Comunicaciones a congresos UPV

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En esta comunidad se tiene acceso al texto completo de Jornadas y Congresos organizados realizados en la Universitat Politècnica de València, (UPV). Su objetivo es aumentar la visibilidad de estos documentos, así como garantizar su preservación.

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1998-2011, la experiencia de DC
(Universitat Politècnica de València, 2012-03-04) García Vergara, Marisa; Garnica, Julio; García, Carolina B.
El objetivo de esta comunicación es presentar una experiencia concreta de difusión en el campo de la investigación arquitectónica, ligada a la publicación de una revista fundada y dirigida por estudiantes de programas de tercer ciclo de la UPC. Una experiencia educativa que abarca desde la creación a la edición, dirección y distribución de la revista. La difusión, en este caso concreto, se presenta tanto como un proyecto de investigación en sí mismo, como también de divulgación de los resultados de investigaciones concretas, que representan los trabajos realizados en el marco de los diversos programa de postgrado, así como de las tesis en elaboración o leídas en la universidad, que constituyen el cuerpo mayoritario de los materiales publicados en la revista. Además, la creación de la revista representa una experiencia de autogestión en el ámbito del aprendizaje universitario así como un buen ejemplo de vinculación de la investigación universitaria con la sociedad.
39 etc... : Heinz Isler's infinite spectrum of new shapes for shells
(Editorial Universitat Politècnica de València, 2009-11-25T08:32:07Z) CHILTON, John
The first Congress of the International Association of Shell Structures (now IASS), held in Madrid in 1959, was the occasion when Heinz Isler's innovative methods for determining the shape and constructing reinforced concrete shells first became widely known. Although he had introduced his ideas at smaller conferences as early as 1955, his Madrid paper `New Shapes for Shells' (Isler [1]) was presented in front of some of the most eminent shell designers of the day. This paper included a diagram showing 39 alternative shell forms with the abbreviation "etc." at the bottom right-hand corner indicating that Isler believed there were many more possibilities yet to be revealed. Contemporary accounts of the discussion describe how his presentation completely astounded the assembled audience, which included renowned engineers such as Torroja, Esquillan and Arup. On the 50th anniversary of his presentation the content of the original paper and subsequent debate are reviewed. Isler's form-finding and analysis was unassisted by modern digital design aids yet he was able to create efficient and economical structures of great elegance. His design and construction methods will be described and some examples of his shells, both built and unbuilt will be presented. The paper concludes with a brief discussion of the influence that Isler's unconventional design philosophy, methods and extremely graceful shells have had on the development of free-forms in architecture over the last 50 years and hopefully will continue to have into the future.
50 years in the Design of Towers and Masts. From IASS Recommendations to Current Procedures
(Editorial Universitat Politècnica de València, 2009-11-25T09:44:30Z) SMITH, Brian
Up to the 1970s there were no recognized design procedures for the analysis and design of guyed masts. This was recognized in the industry in the early 1960s, when there was a rapid growth of these structures to accommodate the growth in radio and television broadcasting. Accordingly a Working Group of the IASS (WG4) was set up to examine the behaviour of these structures and to produce Recommendations for their design and analysis. These Recommendations were published in 1981 and they have formed the basis for the production of national and international codes for these structures since that date. The Recommendations contained innovative ideas at that time, including the treatment of relative structural reliability, the use of dynamic response procedures and the statistical treatment of wind actions. Such procedures have been adapted since in many design codes outside the field of towers and masts. This paper reviews the development of design procedures for both towers and masts, the background to the Recommendations and explains how these have been developed and applied in national codes (Australia, Canada, United Kingdom) and latterly in the published Eurocode for Lattice Towers and Masts.
A pie de obra: Miradas frente a la arquitectura
(Universitat Politècnica de València, 2012-03-04) Castellanos Gómez, Raúl; Domingo Calabuig, Débora; Sentieri Omarrementeria, Carla; Dpto. de Proyectos Arquitectónicos; Escuela Técnica Superior de Arquitectura; Grupo de Proyecto Arquitectura
Las obras de arquitectura, con toda su concreción y especificidad, son las auténticas depositarias de un conocimiento que trasciende la palabra escrita. El presente artículo aboga por situar al investigador en arquitectura figuradamente a pie de obra, como el arquitecto que desciende a la realidad tangible de los hechos tras un largo e intenso período de reflexión. El enfrentamiento directo, cara a cara, con la obra podría llegar a ser el método para construir una teoría operativa que, alejada de los discursos eruditos, tuviera la capacidad de incidir de nuevo en el proyecto arquitectónico.
