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  • Deterministic and probabilistic earthquake scenarios for the seismic risk analysis of URM buildings

     Avila Haro, Jorge Arturo; Gonzalez Drigo, Jose Ramon; Vargas Alzate, Yeudy Felipe; Pujades Beneit, Luis Gonzaga; Barbat Barbat, Horia Alejandro
    Key engineering materials
    Date of publication: 2013-05-02
    Journal article

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    Barcelona, as well as a large number of cities in the Mediterranean basin, has a housing stock composed of a large number of unreinforced brick masonry buildings. Motivated by different factors, the enlargement of the city (Eixample in Catalan) was held from the second half of the 19th century and the beginning of the 20th, a period in which a large number of buildings of this type were built, many of which are still used as dwellings. Although the buildings were built individually, some of them are linked to adjacent buildings by the side walls. This feature leads to the analysis of the buildings as isolated structures and also as an aggregate. Barcelona is located in a seismic region of low to moderate hazard, with macroseismic intensity between the grades VI and VII of the European macroseismic scale EMS'98. Based on the deterministic and probabilistic response spectra for the different types of soils present in Barcelona obtained in the work of Irizarry (2004), the seismic risk of four individual buildings and an aggregate is evaluated. The buildings are modeled and analyzed using the TREMURI program and MATLAB routines under the guidance of RISK-UE project.

  • Análisis estructural estático y dinámico probabilista de edificios de hormigón armado. Aspectos metodológicos y aplicaciones a la evaluación del daño.  Open access

     Vargas Alzate, Yeudy Felipe
    Defense's date: 2013-07-09
    Universitat Politècnica de Catalunya
    Theses

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    Esta tesis propone una metodología de evaluación del daño sísmico basada en el método del espectro de capacidad pero con un enfoque probabilista que se apoya en simulaciones Monte Carlo. Así la acción sísmica, la estructura y el daño esperado se consideran y se analizan como variables aleatorias. La metodología, que se valida mediante el análisis dinámico incremental, es una nueva, robusta y potente herramienta de análisis de riesgo tanto a nivel de edificios individuales como a nivel urbano y regional. La validación mediante el análisis dinámico, de hecho, ha supuesto crear también una metodología probabilista basada en el análisis dinámico incremental. El daño esperado puede obtenerse para cualquier intervalo de confianza permitiendo así, a los gestores de la protección civil la elección de los niveles prioritarios o de interés. Como el análisis dinámico incremental requiere acelerogramas, se ha optado por usar registros de terremotos y se ha diseñado una técnica que, para una determinada base de datos, permite optimizar, minimizando la dispersión, el número de acelerogramas compatibles con un determinado espectro de respuesta; de esta forma la incertidumbre en la acción sísmica se considera de una manera adecuada. Aunque a efectos metodológicos, se ha estimado suficiente y adecuado considerar como variables aleatorias gaussianas sólo las propiedades resistentes del hormigón y el acero, con todo se ha introducido también una nueva e interesante forma de incorporar la variabilidad espacial de la resistencia de vigas y columnas. Los desarrollos metodológicos se ilustran con numerosos casos de estudio de edificios existentes y bien documentados. En particular, se han estudiado los edificios de hormigón armado con forjados reticulares, clasificados en altos, de altura mediana y bajos. Este estudio se ha realizado considerando acciones sísmicas compatibles con los espectros previstos en el eurocódigo EC8 para terremotos tipo 1 y tipo 2 y para suelos A, B, C, D y E. La aplicación del método a edificios irregulares ha confirmado la insuficiencia de modelos 2D en estructuras asimétricas. Así, el método probabilista se ha aplicado a dos edificios de especial importancia para escenarios sísmicos de interés. El primero es el hospital de Vielha, para la acción sísmica con un periodo de retorno de 475 años; el segundo es un edificio del Barrio de San Fernando en Lorca, que fue severamente dañado por el terremoto del mes de mayo de 2011. En este segundo caso la acción sísmica se ha definido de forma determinista mediante las dos componentes horizontales de aceleración registradas en la ciudad. En los análisis 3D se ha incorporado el efecto de direccionalidad, concluyendo que edificios del mismo tipo situados en un mismo lugar pueden sufrir daños significativamente distintos dependiendo sólo de su orientación azimutal. Los resultados obtenidos en el caso de Lorca son compatibles con los daños observados lo que contribuye a validar el método probabilista y los desarrollos implementados en esta tesis.

