oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2018 ( 22 )

2017 ( 18 )

2016 ( 16 )

2015 ( 125 )

Custom range...

Search Results: 1 - 10 of 8983 matches for " Gustavo Chio "
All listed articles are free for downloading (OA Articles)
Page 1 /8983
Display every page Item
Estimación de las funciones de vulnerabilidad sísmica en edificaciones en tierra
Maldonado Rondón,Esperanza; Chio Cho,Gustavo;
Ingeniería y Desarrollo , 2009,
Abstract: this paper presents a model to assess seismic damage of earth buildings when a seismic action occurs; this is carried out through seismic vulnerability functions. the model relates the vulnerability index with the damage index according to a specific seism. seismic vulnerability is based on the index proposed by benedetti y petrini [1] adapted to the condition of colombian buildings. the damage index is estimated using the capacity/demand relationship. a sample of the 53 earth buildings in bucaramanga was considered in the construction of the seismic vulnerability functions. the vulnerability index and the damage index were calculated on each one of the buildings for different maximum accelerations, and then with these indexes a vulnerability functions were estimated. these functions were used to evaluation seismic damage in the city of bucaramanga.
Comportamiento estructural y criterios de dise?o de los puentes extradosados: visión general y estado del arte
Benjumea,José; Chio,Gustavo; Maldonado,Esperanza;
Revista ingeniería de construcción , 2010, DOI: 10.4067/S0718-50732010000300004
Abstract: over the past 10 years, extradosed bridges have become an attractive structural type around the world, due to the good results obtained with the first bridges constructed in japan. this new typology, generally recognized as an intermediate solution between cable stayed bridges and cantilever constructed prestressed box-girder bridges, because these take advantages of design and constructions methods of the other two typologies, has become an interesting option. therefore, given the interest that exist about this type of bridge, in this paper the historical context that describes its origin, the influence of the principal structural elements and the design criteria proposed by researchers are presented. in this way it is expected to offer a general insight into the design conception and structural behavior of extradosed bridges, so that they may be considered as an alternative structure for bridges in the americas.
Indice de vulnerabilidad estructural ante los efectos de remoción en masa en edificaciones de mampostería basado en conjuntos difusos
Maldonado Rondón,Esperanza; Chio Cho,Gustavo;
Revista ingeniería de construcción , 2012, DOI: 10.4067/S0718-50732012000100002
Abstract: the aim of this paper is to develop a simple model to assess structural vulnerability of buildings at a regional scale. this model was especially made for areas where current reports on damages of buildings do not exist. the method is based on the identification of the most influential characteristics associated with damage in building under the action of the effect effects of landslides. the evaluation of these characteristics was carried out by means of the determination of fourteen (14) parameters. a vulnerability degree and an importance value based on experts' opinions were assigned to each of the 14 parameters. due to the imprecision and subjectivity of the opinions, data was processed by means of fuzzy logic techniques. once each one of the parameters was qualified, the qualifications of the parameters were related to their value of importance by means of a fuzzy factorial. the result of this relationship, according to techniques based on fuzzy set, is the building vulnerability index.
Uso de aisladores de base en puentes de concreto simplemente apoyados
Rico Pradilla,Leocadio; Chio Cho,Gustavo;
Tecnura , 2012,
Abstract: the aim of this paper is to present a comparison of the seismic behavior of simply supported concrete bridges by using three types of base isolators, namely high damping rubber bearing (hdrb), lead rubber bearing (lrb) and friction pendulum system (fps). "la flora" viaduct is taken as case study; the geometry and the corresponding modeling of such viaduct are defined in sap2000. additionally, the mechanical properties of three insulators are defined using a bilinear model. an analysis of histories in time was made for the model of the viaduct, considering the non-linearity in the insulators and using frontal fault earthquakes caused by the frontal and bucaramanga-santa marta fault; this is applied at a surface-level scale. the results from the model without seismic isolation are compa-red with the three systems of seismic isolation and the findings suggest that the different systems of seismic isolation signifcantly reduce both the demands of the displacements and the cutting forces in the piles of the bridge, which may induce probable earthquakes.
