalaciones de aire acondicionado de algunos de los edificios más significativos de la historia arquitectónica española del siglo XX en los que estas instalaciones han tenido un papel protagonista, y a partir de dicho análisis se extraerán conclusiones sobre cómo se han diseñado y ejecutado esas instalaciones en relación con el proyecto arquitectónico, de modo que las conclusiones sirvan para la actividad profesional de la arquitectura actual.
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    La dimensión arquitectónica en el origen del planning británico
    (Servicio de Publicaciones Universidad de Navarra, 2011) Aseguinolaza-Braga, I. (Izaskun); Luque-Valdivia, J. (José)
    From its beginnings, in the early 20th century, British Town Planning has confronted both social and formal aspects as one, and thus has proposed a close relationship between architecture and Town Planning. This unity between architecture and urbanism is found especially in the origin of planning, and furthermore has been compatible with the general conviction that planning and architecture were different disciplines. In this sense, the investigation analyses the programmatic and methodological formulations of main British authors from the beginnings of the campaign for the institutionalization of Town Planning to the promulgation in 1932 of the Town and Country Planning Act. An exam considering the process of evolution of planning in relation to architecture, makes possible the identification of what kind of connections can be found between these two disciplines. This way we can check first how, in planning (in Town Planning as much as in Country Planning), there is an architectural dimension that informs all the discipline and second how this dimension can be found in any scale with different but specific contents. This analysis will be useful for the reflection of current urban and regional British planning; so that present urban practice that guides the building of the cities can incorporate again to urban planning the consideration of formal aspects to which it gave up with the Town and Country Planning Act of 1968.