    This dissertation proposes a methodology for seismic damage assessment based on the capacity spectrum method but with a probabilistic approach which is supported on Monte Carlo simulation. The seismic action, the structure and the expected damage are considered and analyzed as random variables. The method, which is validated through incremental dynamic analysis, is a new, robust and powerful tool for risk analysis that can be applied to individual buildings, but also at urban and regional scales. In fact, the validation through dynamic analyses has involved creating also a probabilistic method for damage assessment, based on incremental dynamic analysis. The expected damage can be obtained for any confidence interval thus allowing the civil protection managers choosing the levels of priority or interest. As incremental dynamic analyses require accelerograms, the use of earthquake records has been preferred and it has been developed a specific technique that, for a given database, minimizes the dispersion and optimizes the number of accelerograms compatible with a given response spectrum; in this way, the uncertainties in the seismic action are considered in an appropriate manner. Although for methodological purposes it was estimated sufficient and adequate to consider only the strength properties of concrete and steel as Gaussian random variables, yet a new and interesting way to incorporate the spatial variability of the strength of beams and columns has been also proposed. The methodological developments are illustrated with numerous case studies of existing and well documented buildings. Specifically, reinforced concrete buildings with waffle slabs, classified as low-rise, mid-rise and high-rise, have been studied. This study has been conducted considering seismic actions compatible with the response spectra foreseen in the Eurocode EC8 for type 1 and type 2 earthquakes and soil classes A, B, C, D and E. The application of the method to irregular buildings confirmed the insufficiency of 2D models for asymmetric structures. Thus, the probabilistic method has been applied to two buildings of special importance for seismic scenarios of interest. The first one is the hospital of Vielha considering the seismic action with a return period of 475 years; the second one is a building located in the neighborhood of San Fernando in Lorca, which was severely damaged by the earthquake of May 2011. In this second case the seismic action has been defined deterministically by means of the two horizontal accelerograms recorded in the city. In 3D analyses the directionality effect is considered, concluding that buildings of the same type located in the same place can suffer significantly different damages depending only of their azimuthal angle. The results obtained in the case of Lorca are compatible with the observed damage. This fact supports the validity of the probabilistic method as well as that of the developments implemented in this thesis.

  • Seismic performance of unreinforced masonry buildings: application to Barcelona, Spain

     Avila Haro, Jorge Arturo; Gonzalez Drigo, Jose Ramon; Vargas Alzate, Yeudy Felipe; Pujades Beneit, Luis Gonzaga; Barbat Barbat, Horia Alejandro; Cattari, Serena
    World Conference on Earthquake Engineering
    Presentation's date: 2012-09-24
    Presentation of work at congresses

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  • Deterministic and probabilistic earthquake scenarios for the seismic risk analysis of URM buildings

     Avila Haro, Jorge Arturo; Gonzalez Drigo, Jose Ramon; Vargas Alzate, Yeudy Felipe; Pujades Beneit, Luis Gonzaga; Barbat Barbat, Horia Alejandro
    International Conference on Fracture and Damage Mechanics
    Presentation's date: 2012-09-19
    Presentation of work at congresses

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  • Ground-penetrating radar resolution in cultural heritage applications

     Perez Gracia, Maria de La Vega; Gonzalez Drigo, Jose Ramon; Sala, Roger
    Near surface geophysics
    Date of publication: 2012-02-01
    Journal article

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  • UN NUEVO ENFOQUE DE LOS PRECURSORES SÍSMICOS: MONITORIZACIÓN DE LA INTERACCIÓN FRÁGIL-DÚCTIL DE LA LITOSFERA Y SU RELACIÓN CON GRANDES TERREMOTOS  Open access