About the freedom of free forms
(Editorial Universitat Politècnica de València, 2010-01-26T13:17:06Z) ANDRES, Oscar A.
This paper deals with the arrival of freedom at the world of structures giving birth a new generation of forms: the free forms. Its purpose is to analyze, to discuss and to comment critically this singular fact as well as their implications on the designers' task. It is more a philosophical than a technical paper. For centuries man has imagined new forms for their structures but he has not been always able to analyze and to build them. Before the arrival of the electronic calculus, the representation and analysis of structural forms could be limited to those ones belonging to the Euclidean Geometry. The computers broke those limitations and they gave wide freedom to the designers to conceive a new generation of forms; these new forms were called "free forms". Nowadays any form imagined can be represented, it can be analyzed and it can be built. Nevertheless not any imagined form can become a structural free form. Perhaps it could be a beautiful sculptural form, but not necessarily a structural one. For being a structural form, the inescapable laws of the mechanics must be satisfied. Moreover a structural free form can become an architectural free form just only when aesthetical, functional, environmental and social requirements, among others, are accomplished. Freedom has widened the horizons of creativity for the designers' task. Simultaneously new responsibilities have come altogether with this freedom. Today free form designers face permanent challenges; designers must be familiar with the menus of new and multiple tools created by the modern technology and they must be trained to make the right use of them. They must handle those wide menus in order to select the most appropriated options to generate, to model and to analyze the new free forms. At the same time they must select the most appropriated new materials and techniques to build these free forms. Finally, designer must be fully conscious of the high impact of their engineering and architectural works on the people and physical environment without forgetting their commitment to the society.
Accurate solution of some I-beam optimization problems
(Editorial Universitat Politècnica de València, 2009-12-11T22:45:14Z) GORDEIEV, Vadym
The problem of proportioning an assembled steel I-beam made of three sheets is wellknown. It is included in nearly every course of study where the analysis of steel components is involved. In the presented case we consider finding the depth of a beam with a predefined modulus of resistance, based on the condition that the cross sectional area should be minimum. Such a depth of the beam is generally called optimum. At the same time, the minimum depth of the beam, which can be found from the stiffness conditions, can be considered in addition to its optimum depth. Such a problem is generally solved by empirical approaches with no strict formulation nor a proper mathematical analysis. The paper poses the problem as that of parametric mathematical programming with inequality constraints which appear as the condition of strength in bending, the condition of strength in shear, and the stiffness condition. Several variations which differ in the functional relationships between the depth of the beam¿s web and its thickness have been analyzed.
La acústica de las catedrales andaluzas: un proyecto I+D interdisciplinar para la recuperación del patrimonio cultural
(Universitat Politècnica de València, 2012-03-14) Zamarreño García, Teófilo; Girón Borrero, Sara; Galindo del Pozo, Miguel; Suarez Medina, Rafael
La política científica prima la financiación de proyectos de investigación multidisciplinares, realizados por equipos de tamaño y composición acordes a sus objetivos. Dada la naturaleza de la investigación en Arquitectura y Urbanismo, no debe resultar difícil montar proyectos de este tipo en líneas prioritarias, con equipos compuestos por investigadores de diversas áreas y completados con los de otras disciplinas. En este trabajo se presenta la reciente experiencia de un proyecto interdisciplinar sobre Patrimonio Cultural presentado a la convocatoria del Plan Nacional I+D+i de 2010. Además de describir la composición del equipo, los objetivos, la metodología y algunos resultados previos, aspectos todos ellos claves para su concesión, incidimos también en un aspecto fundamental: la transferencia de resultados. Para reforzar este valor del proyecto, el mismo equipo ha acudido a otra convocatoria autonómica con una empresa andaluza de base tecnológica.
