Examinando por Materia "Structural analysis"
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Ítem Análisis estructural y tectonoestratigráfico de la línea sísmica SPAN-3800 entre las cuencas de Colombia y Guajira Offshore en la región del Caribe colombiano(Universidad EAFIT, 2021) Cepeda Posada, Juan Pablo; Redondo Toro, Laura; Beltrán Triviño, Alejandro Iván; Piraquive Bermúdez, AlejandroThe Guajira Offshore and Colombia basins are located at the boundary between the south of the Caribbean plate and the northwestern corner of the South America plate. The tectonic history of the area has been dominated by an oblique convergence between these two plates. The interactions between the plates from the Paleocene to the Recent have driving the major tectonostratigraphic and structural features of the area, generating accretion prisms and compression belts (Deformed Belt of the South Caribbean) along with major strike-slip elements of transtension and transpression. Taking this into account, the goal of this work was to perform a tectono-stratigraphic and structural analysis of the deformed sedimentary sequences in the northwestern of the Guajira Peninsula recorded in the SPAN 3800 seismic line. Four tectonic events were recognized from the interpretation of the seismic facies and reflector terminations, which show the accumulation trends of the sequences and the structures styles in the study area: 1) Extensional event from the Eocene to the Oligocene, 2) Transpression from the early Miocene to the Pliocene, 3) Transtension from the late Miocene period to the Pliocene and 4) Event of diapirism after the early Pliocene.Ítem Detection of structural damage and estimation of reliability using a multidimensional monitoring approach(SAGE PUBLICATIONS LTD, 2018-04-01) Ortiz J.O.; Betancur G.R.; Gómez J.; Castañeda L.F.; Zajsc G.; Gutiérrez-Carvajal R.E.; Universidad EAFIT. Departamento de Ingeniería Mecánica; Estudios en Mantenimiento (GEMI)Many structural elements are exposed to load conditions that are difficult to model during the design phase, such as environmental uncertainties, random impacts, and overloading, amongst others, thus increasing unprogrammed maintenance and reducing confidence in the reliability of the structure in question. One way to deal with this problem is to monitor the structural condition of the element. This approach requires supervising several signals coming from critical locations and then performing an accurate condition estimation of the element in question based on the data collected. This study implements a method to diagnose and evaluate the reliability of the bolster beam structure of the railway vehicle during a fatigue test. The results show that multidimensional monitoring not only diagnoses the element accurately but also results in correct estimation of reliability. © 2017, © IMechE 2017.Ítem Development of structural debris flow fragility curves (debris flow buildings resistance) using momentum flux rate as a hazard parameter(Elsevier B.V., 2018-05-18) Prieto, Jorge Alonso; Journeay, Murray; Acevedo A.B.; Arbelaez, Juan; Ulmi, Malaika; Prieto, Jorge Alonso; Journeay, Murray; Acevedo A.B.; Arbelaez, Juan; Ulmi, Malaika; Universidad EAFIT. Departamento de Ingeniería de Producción; Materiales de IngenieríaSocietal risks associated with debris flow hazards are significant and likely to escalate due to global population growth trends and the compounding effects of climate change. Quantitative risk assessment methods (QRA) provide a means of anticipating the likely impacts and consequences of settlement in areas susceptible to landslide activity and are increasingly being used to inform land use decisions that seek to increase disaster resilience through mitigation and/or adaptation. Current QRA methods for debris flow hazards are based primarily on empirical vulnerability functions that relate hazard intensity (depth, velocity, etc.) to expected levels of loss for a given asset of concern, i.e. most of current methods are dedicated to loss-intensity relations. Though grounded in observed cause-effect relationships, empirical vulnerability functions are not designed to predict the capacity of a building to withstand the physical impacts of a debris flow event, or the related uncertainties associated with modelling building performance as a function of variable debris flow parameters. This paper describes a methodology for developing functions that relate hazard intensity to probability of structural damage, i.e., fragility functions, rather than vulnerability functions, based on the combined hydrodynamic forces of a debris flow event (hazard level) and the inherent structural resistance of building typologies that are common in rural mountainous settings (building performance). Hazard level includes a hydrodynamic force variable (FDF), which accounts for the combined effects of debris flow depth and velocity, i.e. momentum flux (hv2), material density (?) and related flow characteristics including drag (Cd) and impact coefficient (Kd). Building performance is measured in terms of yield strength (Ay), ultimate lateral capacity (AU) and weight to breadth ratios (W/B) defined for a portfolio building types that are common in mountain