     Tarela Alonso, Ester
    Defense's date: 2012-06-22
    Department of Geotechnical Engineering and Geo-Sciences, Universitat Politècnica de Catalunya
    Theses

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    The main goal of this thesis is to test the brittle-ductile (BD) interaction hypothesis of the lithosphere. The model uses the correlation of two parameters, the seismicity characterizing the brittle part and the attenuation representing the ductile part. It assumes the coupling of both parts and therefore the correlation between the time series of the parameters during the normal part of the stress loading cycle. A few years before the occurrence of a major earthquake, the brittle part of the system suffers a stress overload, so it cannot maintain the normal loading processes through the brittle-ductile transition zone, provoking the decoupling of the parts and breaking the previous correlation between the analyzed time series. First, a worldwide analysis of seismicity is developed, focusing after in three regions, Colombia, Taiwan and the Iberian Peninsula. The seismicity data for the global analysis are obtained from the Centennial Catalog, while local catalogs are used for the regional study. Then, the BD hypothesis is tested in three seismic stations in Colombia and five in Taiwan; for that purpose, a selection of almost 4000 waveforms are effectively used from a total of almost 48000 of the study areas, for the coda Q quality factor analysis. The global and regional seismicity analysis allows the detection of space-time evolution trends with no easy explanation and that are attributed to external manifestations of the Earth¿s interior dynamic processes in the mantle. The detailed seismicity analysis in the 8 studied stations characterizes the brittle part. The waveforms in each station are used to determine the time series of coda Q in a time window of around 14 years. First, its space-time variation and depth dependence are studied, finding significant changes that correlate with local geotectonic structures. Besides, specific time series that characterize the ductile part are obtained. The correlation analysis and the one of the time variation of the central correlation coefficient have allowed evaluating the BD model. A new technique that allows the construction of time series of this coefficient is proposed, in a way that following and detecting the correlation/uncorrelation of the seismicity and Q time series can be done continuously. Therefore, calm and enhanced activity periods can be firmly established in the BD theory. By applying the technique to different geotectonic locations we find cases in which the behavior obeys the theory, whilst for others the validity is unclear. In the former, high values of the central correlation coefficient, above 0.6, are observed during calm periods; this value decreases drastically some time before the occurrence of a major earthquake. In the latter, the correlation is found to be, in most cases, permanently low, what can be attributed to a inexistent or poorly developed BD interaction zone, since, in most cases, these regions are ruled by complex geotectonic structures and a relatively high frequency of major earthquakes.

  • Nuevas Avances de la Geofísica y la Ingeniería aplicados a la evaluación del riesgo sísmico

     Lana Pons, Francisco Javier; Caselles Magallon, Jose Oriol; Perez Gracia, Maria de La Vega; Gonzalez Drigo, Jose Ramon; Martínez Santafé, Maria Dolors; Lopez Almansa, Francisco; Serra De Larrocha, Carina; Canas Torres, Jose Antonio; Pujades Beneit, Luis Gonzaga
    Participation in a competitive project

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  • Seismic performance of a block of buildings representative of the typical construction in the Eixample district in Barcelona (Spain)

     Pujades Beneit, Luis Gonzaga; Barbat Barbat, Horia Alejandro; Gonzalez Drigo, Jose Ramon; Avila Haro, Jorge Arturo; Lagomarsino, S.
    Bulletin of earthquake engineering
    Date of publication: 2012-02
    Journal article

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  • Modelización de un edificio de mampostería no reforzada característico del distrito del eixample de Barcelona, España

     Avila Haro, Jorge Arturo; Gonzalez Drigo, Jose Ramon; Pujades Beneit, Luis Gonzaga; Barbat Barbat, Horia Alejandro
    Congreso Nacional de Ingeniería Sísmica
    Presentation's date: 2011-05-18
    Presentation of work at congresses