Adaptive planar structures
(Editorial Universitat Politècnica de València, 2010-02-24T11:37:32Z) WEILANDT, Agnes
Panes and shells as only in-plane loaded structural elements play an important role in lightweight structures. However their great bearing capacity will be reduced significantly when their homogeneous stress distribution is disturbed. These disturbances can be caused for example by cuttings or constraints. Present research to reduce the disturbances by form optimization of the cuttings or by adding local bracing elements can only respond to particular loading conditions. Adaptive structures are a new innovative alternative for the optimization of panes and shells. With the use of sensors, control units and actuators they can register different external stimuli and adapt to them. This allows an optimal reaction to different loading conditions and so a reduction of the disturbances in the homogenous stress distribution.
Advanced form-finding for cable dome structures
(Editorial Universitat Politècnica de València, 2010-02-24T08:29:31Z) LEE, Jaehong; TRAN, Hoang Chi; LEE, Kihak
A numerical method is presented for form-finding of cable domes. The topology and the types of members are the only information that requires in this form-finding process. Dummy elements are used to transform the cable dome with supports into self-stressed system without supports. The eigenvalue decomposition of the force density matrix and the Singular value decomposition of the equilibrium matrix are performed iteratively to find the feasible sets of nodal coordinates and force densities which satisfy the minimum required rank deficiencies of the force density and equilibrium matrices, respectively. Based on numerical examples it is found that the proposed method is very efficient, robust and versatile in searching self-equilibrium configurations of cable dome structures.
The Almuñecar aquarium textile roof
(Editorial Universitat Politècnica de València, 2010-02-24T08:36:08Z) LLORENS DURAN, Josep Ignasi
The Almuñecar Aquarium is a 3000 m2 underground installation that shows Mediterranean fauna on two levels below the Kuwait Square next to the market and near the City Hall of the andalusian town of Almuñécar (Spain). The Aquarium emerges to the surface by means of its control building, staircase and lift, all arranged around an open courtyard. We designed a textile roof in order to protect this courtyard from direct sunshine and rain. As the only part of the building that shows above is the membrane, it has also been envisaged as an eye catcher in order to attract visitor's attention. Two water ponds reflect the white and lofty membrane set in front of the backdrop of white apartment buildings.
El Análisis de la Arquitectura Tradicional como base para el Diseño Aplicado: Proyecto DATEC. Arquitectura del Rojo
(Universitat Politècnica de València, 2012-03-14) Rivera Gómez, Carlos; Rodríguez García, Reyes; Ponce Ortiz de Insagurbe, Mercedes; González Serrano, Ana; Roa Fernández, Jorge
La Arquitectura Tradicional Andaluza se contempla como objeto de estudio en un proyecto de I+D+I dirigido y promovido por la fundación SURGENIA (Centro Tecnológico Andaluz del Diseño) y denominado DATEC: "Espacios innovadores pensados para el usuario y basados en el concepto de vida andaluza". El análisis trata de identificar aquellos invariantes que, por su valor cultural, calidad estética, nivel medioambiental y riqueza etnográfica, mejor identifiquen lo andaluz en el terreno de la arquitectura anónima tradicional de la región. Dado el tipo de investigación, esta implica una amplitud del espectro y una pluridisciplinaridad en el análisis: documental, antropológico, ambiental, constructivo, material y semántico.
Análisis de las colecciones digitales mediante una aplicación informática específica: la experiencia de la Universidad de Salamanca
(Universitat Politècnica de València, 2010-10-22) Gutiérrez Palacios, Lourdes
Mas de la mitad del presupuesto destinado a la adquisición bibliográfica de la Universidad de Salamanca se invierte en recursos electrónicas, si tenemos en cuenta la inversión realizada y el creciente aumento de los precios marcado por la industria de la información electrónica, resulta imprescindible profundizar en estudios de uso y de consumo de este tipo de información. Así el objeto de esta comunicación es evaluar el uso de cada título de revista electrónica con el propósito de rentabilizar los recursos económicos disponibles. Se realiza un análisis del coste por uso de las revistas electrónicas suscritas por la Universidad de Salamanca en el año 2009, relacionando las estadísticas de uso con los precios de las suscripciones. Los datos analizados corresponden a los informes de uso de las descargas realizadas en diez plataformas de revistas electrónicas: Emerald, JSTOR, IEEE, Wiley, Ebsco, Springer, Science-Direct., IOP, OVID y SWETS, se trata de establecer un indicador que nos permita conocer el coste de la suscripción dividido por el número de artículos consultados por los usuarios. Como base para el tratamiento y homogeneización de los datos estadísticos se ha utilizado una nueva herramienta: SwetsWise Selection Support que ha permitido integrar automáticamente las estadísticas de uso de las distintas plataformas y combinarlas con la información de precios. Los datos obtenidos deben servir para responder a este tipo de preguntas: ¿la colección que tenemos es la que necesitamos?, ¿es rentable a nivel económico y académico?, y además ayudar a la toma de decisiones en cuanto a la promoción de recursos y redistribución de presupuestos.