settlements. Collectively, these model parameters are combined using probabilistic methods to produce building-specific fragility functions that describe the probability of reaching or exceeding successive thresholds of structural damage over a range of hazard intensity values, expressed in terms of momentum flux. Validation of the proposed fragility model is based on a comparison between model outputs and observed cause-effect relationships for recent debris flow events in South Korea and in Colombia. Debris flow impact momentum fluxes, capable of resulting in complete damage to unreinforced masonry buildings (URM) in those regions are estimated to be on the order of 24 m3/s2, consistent with field-based observations. Results of our study offer additional capabilities for assessing risks associated with urban growth and development in areas exposed to debris flow hazards. © 2018 Elsevier B.V.Ítem Development of structural debris flow fragility curves (debris flow buildings resistance) using momentum flux rate as a hazard parameter(Elsevier B.V., 2018-05-18) Prieto, Jorge Alonso; Journeay, Murray; Acevedo A.B.; Arbelaez, Juan; Ulmi, Malaika; Mecánica AplicadaSocietal risks associated with debris flow hazards are significant and likely to escalate due to global population growth trends and the compounding effects of climate change. Quantitative risk assessment methods (QRA) provide a means of anticipating the likely impacts and consequences of settlement in areas susceptible to landslide activity and are increasingly being used to inform land use decisions that seek to increase disaster resilience through mitigation and/or adaptation. Current QRA methods for debris flow hazards are based primarily on empirical vulnerability functions that relate hazard intensity (depth, velocity, etc.) to expected levels of loss for a given asset of concern, i.e. most of current methods are dedicated to loss-intensity relations. Though grounded in observed cause-effect relationships, empirical vulnerability functions are not designed to predict the capacity of a building to withstand the physical impacts of a debris flow event, or the related uncertainties associated with modelling building performance as a function of variable debris flow parameters. This paper describes a methodology for developing functions that relate hazard intensity to probability of structural damage, i.e., fragility functions, rather than vulnerability functions, based on the combined hydrodynamic forces of a debris flow event (hazard level) and the inherent structural resistance of building typologies that are common in rural mountainous settings (building performance). Hazard level includes a hydrodynamic force variable (FDF), which accounts for the combined effects of debris flow depth and velocity, i.e. momentum flux (hv2), material density (?) and related flow characteristics including drag (Cd) and impact coefficient (Kd). Building performance is measured in terms of yield strength (Ay), ultimate lateral capacity (AU) and weight to breadth ratios (W/B) defined for a portfolio building types that are common in mountain settlements. Collectively, these model parameters are combined using probabilistic methods to produce building-specific fragility functions that describe the probability of reaching or exceeding successive thresholds of structural damage over a range of hazard intensity values, expressed in terms of momentum flux. Validation of the proposed fragility model is based on a comparison between model outputs and observed cause-effect relationships for recent debris flow events in South Korea and in Colombia. Debris flow impact momentum fluxes, capable of resulting in complete damage to unreinforced masonry buildings (URM) in those regions are estimated to be on the order of 24 m3/s2, consistent with field-based observations. Results of our study offer additional capabilities for assessing risks associated with urban growth and development in areas exposed to debris flow hazards. © 2018 Elsevier B.V.Ítem Dinámica del conocimiento, caso Corporación Country Club Ejecutivos, área producción de alimentos.(Universidad Eafit, 2019) Rozo Agudelo, Francisco Javier; López Muriel, Sandra MaríaThe interest in knowledge has grown both in the organization and in the academy. This has motivated different types of institutions to implement knowledge management strategies, in order to strengthen competitive advantages, innovation and thus obtain growth. However, in some entities the way of managing knowledge is done in a reductionist and linear way, without considering that knowledge is a social, complex construction, between people and groups. This motivated the investigation, broadening the perspective of using systems analysis techniques to support knowledge management. This research seeks to identify the dynamics of knowledge in food production processes of the Corporación Country Club Ejecutivos from a systemic perspective so that this knowledge can be managed effectively. The research was initially based on the review of the literature, with the aim of finding the usefulness that represents the application of the systems analysis techniques in knowledge management, after defining the system to be studied: the area of food production of Corporación Country Club Ejecutivos (CCCE), the main variables affecting the dynamics of knowledge in this system were identified, later the interactions between variables and the loops that emerge were found, given that they provide the greatest complexity, and consequently a diagram of causal relationships that facilitates the understanding of the dynamics of knowledge of the organization. This contribution would serve to implement better knowledge management strategies to the reality of the organization.