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  • Characterization of a Romanesque Bridge in Galicia (Spain)

     Perez Gracia, Maria de La Vega; Di Capua, Daniel; Caselles Magallon, Jose Oriol; Rial, Fernando; Lorenzo, Henrique; Gonzalez Drigo, Jose Ramon; Armesto, Julia
    International journal of architectural heritage
    Date of publication: 2011-04-08
    Journal article

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  • Cálculo de elementos estructurales

     Sanchez Molina, David; Gonzalez Drigo, Jose Ramon
    Date of publication: 2011-09
    Book

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  • Seismic vulnerability of building aggregates in Barcelona

     Gonzalez Drigo, Jose Ramon; Avila Haro, Jorge Arturo; Pujades Beneit, Luis Gonzaga; Barbat Barbat, Horia Alejandro
    European Conference on Earthquake Engineering
    Presentation's date: 2010-09-03
    Presentation of work at congresses

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    Almost half of the housing buildings of Barcelona were built before 1940. In the Eixample district, approximately the 65% of the buildings fit the main features of a building design based on unreinforced masonry (URM) without any consideration of the seismic action. The buildings of the Eixample district are not isolated, quite the opposite, they are built as a part of a squared aggregate (113,3m per 113,3m) which includes approximately 22 buildings. Since 1960, the major part of the demolished URM buildings has been substituted by reinforced concrete (RC) buildings. As a consequence of this substitution, we expect a change in the seismic vulnerability of the buildings aggregate. In order to evaluate changes in the dynamic behavior of an aggregate, we performed different pushover analysis using the TreMuri software. A comparison of results corresponding to aggregates of URM-buildings and aggregates including RC-buildings is presented.

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    GPR resolution in cultural heritage applications  Open access

     Perez Gracia, Maria de La Vega; Di Capua, Daniel; Gonzalez Drigo, Jose Ramon; Caselles Magallon, Jose Oriol; Pujades Beneit, Luis Gonzaga; Salinas Naval, Victor
    International Conference on Ground Penetrating Radar
    Presentation's date: 2010-06-21
    Presentation of work at congresses

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    The non-destructive study of historical buildings, archaeological sites and other Cultural Heritage structures requires high resolution methodologies and a good knowledge of the potential of the different methods. Laboratory measurements provide valuable information about the ability to detect different targets and to determine structural problems, but these data must be compared to the results obtained in real and complex structures. In this work, we present experimental GPR measurements made in order to determine the spatial resolution under laboratory conditions. These results were compared to the data obtained in different GPR surveys applied to Cultural Heritage. The information obtained in drillings, in visual inspections and in old documentation about the historical buildings and archaeological sites is used to determine the resolution in each case.

  • GPR Resolution - Lab Data Compared to NDT Evaluations of Structures

     Perez Gracia, Maria de La Vega; Pujades Beneit, Luis Gonzaga; Di Capua, Daniel; Gonzalez Drigo, Jose Ramon; Caselles Magallon, Jose Oriol; Salinas Naval, Victor
    EAGE Conference & Exhibition incorporating SPE EUROPEC 2010
    Presentation's date: 2010-06-15
    Presentation of work at congresses

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  • STRUCTURAL ANALYSIS OF MASONRY WALLS USING DIGITAL PHOTOGRAPHY ASSISTED MESH GENERATION

     Di Capua, Daniel; Perez Gracia, Maria de La Vega; Gonzalez Drigo, Jose Ramon
    Revista internacional de métodos numéricos para cálculo y diseño en ingeniería
    Date of publication: 2010
    Journal article

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  • Vulnerabilidad sísmica de edificios de acero  Open access

     BERMÚDEZ MEJÍA, CARLOS ALBERTO
    Defense's date: 2010-10-08
    Department of Geotechnical Engineering and Geo-Sciences, Universitat Politècnica de Catalunya
    Theses