El análisis del paisaje urbano a través del dibujo
(Universitat Politècnica de València, 2012-03-04) Agustin Hernandez, Luis; Fernández Morales, Angélica; Peinado Checa, Zaira Joanna
La ponencia se centra en el dibujo como una herramienta de investigación, y plantea su papel fundamental en el análisis del territorio y la ciudad. Éste radica en su carácter instrumental y transdisciplinar, capaz de contemplar información procedente de los ámbitos geográfico, histórico, de planeamiento, etc. En primer lugar se definen las acciones posibles a desarrollar en un análisis basado en el dibujo. A continuación, abordamos los criterios gráficos empleados a lo largo de la historia y en la actualidad, así como la repercusión del uso de las herramientas digitales como el SIG. Por último, se contempla la representación de la edificación dentro de un análisis urbanístico, tomando como referencia el trabajo de investigación desarrollado en la Universidad de Zaragoza dentro del Grupo "Paisajes urbanos y proyecto contemporáneo".
Analysis and experiments for form finding of the SCST structures
(Editorial Universitat Politècnica de València, 2010-02-18T10:46:48Z) DOH, Jeung-Hwan; KIM, Jin-Woo; PARK, Moon-Ho
This paper is focused on the form finding of three kinds of SCST structures that are constructed with bolt type joint by gusset plate, bolt type joint, and ball type (Mero type) joint by means of cable-tensioning. The cable-tensioning method for SCST structure is a innovative, fast, and economical construction method in the special construction site or field condition, the cable-tensioning is performed with the strand in the bottom chords of space structures. In this paper, the unit shape of test models consist of uniform pyramids, from the planar structures on the ground, the space structures are shaped and erected into its final curved space structures by cable-tensioning. The cable-tensioning is applied along the diagonal direction, the circumference line direction, or the middle line direction of the each SCST structures. The feasibility of the proposed cable-tensioning technique and the reliability of the established geometric model were confirmed with finite element analysis and experiments for a small-scale test models. Through the experiments in the three types of SCST structures, within the yield limit of the members, a planar layout can be deformed to desired space shape by means of cable-tensioning. As a results, the proposed cabletensioning technique could be applied the form finding of the various SCST structures, so we can know the behaviour characteristic of the joint for each types in form finding for practical design purposes. For a special site condition of construction field, this cabletensioning technique should be an economic and reasonable construction method compare to conventional construction method including the heavy crane and scaffold.
The analysis of load relieving system using sliding cable element
(Editorial Universitat Politècnica de València, 2009-12-15T12:52:05Z) WU, Y. J.; CHEN, Z. H.
A new structural concept load relieving system is introduced which replaces unaffordable strain by reasonable deformation. A new kind of FEM element cable sliding element is also refer to. Its elementary presentation is given, which has arbitrary number of sliding nodes and satisfies uniform strain assumption. A typical load relieving system model is established applying the sliding cable element and studied under 2 representative load cases. As the results of analysis are reasonable, the correctness and validity of sliding cable element and its application in load relieving system can be proved. Furthermore, the strategy of simulating distributing load by applying concentrated forces on separate nodes of sliding cable element is proved feasible.