Uso de aisladores de base en puentes de concreto simplemente apoyados
Leocadio Rico Pradilla,Gustavo Chio Cho
Tecnura , 2012,
Abstract: The aim of this paper is to present a comparison of the seismic behavior of simply supported concrete bridges by using three types of base isolators, namely high damping rubber bearing (HDRB), lead rubber bearing (LRB) and friction pendulum system (FPS). “La Flora” viaduct is taken as case study; the geometry and the corresponding modeling of such viaduct are defined in sap2000. Additionally, the mechanical properties of three insulators are defined using a bilinear model. An analysis of histories in time was made for the model of the viaduct, considering the non-linearity in the insulators and using frontal fault earthquakes caused by the Frontal and Bucaramanga-Santa Marta fault; this is applied at a surface-level scale. The results from the model without seismic isolation are compared with the three systems of seismic isolation and the findings suggest that the different systems of seismic isolation significantly reduce both the demands of the displacements and the cutting forces in the piles of the bridge, which may induce probable earthquakes.
Estimación de las funciones de vulnerabilidad sísmica en edificaciones en tierra
Esperanza Maldonado Rondón,Gustavo Chio Cho
Ingeniería y Desarrollo , 2009,
Abstract: En este trabajo se presenta una metodología para definir el da o producido por un sismo de aceleración pico efectiva de dise o, Aa, igual a 0.02 g y 0.05 g en edificaciones en tierra apisonada (tapia) o adobe, por medio de la generación de funciones de vulnerabilidad. La metodología propuesta consiste en relacionar un índice de vulnerabilidad con un índice de da o en función de un evento sísmico determinado. El modelo de índice de vulnerabilidad se basó en el que propusieron por Benedetti y Petrini [1], adaptado a las características de las edificaciones colombianas, y el índice de da o fue determinado mediante una relación demanda-capacidad. La construcción de las funciones requirió contar con una muestra de 53 edificaciones existentes en la ciudad de Bucaramanga. A cada uno de los edificios se le calculó su índice de vulnerabilidad y su índice de da o para diferentes aceleraciones máximas, y con ellos se construyeron las funciones de vulnerabilidad. Las funciones definidas en esta investigación fueron aplicadas en las edificaciones de la ciudad de Bucaramanga.
Indice de vulnerabilidad estructural ante los efectos de remoción en masa en edificaciones de mampostería basado en conjuntos difusos Structural vulnerability index to the effects of landslides in masonry buildings based on fuzzy sets
Esperanza Maldonado Rondón,Gustavo Chio Cho
Revista ingeniería de construcción , 2012,
Abstract: En este trabajo se presenta un modelo rápido y sencillo de evaluación de la vulnerabilidad estructural de edificaciones a escala regional. El modelo fue construido de forma que puede ser aplicado especialmente a zonas donde no se cuenta con información de da os reales. El método se basa en la identificación de las características más relevantes e influyentes en el da o que sufrirá una edificación bajo la acción de un efecto de remoción en masa. La valoración de estas características se realizó mediante la determinación de catorce (14) parámetros, a los cuales se les asignó un grado de vulnerabilidad y un valor de importancia relativa con base en la opinión de expertos. Debido a las imprecisiones y subjetividad de las opiniones, estas fueron procesadas mediante técnicas de lógica difusa. Una vez calificados cada uno de los parámetros, se procedió a relacionar sus calificaciones con su valor de importancia por medio de un factorial difuso. El resultado de esta relación por medio de técnicas basadas en conjuntos difusos corresponde al índice de vulnerabilidad. The aim of this paper is to develop a simple model to assess structural vulnerability of buildings at a regional scale. This model was especially made for areas where current reports on damages of buildings do not exist. The method is based on the identification of the most influential characteristics associated with damage in building under the action of the effect effects of landslides. The evaluation of these characteristics was carried out by means of the determination of fourteen (14) parameters. A vulnerability degree and an importance value based on experts' opinions were assigned to each of the 14 parameters. Due to the imprecision and subjectivity of the opinions, data was processed by means of fuzzy logic techniques. Once each one of the parameters was qualified, the qualifications of the parameters were related to their value of importance by means of a fuzzy factorial. The result of this relationship, according to techniques based on fuzzy set, is the building vulnerability index.