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    En esta tesis se aplican los métodos estático no lineal y dinámico no lineal en el edificio prototipo y en otros seis representativos de las principales subclases de las estructuras de acero. Como resultado se expresan los umbrales de los estados de daño en función de los puntos característicos del espectro de capacidad bilineal. Se presenta una nueva propuesta de clasificación de las estructuras de acero de acuerdo con la EMS-98. Se cierra la investigación con un estudio estocástico detallado que considera la variabilidad probabilística de la acción sísmica, de las cargas verticales y de las propiedades físicas y mecánicas de los miembros estructurales. Se calcula la probabilidad de excedencia de los principales estados límite y de los umbrales de los distintos estados de daño. Como resultado se identifican los estados límite que con más probabilidad serán alcanzados y se recomiendan algunos factores de seguridad adicionales.

    In this thesis nonlinear static and dynamic methods are applied to the prototype building, and to six more buildings, representing main subclasses of steel structures. As a result, the thresholds of damage state are expressed in function of the main points of the bilinear capacity spectrum. A new proposal of classification of steel structures, according with EMS-98, is presented. The last part of this thesis is a detailed stochastic study that considers probabilistic variability of seismic action, vertical loads and physical and mechanics properties of the structural members. Exceedance probabilities for the main limit states and thresholds of damage states are calculate. As a result the limit states most likely will be exceeded are identified. Finally some additional security factors are recommended.

  • Laboratory characterization of a GPR antenna for high-resolution testing: radiation pattern and vertical resolution

     Perez Gracia, Maria de La Vega; Di Capua, Daniel; Gonzalez Drigo, Jose Ramon; Pujades Beneit, Luis Gonzaga
    NDT and E international
    Date of publication: 2009-06
    Journal article

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    High-resolution ground-penetrating radar (GPR) evaluations of structures are usually carried out using antennas with high nominal centre frequencies (between 1 and 2GHz). A comprehensive characterization of such an antenna would make it possible to determine the capabilities of a system and obtain accurate data interpretations. This paper describes the experimental determination of the radiation pattern of a commercial 1.6 GHz antenna, which forms part of a comprehensive experimental characterization. Radiation patterns are closely related to spatial resolution, so the horizontal and vertical resolutions are evaluated first. The footprint of the antenna is then measured in air using simple devices at different distances. The final result is the approximate spatial radiation pattern of the emitted energy, measured in air. Finally, these measurements are also taken in sand to obtain the radiation pattern and footprint of the antenna in this medium.

  • Laboratory characterization of a GPR antenna for high resolution testing: aspects related to the recorded signal

     Perez Gracia, Maria de La Vega; Gonzalez Drigo, Jose Ramon; Pujades Beneit, Luis Gonzaga
    5th International Workshop on Advanced Ground Penetrating Radar
    Presentation of work at congresses

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  • CONTRIBUCIONES SISMOLÓGICAS, GEOFISICAS Y DE INGENIERIA A LA PREDICCION Y PREVENCION DEL RIESGO SISMICO

     Lopez Almansa, Francisco; Lana Pons, Francisco Javier; Martínez Santafé, Maria Dolors; Gonzalez Drigo, Jose Ramon; Serra De Larrocha, Carina; Osorio Gomez, Raul; Clapes Boixader, Jaime; Lantada Zarzosa, Nieves; Caselles Magallon, Jose Oriol; Perez Gracia, Maria de La Vega; Canas Torres, Jose Antonio; Pujades Beneit, Luis Gonzaga
    Participation in a competitive project

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  • SISTEMA DE INFORMACION SISMICA DE LOS PIRINEOS

     Gonzalez Drigo, Jose Ramon; Barbat Barbat, Horia Alejandro; Lantada Zarzosa, Nieves; Perez Gracia, Maria de La Vega; Pujades Beneit, Luis Gonzaga
    Participation in a competitive project

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  • GEOFÍSICAI ENGINYERIA SÍSMICA

