Dr. Carlos González Bravo | UPM Universidad Politécnica de Madrid (original) (raw)

Papers by Dr. Carlos González Bravo

Detail: revista de arquitectura y detalles …, 2011

... concienciación guber-namental respecto de la conservación de bienes inmuebles, de protocolos ... more ... concienciación guber-namental respecto de la conservación de bienes inmuebles, de protocolos sobre ins-pección técnica de edificios o de los fondos destinados a subvencionar obras de rehabili-tación, la realidad de estas estructuras forma parte del cajón desastre de la ...

Efecto Estela - parte III (Stele Effect - part III)El análisis estadístico de 907 encuestas reali... more Efecto Estela - parte III (Stele Effect - part III)El análisis estadístico de 907 encuestas realizadas a alumnos de Arquitectura y sus profesores por medio de la denominada Encuesta Empática, con el objetivo de analizar las divergencias emocionales entre profesores y alumnos y sus consecuencias en el aprendizaje, han puesto de manifiesto un efecto anómalo e inesperado, contradictorio con los supuestos de partida. Inicialmente cabía esperar que a mayor competencia emocional del docente, mejor evaluación recibiría por parte del alumno. Sin embargo los resultados muestran paradójicamente cómo a mayor distancia (la denominamos Distancia Propia) del profesor respecto a lo que el alumno opina del mismo (Inferencia Propia), mejor evaluado emocionalmente es el docente. Lo hemos denominado Efecto Estela y correspondería con la atracción que despliega el docente narcisista, ya mencionada con anterioridad por la literatura sociológica, pedagógica y psicoanalítica, pero hasta ahora no parametri...

watertight connector for peritoneal dialysis, consisting of two parts (1) and (5), designed for d... more watertight connector for peritoneal dialysis, consisting of two parts (1) and (5), designed for draining and filling the peritoneum of renal patient, so that fluid can flow in both directions and is completely sealed in the position it is not connected.

Luggage reinforcement beams and joists forged, pairs of cover studs and other structural elements... more Luggage reinforcement beams and joists forged, pairs of cover studs and other structural elements of wood. # Reinforcement system wooden structures by profile cold-formed steel folding and symmetrical (3) with vertical plates and horizontal at the top and larger at the symmetry axis (4) vertical shaft, and which protrudes from the bottom to be inserted into the reinforcing element (2).

Cercha Revista De Los Aparejadores Y Arquitectos Tecnicos, 2009

Advanced Materials Research, 2012

The main objective of this paper is to analyze the behaviour of cold formed steel cross section r... more The main objective of this paper is to analyze the behaviour of cold formed steel cross section respect to mechanical characteristics, such as deflection, mainly. A cold formed steel profile with thickness of 1 mm regards is studied to determine its viability as reinforcement of timber upgrading. Thus, temperatures, stresses and strains have been analysed during the manufacturing process of these profiles, and also, the deflection supported, comparing between unreinforced and reinforce pieces. The analysis has been carried out by means of Finite Element Method, using DEFORM 2D software, during the simulation of manufacturing process and COPRA software during the final static computations. Results provide information about the integrity and good behavior of these profiles for timber upgrading.

AIP Conference Proceedings, 2012

ABSTRACT The aim of this paper is to study the mechanical capacity improvement in a cold formed s... more ABSTRACT The aim of this paper is to study the mechanical capacity improvement in a cold formed steel cross section with thickness of 1 mm regards to a cross section made by means of hot-rolled steel with thickness of 4 mm, respectively. Likewise, the differences are studied in the manufacturing processes used in both profiles, and the particularities of cold formed steel cross section. This paper analyzes temperature, stress and deformations using Element Method DEFORM software. This research has been focused in the study of accumulation points of stress to verify the behavior of the sheet of cold formed steel during the folded process. Stress of the steel cross section has been analyzed during the folded process, showing instant step of simulation. Conclusions show how these points of stress concentration could be an influence during the manufacturing process.