Comportamiento estructural y criterios de dise o de los puentes extradosados: visión general y estado del arte Structural behavior and design criteria of extradosed bridges: general insight and state of the art
José Benjumea,Gustavo Chio,Esperanza Maldonado
Revista ingeniería de construcción , 2010,
Abstract: Durante los últimos 10 a os, los puentes extradosados se han convertido en una solución estructural atractiva alrededor del mundo, gracias a los buenos resultados obtenidos con las primeras realizaciones en Japón. Esta nueva tipología, reconocida generalmente como una solución intermedia entre los puentes atirantados y los de pretensado de viga cajón construidos por voladizos sucesivos, se ha convertido en una opción interesante. Por consiguiente, dado el interés que hoy en día existe alrededor de este tipo de puente, en este trabajo se presenta el contexto histórico que describe su origen, y se exponen la influencia de los principales elementos estructurales en el comportamiento del puente, y los criterios de dise o que han sido propuestos por investigadores en el tema. De esta manera, se espera ofrecer una visión general de la concepción y el comportamiento estructural de los puentes extradosados para que sea considerada una alternativa más de tipología estructural de puentes en nuestro medio. Over the past 10 years, Extradosed bridges have become an attractive structural type around the world, due to the good results obtained with the first bridges constructed in Japan. This new typology, generally recognized as an intermediate solution between cable stayed bridges and cantilever constructed prestressed box-girder bridges, because these take advantages of design and constructions methods of the other two typologies, has become an interesting option. Therefore, given the interest that exist about this type of bridge, in this paper the historical context that describes its origin, the influence of the principal structural elements and the design criteria proposed by researchers are presented. In this way it is expected to offer a general insight into the design conception and structural behavior of Extradosed Bridges, so that they may be considered as an alternative structure for bridges in the Americas.
Simulación de funciones de vulnerabilidad y matrices de probabilidad de da?o sísmico para edificaciones de hormigón armado en sistema pórtico
Maldonado Rondón,Esperanza; Goméz Araujo,Iván Dario; Chio Cho,Gustavo;
Ingeniería e Investigación , 2008,
Abstract: this paper outlines vulnerability functions and seismic damage probability matrixes being constructed for reinforced concrete frame buildings. these functions and matrixes were based on simulation techniques and experts? opinion. the proposed functions and matrixes relate a building?s vulnerability to the level of damage which might be incurred, depending on an earthquake?s motion. vulnerability was defined by estimating an index proposed by expert opinion. damage was defined by means of a damage index depending on nonlinear static analysis. simulation techniques were used for constructing hypothetical buildings and thereby to building the functions and matrixes. such buildings represented the typical characteristics of colombian cities? reinforced concrete frame system ( bucaramanga for example). a set of tools was made for constructing and applying these functions and matrixes, allowing us to determine the level of seismic damage by using the buildings? characteristics for specific seismic action.
Aplicación de los conjuntos difusos en la evaluación de los parámetros de la vulnerabilidad sísmica de edificaciones de mampostería
Maldonado Rondón,Esperanza; Gómez Araújo,Iván; Chio Cho,Gustavo;
Ingeniería y Desarrollo , 2007,
Abstract: the evaluation of seismic vulnerability of masonry buildings in colombian cities is a pressing need, as it is one of the most predominant structural systems. day to day, the post earthquake attention programs force us to consider a good planning of the elements involved in the development of the cities. the housing buildings are an important aspect into consideration, and among them, the masonry building are elements of major priority. there are different methodologies for its evaluation but many of these have been built based on records of observed damages and analytic models both are complex, making its application only to the place were built. therefore, is it important to propose models adjustable to colombian conditions and for doing this, it is necessary to identify the parameters which influence the most in the vulnerability of masonry structures of our cities. the aim of this paper is to present the identification and assessment of these parameters. this study was based on the opinion of experts. finally, it is presented the model that allows the correlation between vulnerability degrees of each one of the parameters with its value of importance; this correlation leads to calculate the seismic vulnerability.
Page 1 /8983
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.