     Lopez Almansa, Francisco; Martínez Santafé, Maria Dolors; Lana Pons, Francisco Javier; Serra De Larrocha, Carina; Pujades Beneit, Luis Gonzaga; Gonzalez Drigo, Jose Ramon; Osorio Gomez, Raul; Clapes Boixader, Jaime; Caselles Magallon, Jose Oriol; Perez Gracia, Maria de La Vega; Canas Torres, Jose Antonio
    Participation in a competitive project

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  • GPR resolution in NDT studies of structural elements: experimental methodology and examples

     Perez Gracia, Maria de La Vega; Di Capua, Daniel; Gonzalez Drigo, Jose Ramon; Pujades Beneit, Luis Gonzaga
    International Symposium on Nondestructive Testing in Civil Engineering
    Presentation's date: 2009-07
    Presentation of work at congresses

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  • GPR survey to study the restoration of a Roman monument

     Pérez-Gracia, V; Perez Gracia, Maria de La Vega; García, F; Pujades Beneit, Luis Gonzaga; Gonzalez Drigo, Jose Ramon; Di Capua, Daniel
    Journal of cultural heritage
    Date of publication: 2008-01
    Journal article

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  • GPR survey applied to modernista buildings in Barcelona: the cultural heritage of the College of Industrial Engineering

     Gonzalez Drigo, Jose Ramon; Pérez-Gracia, V; Perez Gracia, Maria de La Vega; Di Capua, Daniel; Pujades Beneit, Luis Gonzaga
    Journal of cultural heritage
    Date of publication: 2008-05
    Journal article

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  • Horizontal resolution in a non-destructive shallow GPR survey: an experimental evaluation

     Pérez-Gracia, V; Perez Gracia, Maria de La Vega; Gonzalez Drigo, Jose Ramon; Di Capua, Daniel
    NDT and E international
    Date of publication: 2008-09
    Journal article

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  • Analysis of the attenuation in soils and water content in remote sensing in-situ surveying

     Gonzalez Drigo, Jose Ramon
    Remote Sensing of Clouds and the Atmosphere XII
    Presentation's date: 2007-09-17
    Presentation of work at congresses

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  • Analysis of the attenuation in soils and water content in remote sensing in-situ surveying

     Pérez-Gracia, V; Perez Gracia, Maria de La Vega; Pujades Beneit, Luis Gonzaga; Gonzalez Drigo, Jose Ramon; Di Capua, Daniel
    Remote Sensing of Clouds and the Atmosphere XII
    Presentation of work at congresses

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  • Experimental analyisis of the resolution in shallow GPR survey

     Pérez-Gracia, V; Perez Gracia, Maria de La Vega; Gonzalez Drigo, Jose Ramon; Di Capua, Daniel; Pujades Beneit, Luis Gonzaga
    Remote Sensing of Clouds and the Atmosphere XII
    Presentation of work at congresses

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  • Characteristics of the GPR field pattern antennas

     Pérez-Gracia, V; Perez Gracia, Maria de La Vega; Gonzalez Drigo, Jose Ramon; Di Capua, Daniel; Pujades Beneit, Luis Gonzaga
    Remote Sensing of Clouds and the Atmosphere XII
    Presentation of work at congresses

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  • Aplicación de tecnología GPR para la caracterización del contenido de agua en medios porosos. Una propuesta para la evaluación de fugas de agua en instalaciones industriales

     Pérez-Gracia, V; Perez Gracia, Maria de La Vega; Gonzalez Drigo, Jose Ramon; Di Capua, Daniel
    Sociedad Nuclear Española. Reunión
    Presentation's date: 2007-09-26
    Presentation of work at congresses

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  • Characteristics of the GPR field pattern antennas

     Gonzalez Drigo, Jose Ramon
    Remote Sensing of Clouds and the Atmosphere XII
    Presentation's date: 2007-09-17
    Presentation of work at congresses

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  • GPR como técnica para la caracterización de armaduras en estructuras de hormigón armado

     Gonzalez Drigo, Jose Ramon; Di Capua, Daniel; Pérez-Gracia, V; Perez Gracia, Maria de La Vega
    Sociedad Nuclear Española. Reunión
    Presentation's date: 2007-09-26
    Presentation of work at congresses