Ítem Extracción automática de lineamientos sobre relieves sombreados : metodología y aplicación de esta en tres proyectos geológicos en los Andes del Norte(Universidad EAFIT, 2020) Arias López, Manuel Felipe; Duque Trujillo, José FernandoÍtem Fluid-structure coupling using lattice-Boltzmann and fixed-grid FEM(ELSEVIER SCIENCE BV, 2011-08-01) Garcia, Manuel; Gutierrez, Jorge; Rueda, Nestor; Mecánica AplicadaThis paper presents a method for the fluid-structure interaction by a hybrid approach that uses lattice-Boltzmann method (LBM) for the fluid dynamics analysis and fixed-grid FEM (FGFEM) for the structural analysis. The method is implemented in a high performance platform using GPUs to provide a high level of interactivity with the simulation. The solution uses the same Cartesian grid for both solvers. The coupling between both methods is accomplished by mapping the macroscopic pressure, velocity or momentum values from the LBM simulation into the corresponding nodes of the FGFEM structural problem. In spite of being based on a Cartesian grid, both solvers take into account the effect of curve boundaries. Also the effect of a moving boundary is considered in the fluid simulations. The examples presented in this paper show that the accuracy of the solution is as the same level of the finite volume method of the finite element method. On the other hand, the performance of the parallel implementation of the proposed method is of the order that allows real-time visualisation of the computing values for two-dimensional problems. © 2011 Elsevier B.V. All rights reserved.Ítem Graph-based structural analysis of planar mechanisms(Springer Netherlands, 2017-01-01) Durango, S.; Correa, J.; Ruiz, O.E.; Universidad EAFIT. Departamento de Ingeniería Mecánica; Laboratorio CAD/CAM/CAEKinematic structure of planar mechanisms addresses the study of attributes determined exclusively by the joining pattern among the links forming a mechanism. The system group classification is central to the kinematic structure and consists of determining a sequence of kinematically and statically independent-simple chains which represent a modular basis for the kinematics and force analysis of the mechanism. This article presents a novel graph-based algorithm for structural analysis of planar mechanisms with closed-loop kinematic structure which determines a sequence of modules (Assur groups) representing the topology of the mechanism. The computational complexity analysis and proof of correctness of the implemented algorithm are provided. A case study is presented to illustrate the results of the devised method. © 2016, Springer Science+Business Media Dordrecht.Ítem Graph-based structural analysis of planar mechanisms.(Springer Netherlands, 2016-03-03) Durango, Sebastian; Correa, Jorge; Ruiz Salguero, Oscar; Universidad EAFIT. Departamento de Ingeniería Mecánica. Grupo de Investigación CAD CAM CAE, Carrera 49 7 Sur-50, Medellín, Colombia.; Universidad EAFIT. Departamento de Ingeniería Mecánica; Laboratorio CAD/CAM/CAEKinematic structure of planar mechanisms addresses the study of attributes determined exclusively by the joining pattern among the links forming a mechanism. The system group classification is central to the kinematic structure and consists of determining a sequence of kinematically and statically independent-simple chains which represent a modular basis for the kinematics and force analysis of the mechanism. This article presents a novel graph-based algorithm for structural analysis of planar mechanisms with closed-loop kinematic structure which determines a sequence of modules (Assur groups) representing the topology of the mechanism. The computational complexity analysis and proof of correctness of the implemented algorithm are provided. A case study is presented to illustrate the results of the devised method.Ítem NLDYNA - Nonlinear Dynamic Analysis(Universidad EAFIT, 2020) Parra Cardona, Julián David; Gómez Cataño, Juan DavidThis project describes a general in-house finite element assembler and solver aimed at studying the non-linear response of dynamic systems. The code is intended, and has been developed, to be used in the testing of material models, complex kinematic formulations and/or novel structural systems commonly required in research activities. The code has been implemented on top of SolidsPy and has been deployed in a GitHub repository which allows portability, strict control version and facilitates it extension in future developments.