Wrap system prefabricated insulated facades. # Surround system (4) in prefabricated insulated fac... more Wrap system prefabricated insulated facades. # Surround system (4) in prefabricated insulated facades, comprising panels (6) insulation and self-supporting shape, with assembly means and positioning means, wherein each panel (6) comprising a first layer (1) of support, a second layer (2) of insulation on the above, a third layer (3) outside the second layer (2), and means for fixing to the facade formed by at least one fastening anchor (7) on each corner panel (6), wherein each fastening anchor (7) has a first end (7.1) suitable for attachment to the facade and a second end (7.2) suitable for coupling the panel (6).

En esta tesis se plantea un sistema de planificación preoperatoria en la Artroplastia Total de Ca... more En esta tesis se plantea un sistema de planificación preoperatoria en la Artroplastia Total de Cadera (ATC) en base a una metodología específica con un conjunto de parámetros o variables. Dichas variables pueden ser internas “inherentes al paciente” (morfología cérvico-diafisiaria, deformidades de raquis, etc.), o bien externas, ajenas al paciente (ángulo de abducción, espesor, material y dimensiones de la cabeza femoral, posicionamiento del centro de rotación de la cadera, etc.). Para poder validar esta metodología se han llevado a cabo 1.008 simulaciones (en grupos de 504) por elementos finitos sobre insertos de polietileno de ultra alto peso molecular, y de las que se han extraído 2.016 valores de tensiones de Von Mises e Intensidad de Tensión como indicadores del riesgo de desgaste y posterior fracaso protésico. Todas las variables han sido parametrizadas con la finalidad de poder realizar un estudio estadístico de los resultados obtenidos. Dichos resultados señalan una fuerte r...

Ponència presentada a: Session 3: Laboratorios de diseño innovador basado en la interacción human... more Ponència presentada a: Session 3: Laboratorios de diseño innovador basado en la interacción humana / Laboratories for human centered innovative design interactio

Materials, 2021

Wear debris in total hip arthroplasty is one of the main causes of loosening and failure, and the... more Wear debris in total hip arthroplasty is one of the main causes of loosening and failure, and the optimal acetabular fixation for primary total hip arthroplasty is still controversial because there is no significant difference between cemented and uncemented types for long-term clinical and functional outcome. To assess and predict, from a theoretical viewpoint, the risk of wear with two types of polyethylene liners, cemented and uncemented, a simulation using the finite element (FE) method was carried out. The risk of wear was analyzed according to different variables: the polyethylene acetabular component’s position with respect to the center of rotation of the hip; the thickness of the polyethylene insert; the material of the femoral head; and the relationship of the cervical–diaphyseal morphology of the proximal end of the femur to the restoration of the femoral offset. In all 72 simulations studied, a difference was observed in favour of a cemented solution with respect to the ...

Journal of Personalized Medicine, 2021

The wear rate on Total Hip Arthroplasty (THA) entails a heavy burden for patients. This becomes m... more The wear rate on Total Hip Arthroplasty (THA) entails a heavy burden for patients. This becomes more relevant with increased wear risk and its consequences such as osteolysis. In addition, osteolysis has been described in cemented and uncemented acetabular implants, and nowadays, controversy remains as to whether or not to cement the acetabular component. A personalized theoretical study was carried out to investigate which parameters have an influence on wear risk and to determine the best fixation method. Liner wear risk was assessed for two different types of fixation (cemented vs uncemented) through Finite Elements Analysis (FEA). The intraoperative variables used to determine the wear risk (cervical-diaphyseal angle, Center of Rotation positioning -COR-, head material, head size, and liner thickness) are vital parameters in surgical planning. Two types of tridimensional liner models of Ultra High Molecular Weight Polyethene (UHMWPE) were simulated through finite element analysi...