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  • Experimental analysis of the resolution in shallow GPR survey

     Gonzalez Drigo, Jose Ramon
    Remote Sensing of Clouds and the Atmosphere XII
    Presentation's date: 2007-09-17
    Presentation of work at congresses

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  • Digital photogrammetry, GPR and computational analysis of structural damages in a mediaeval bridge

     Arias, P; Armesto, J; Di Capua, Daniel; Gonzalez Drigo, Jose Ramon; Lorenzo, H; Perez Gracia, Maria de La Vega
    Engineering failure analysis
    Date of publication: 2007-02
    Journal article

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    Traditional architectonic heritage elements are fragile and irreplaceable resources, signs of the ancient ways of life and the history of the modern societies, and essential valuable elements of the own landscape of a region. Accurate updated documentation might be the basis for any conservation or restoration intervention over architectonic heritage in order to ensure the conservation in its original appearance and in a collapse risk-free state, with the minimum intervention. This paper shows a multidisciplinary approach to heritage documentation involving close range photogrammetry and ground penetrating radar techniques, as well as the development of finite elements based structural models. Specifically this study is focused on the documentation of a mediaeval bridge concerning the geometric shape, the building material and the current damages and its causes. The usefulness of close range photogrammetry techniques in the accurate 3D modelling, cracks detection and mapping and exterior material characterization is analyzed. Further, a non-destructive test through GPR is employed for the interior material and zones description. For both techniques, the methodology followed for data collection and data processing aimed at minimisation of time consuming and optimisation of results is described in detail. Advantages and limitations of these techniques are displayed and the accuracy of the obtained results is also estimated. Resulting information related to the whole bridge geometry is taken as basis to develop a numerical analysis using the finite elements methods (FEM). Linear finite analysis provides useful information for diagnosis although non-linear methods should be used when the properties and geometry of the internal and external elements are well known. Photogrammetry provides the exact geometry needed to perform the FEM pre-process. Radar data provide approximate information about the different internal zones of the bridge. Finally, the FEM analysis leads to obtain a stress distribution compatible with the detected damages, allowing identifying its possible causes. Close range photogrammetry, ground penetrating radar techniques and the FEM analysis are proposed to perform a complete survey of the stability of the bridge and its accurate geometry.

  • GPR como técnica para la caracterización de armaduras en estructuras de hormigón armado

     Gonzalez Drigo, Jose Ramon; Di Capua, Daniel; Perez Gracia, Maria de La Vega; Pérez-Gracia, Vega
    Nuclear España
    Date of publication: 2007-09
    Journal article

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  • Aplicación de tecnología GPR para la caracterización del contenido de agua en medios porosos. Una propuesta para la evaluación de fugas de agua en instalaciones industriales

     Perez Gracia, Maria de La Vega; Pérez-Gracia, Vega; Gonzalez Drigo, Jose Ramon; Di Capua, Daniel
    Nuclear España
    Date of publication: 2007-09
    Journal article

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  • Exploración y análisis estructural no destructivo mediante GPR. Una aplicación al patrimonio industrial: la Escuela Industrial de Barcelona

     Pérez-Gracia, V; Perez Gracia, Maria de La Vega; Gonzalez Drigo, Jose Ramon; Pujades Beneit, Luis Gonzaga
    I Congreso Internacional de Patrimonio e Historia de la Ingeniería
    Presentation of work at congresses

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  • NDT, geometric and computational analysis of damages in ancient bridge.