Analysis of moisture state of recycled coarse aggregate and its influence on compression strength of the concrete
(Editorial Universitat Politècnica de València, 2009-12-15T13:07:46Z) Pelufo Carbonell, María José; Domingo Cabo, Alberto; Ulloa Mayorga, Vivian Andrea; Vergara Acuña, Needy Nayiv; Dpto. de Ingeniería de la Construcción y de Proyectos de Ingeniería Civil; Escuela Técnica Superior de Ingeniería de Caminos, Canales y Puertos
This article analyzes the impact of the moisture level of recycled coarse aggregate additions to concrete on its compression strength, with the goal of finding a logical development process that can be reproduced at an industrial level and provide acceptable results for concrete production. This study takes into account the reality in the process of the production of concrete; while many authors suggest the use of recycled coarse aggregates in a saturated state to ensure the desired ratio water to cement in the concrete, in reality, the aggregates are introduced unsaturated. The main objective of this study is to observe and analyze the behaviour of recycled coarse aggregate in concrete, so that it is not stigmatized by the extra work involved in its use. The concrete was produced using three states of the recycled coarse aggregates. In the first one, the aggregates were added in their natural state, taking into account the total water in the dosage; in the second one, aggregates were added after being submerged in water for 10 minutes and drained for 10 minutes; and in the last one, the aggregates were added in their natural state, taking into account its absorption when adding the water. In order to evaluate the recycled coarse aggregates¿ resistance to compression at 28 days, four percentages of replacement of the recycled coarse aggregates, 0%, 20%, 50% and 100% were established among the concretes studied. The study finds that to define the resistance of a concrete, the effective ratio of water to cement plays a very important role; basically, the high absorption of recycled aggregates directly affects the quality of the concrete. The results showed that the values of compressive strength increased as the replacement percentage of the recycled coarse aggregates increased when the aggregates were added in their natural state, not considering their absorption in the mixed water. The opposite result was obtained when the aggregates were added in saturated state, reflecting a significant decrease in the resistance of the concrete as the replacement percentage of recycled coarse aggregates increased.
Analysis of Normal Lines for Structural Grids
(Editorial Universitat Politècnica de València, 2010-01-27T13:28:17Z) KAMERLING, Wim M. W.
For free-forms the structural grid affects the design of the envelope as well as the design of the structure. Due to the complex geometry of the surface the directions of the normal lines will vary. The diversity of the directions of the normal lines affects the design of the envelope and structure, especially in case the surface is connected directly, without secondary structure, to the members of the structural frame and the structural members have to be curved and twisted. Comparing several structural grids shows the effect of the grid for the directions of the normal lines and the design of the structural elements.
An analytical model for Tensairity girders
(Editorial Universitat Politècnica de València, 2009-12-14T11:32:56Z) LUCHSINGER, Rolf H.; TEUTSCH, Uwe
An analytical model for the deflection of a symmetric, spindle shaped Tensairity girder under homogenous load is proposed which can be solved analytically. The results are compared to FEM predictions for a specific Tensairity girder. Further simplifications of the analytical solution lead to a simple relation for the deflection of the Tensairity girder, which reveals the importance of the elasticity of the chords relative to the air pressure in the inflated hull. Such simple models are crucial to understand the basic principles of Tensairity and provide the engineer with easy rules to estimate the load-deflection behaviour of this new light weight structure.
The application of folded plate principles on spatial structures with regular, irregular and free-form geometries
(Editorial Universitat Politècnica de València, 2009-12-22T08:21:40Z) TRAUTZ, Martin; HERKRATH, Ralf
The two main folding plate principles of pointed folding plates forming an facet texture and longitudinal folding plates forming the typical fold texture imply different fields of application in architecture and structural engineering. This Paper presents a method of developing the folding plate principles on spatial structures also with irregular and freeform geometries. Hereby algorithms of triangulation, originally applied in finite elements analysis, are used for discretisation and form-finding of the textures of folded plate shells
Application of pushover analysis in estimating seismic demands for large-span spatial structure
(Editorial Universitat Politècnica de València, 2010-02-18T10:45:09Z) ZHANG, Weijin; QIAN, Jiaru
Pushover analysis has been widely adopted in the seismic analysis of low- and medium-rise structures. It needs to be studied whether it is accurate for large-span spatial structure. In this paper, pushover analysis of a large-span spatial structure, Beijing A380 hangar structure at Capital International Airport is introduced. The modal load pattern is adopted to perform pushover analysis for the hangar structure. The pushover analysis results are compared with nonlinear response history analysis results. It is concluded that pushover analysis is accurate enough for large-span spatial structure, provided the modal participating mass ratio is larger than about 0.65.

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