Base hidden safety electric plug. # Base hidden electrical enchute security comprises a piece-fix... more Base hidden safety electric plug. # Base hidden electrical enchute security comprises a piece-fixed (1) within which one (2)-rotating part to which the plug (12) of the electrical receiver is connected is coupled can accommodate this (2) a piece of electrical protection (3) inside, hiding all these elements together round the inside of the piece-fixed (1),-rotating part being hidden base-rotating part and inaccessible to direct contact of people and avoiding the risk of electrocution.

Floor heating systems, hung, prefabricated and dismountable by connections (2) distributing fluid... more Floor heating systems, hung, prefabricated and dismountable by connections (2) distributing fluid, responsible for channeling the fluid to the radiant panels (3) said panels conditioners hooked connections (2) through pipes flexible (10) being . Both connections (2) and the hoses (10). They have valves (9) for the passage of fluid. Radiant heaters contain within a piping system (5) which cover the entire surface of the radiant panel and by which fluid flow occurs. The whole system is hung below the structure (1) and attached thereto.

Prosthesis hip joint with reduced effort and anteversion angle of the femoral head. # System d hi... more Prosthesis hip joint with reduced effort and anteversion angle of the femoral head. # System d hip joint with reduced effort and anteversion angle of the femoral head comprising a femoral part (1) € prosthesis whose top is flush resection of the femoral head bone (4) and houses inside a piece of cup (8) which in turn allows the rotation of a spherical head (9) which is attached to a connecting piece (11) fixed by turning on a piece-acetabulum (16) in turn implemented on the pelvic bone (14).

Detail: revista de arquitectura y detalles …, 2011

Cercha Revista De Los Aparejadores Y Arquitectos Tecnicos, 2009

Advanced Materials Research, 2012

AIP Conference Proceedings, 2012

Materials, 2021

Journal of Personalized Medicine, 2021

This paper describes of a sintetical way the origin of the upgrading wooden structures by ipper s... more This paper describes of a sintetical way the origin of the upgrading wooden structures by ipper side of theslab floor.

DOCTORAL THESIS , 2007

The primary target of this Thesis is the design of a constructive procedure for the reinforcement... more The primary target of this Thesis is the design of a constructive procedure for the
reinforcement and consolidation of lumber in wood floor slabs of ancient buildings using
metallic profiles that settle from the superior face of the floor.
The system has two differentiated applications affluent that are analyzed in this work. First it
is the reinforcement of the pieces that have degradation in lost resistance and rigidity, and
second consists of the recovery or consolidation of the supports of the pieces that are lost
the necessary stability as a result of an intensive degradation.
The study has been developed in two phases. First it has consisted of the previous study of
propose solutions by means of the analysis of the finite elements method (FEM), using
COSMOSWorks. This phase has served to orient the second experimental phase of
verification. The second phase is oriented to group the test in laboratory of 45 different type
and origin pieces: 15 pieces of great squareness of laminated wood, 15 sawn timber pieces
and 15 pieces of ancient buildings. Each group of 15 pieces subdivided itself in 3 sub-groups
of 5 pieces with the following criterion. The first sub-group, served as witness of the pieces
without no type of reinforcement or prothesis. The other two remaining sub-groups for the
study of the reinforcement and the prothesis respectively.
Finally, it has been come to make a real experience in work, in a wood floor slab of an
ancient building (XIX century) in the historic town of Madrid. Tests of field by means of the
application the reinforcements were executed on 32 lumber with different lengths, obtaining
coincident results with the experiences of the laboratory. The conclusion of this system
displays a simple application in the work, with a reasonable cost and mechanical results of
the reinforcements and the prothesis of high effectiveness. The increase of the stiffness is
200% and the increase of the load capacity in the reinforced pieces is 150%. The recovery of
the supports by means of the metallic prothesis reaches an acceptable load capacity. The
use of FEM has been of great value and effectiveness for the project of the reinforcement
solutions.