Ítem Quality identification methodology applied to wall-elements based on modal analysis(Emerald Group Publishing Ltd., 2015-01-01) Zóltowski, M.; Martinod, R.M.; Universidad EAFIT. Departamento de Ingeniería Mecánica; Estudios en Mantenimiento (GEMI)Purpose - The recommendation of structural standards, e.g. PN-B-03002, shows a need to control the production quality of wall-elements; the quality control demands suitable guidelines to fit the requirements of the current mass-production of the wall-elements, then, the structural standard recognizes the need of improving the methods to identify the real elements quality. The paper aims to discuss these issues. Design/methodology/approach - The proposed inspection methodology corresponds to assessment models that combine the numerical and symptomatic models to evaluate the critical levels of wall-elements, based on non-intrusive tests through the measurement of a set of signals, using the Experimental Modal Analysis (EMA)-based techniques. Findings - The presented work is developed with an approach that applies advanced calculating techniques used for the structural analysis in civil engineering focused on the technical state assessment. Originality/value - The paper proposes a diagnostic methodology that can be added to the current regulations and standards based on EMA techniques. © Emerald Group Publishing Limited.Ítem Shape optimisation of continuum structures via evolution strategies and fixed grid finite element analysis(SPRINGER, 2004-01-01) Garcia, MJ; Gonzalez, CA; Mecánica AplicadaEvolution strategies (ES) are very robust and general techniques for finding global optima in optimisation problems. As with all evolutionary algorithms, ES apply evolutionary operators and select the most fit from a set of possible solutions. Unlike genetic algorithms, ES do not use binary coding of individuals, working instead with real variables. Many recent studies have applied evolutionary algorithms to structural problems, particularly the optimisation of trusses. This paper focuses on shape optimisation of continuum structures via ES. Stress analysis is accomplished by using the fixed grid finite element method, which reduces the computing time while keeping track of the boundary representation of the structure. This boundary is represented by b-spline functions, circles, and polylines, whose control points constitute the parameters that govern the shape of the structure. Evolutionary operations are applied to each set of variables until a global optimum is reached. Several numerical examples are presented to illustrate the performance of the method. Finally, structures with multiple load cases are considered along with examples illustrating the results obtained.Ítem Structural Controls on Geothermal Systems along the Northern Andes of Colombia : An Integrated Remote Sensing Analysis of the Dabeiba and Sibundoy Valley Geothermal Fields(Universidad EAFIT, 2024) Montoya Londoño, Nicolás; Marín Cerón, María IsabelThis study employs a combination of remote sensing techniques and geothermal analysis to investigate the structural and thermal characteristics of two geothermal systems in Colombia. By utilizing Mark's proposal (1992) for delimitating lineaments, and Principal Component Analysis (PCA) for generating shadow models, the research highlights regional and local structural features that are closely associated with geological structures. Fault systems and lineaments emerge as crucial elements influencing subsurface fluid flow, heat transfer, and the development of geothermal reservoirs. The integration of remote sensing data with advanced structural analysis techniques reveals significant factors shaping geothermal dynamics in the region. These findings emphasize the necessity of considering structural controls in the exploration and sustainable management of geothermal resources. The study focuses on the Dabeiba Geothermal System (DGS), potentially linked to a Miocene extensional event, emphasizing the role of fault structures, especially in the Guineales Formation, as conduits for fluid flow and heat migration from deep sources. The complex structural zones with different degrees of deformation and fracture densities directly influence the advection of the isotherms near the Dabeiba-Pueblo Rico suture zone. This geothermal play system is dominated by fault-controlled non-magmatic convection, where convection occurs predominantly along fault lines and is accompanied by meteoric water infiltration along their traces. The Sibundoy Valley Geothermal System (SVGS) as a typical example of a mixed geothermal system, where heat originates from a young magmatic source but is mainly controlled by deep faults within a pull-apart basin. These faults not only influence the distribution of monogenetic volcanoes but also shape the spatial arrangement of hydrothermal springs. The interaction between geological structures and fluid flow patterns highlights the complexity of geothermal systems. Furthermore, the presence of partial crystallizations and unique caldera geometries leads to the formation of seal layers or condensate layers, redirecting both meteoric water recharge fluxes and volcanic heat fluxes, significantly impacting hydrogeological and geothermal dynamics. This research contributes valuable insights for the geoscientific and energy exploration communities, informing decision-making processes for the assessment and development of geothermal resources.