     Gonzalez Drigo, Jose Ramon
    ICEFA II. Second International Conference on Engineering Failure Analysis.
    Presentation's date: 2006-09-12
    Presentation of work at congresses

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  • Radar de subsuelo. Evaluación para aplicaciones en patrimonio industrial y en arqueología

     Perez Gracia, Maria de La Vega; Gonzalez Drigo, Jose Ramon; Pujades Beneit, Luis Gonzaga; Di Capua, Daniel
    I Congreso Internacional de Patrimonio e Historia de la Ingeniería
    Presentation of work at congresses

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  • GPR antennae characterization to improve the data interpretation

     Pérez-Gracia, V; Perez Gracia, Maria de La Vega; Pujades Beneit, Luis Gonzaga; Canas Torres, Jose Antonio; Gonzalez Drigo, Jose Ramon
    EUROCow-2006. Internacional Calibration Orientation Workshop
    Presentation of work at congresses

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  • Da Vinci i la mecànica del segle XXI

     Napoles Alberro, Amelia Emelina; Gonzalez Drigo, Jose Ramon
    Informatiu theknos - Col·legi d'Enginyers Tècnics Industrials de Barcelona
    Date of publication: 2006-06
    Journal article

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  • Un mètode de prospecció no destructiva aplicable a l'obra civil i a les construccions industrials. El radar de subsòl

     Perez Gracia, Maria de La Vega; Pérez-Gracia, Vega; Gonzalez Drigo, Jose Ramon
    Informatiu theknos - Col·legi d'Enginyers Tècnics Industrials de Barcelona
    Date of publication: 2006-02
    Journal article

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  • El disseny sismoresistent convencional i el sistemes de protecció sísmica. Defensa sísmica

     Gonzalez Drigo, Jose Ramon; Perez Gracia, Maria de La Vega; Pérez-Gracia, Vega
    Informatiu theknos - Col·legi d'Enginyers Tècnics Industrials de Barcelona
    Date of publication: 2006-03
    Journal article

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  • Anàlisi d'estructures de formigó armat exposades al foc

     Di Capua, Daniel; Gonzalez Drigo, Jose Ramon; Perez Gracia, Maria de La Vega; Pérez-Gracia, Vega
    Informatiu theknos - Col·legi d'Enginyers Tècnics Industrials de Barcelona
    Date of publication: 2006-04
    Journal article

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  • Càlcul de l'espessor mínim de les parets d'un reactor de policondensació

     Estrany Coda, Francisco; Oliver Pujol, Ramon; Gonzalez Drigo, Jose Ramon
    Theknos: publicació del Col·legi Oficial d'Enginyers Tècnics Industrials de Catalunya
    Date of publication: 2006-07
    Journal article

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  • Càlcul de l'espessor mínimde les parets d'un reactor de policondensació

     Gonzalez Drigo, Jose Ramon; Estrany Coda, Francisco; Oliver Pujol, Ramon
    Informatiu theknos - Col·legi d'Enginyers Tècnics Industrials de Barcelona
    Date of publication: 2006-07
    Journal article

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  • Estudio de los elementos estructurales de la EUETIB (Escuela Técncia Industrial de Barcelona) con radar de subsuelo

     Gonzalez Drigo, Jose Ramon
    XXX Reunión Bienal de la Real Sociedad Española de Física y 15º Encuentro Ibérico para la para la enseñanza de la física Ourense, 12-16 de septiembre de 2005
    Presentation's date: 2005-09-12
    Presentation of work at congresses

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  • Aplicabilidad en ciudades densas del método del cociente espectral para el cálculo de la respuesta de suelo

     Gonzalez Drigo, Jose Ramon
    XXX Reunión Bienal de la Real Sociedad Española de Física y 15º Encuentro Ibérico para la para la enseñanza de la física Ourense, 12-16 de septiembre de 2005
    Presentation's date: 2005-09-12
    Presentation of work at congresses

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  • Elasticidad y resistencia de materiales i. problemas.

     Sanchez Molina, David; Gonzalez Drigo, Jose Ramon
    Date of publication: 2005-10-31
    Book

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  • La actividad académica de la EUETIB

     Bargalló Perpiñà, Ramon; Gamiz Caro, Javier Francisco; Gonzalez Drigo, Jose Ramon; Sepulcre Sanchez, Francesc
    Debats d'arquitecturai i urbanisme
    Date of publication: 2004-05
    Journal article

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