Download or read book Vulnerabilidad s smica en edificaciones porticadas compuestas de acero y hormig n armado written by Ronald David Ugel Garrido and published by . This book was released on 2015 with total page 323 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this study it was assessed the seismic behavior of framed buildings with composite structure of steel and reinforced concrete (RC) in a specific configuration formed with lower levels with RC (primary structure) and higher levels with steel (secondary structure) as structural materials for components. This typology results from post-construction and post-project modifications; It was analyzed the seismic vulnerability and structural behavior in typical models of buildings for residential or commercial use currently being built or already built in the metropolitan area Barquisimeto-Cabudare in Venezuela. Models or existing buildings are divided into three groups: low-rise, medium height and tall buildings. Levels with steel elements correspond to the higher or two higher levels of the buildings. Static and dynamic nonlinear analyses were conducted to determine the parameters of capacity, fragility and damage of structural systems. These analyses were based on criteria for projects such as RISK UE, FEMA 750 and ATC 40, along with methodologies such as Spectrum-Capacity, N2, Adaptive Pushover and the Capacity Parametric Model. The difference in performance was remarkable in some models depending on rigidities and the heights of models; Inter story displacements evidenced that in some structural systems, some levels experienced its maximum displacement in the elastic response range, whereas at other levels there is a high concentration of inelasticity. Fragility curves and damage indices were determined using two different methodologies in order to assert the behavior in terms of reliability and it was evidenced that in some structural systems there is a great probability of zero damage while in others predominate a high probability of reach moderate, severe or collapse damage states. In Time-History and Incremental Dynamic analysis, were used 5 real and 5 synthetic accelerograms; All of them were normalized and each one, with their corresponding mean, maximum and minimum deviations, resulted in 20 seismic signals that were used for purposes of structural reliability. All accelerograms were compatible with the elastic spectrum corresponding to the emplacement site design of the building stiff soil. Numerical results show that with these accelerograms most of the models suffer significant lateral deformations, often reaching beyond acceptable limits states from the Venezuelan normative. It was performed a experimental test of a two level frame with Steel elements in the higher level and Reinforced Concrete elements in the lower level. Another experimental test was performed on a full-scale mixed Steel-Reinforced Concrete joint. Both tests were subjected to cyclic lateral loads in order to determine its characteristics, behavior and capacity to histeretics actions in terms of stiffness degradation and damage evolution. Concerning to capacity and damage indexes, it was showed the influence of horizontal relative displacements of each level and the stiffness degradation as key parameters in determining the damage to a building. All this was revalidated with a probabilistic approach to the Damage Index. Experimental results showed very similar values in absolute and relative terms to those obtained in the numerical models. In these numerical and experimental process was used the Capacity Parametric Model (CPM) and the fragility and damage models associated with this methodology. Finally to achieve structural continuity at the structural joint of steel columns with reinforced concrete elements, it was evidenced that it can be used the AISC and ASCE design criteria for base-plates for steel columns. Otherwise, the composite joints should be considered semi-rigid connections.

Download or read book Vulnerabilidad S smica de Edificios de Acero written by Carlos Alberto Bermúdez Mejía and published by Ewe Editorial Acad MIA Espa Ola. This book was released on 2011-11 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt: Las estructuras de acero ocupan un lugar muy importante en el panorama de las construcciones civiles. Sea por razones arquitectonicas o estructurales, constituyen una respuesta favorable a muchos requerimientos de la industria de la construccion. Sin embargo, tambien es cierto que el comportamiento de los elementos individuales y de sus conexiones se ve muy afectado por diversos factores que pueden llegar a comprometer una respuesta global satisfactoria del edificio. Entre estos factores estan la configuracion estructural, la resistencia relativa entre los diferentes miembros, y la variabilidad de las propiedades mecanicas y geometricas y de las cargas de gravedad y sismicas. Cuanto pesa cada uno de estos factores, en el comportamiento del conjunto? Que estados de dano se presentaran desde el comportamiento elastico hasta el de falla en cada caso y bajo que valores de desplazamiento espectral? Que variabilidad estadistica presentan los valores de desplazamiento espectral asociados a cada estado de dano? Cuanta confiabilidad estructural ofrecen los codigos de construccion modernos? Estos son algunos de los interrogantes que se responden mediante esta investigacion."

Download or read book Una Evaluaci n num rica de la vulnerabilidad s smica de edificios de hormig n armado written by Juan José Mas Viñola and published by . This book was released on 1993 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Recalibraci n del ndice cualitativo de vulnerabilidad s smica de edificios de hormig n armado para la ciudad de Concepci n written by Darío Miguel Jara Weisser and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Determinaci n de un ndice cualitativo de vulnerabilidad s smica de edificios de hormig n armado en Concepci n written by Gonzalo Andrés Cáceres Gajardo and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Determinaci n de un ndice cualitativo de vulnerabilidad s smica de edificios de hormig n armado en el gran Concepci n written by Camila Andrea Parodi Figueroa and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book An lisis de la vulnerabilidad s smica de un edificio en hormig n armado written by Sonia Borrás González and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Els efectes provocats per qualsevol tipus de desastre natural acaben sent devastadors, fins al punt d'inhabilitar ciutats senceres. En el cas dels terratrèmols, aquests són capaços de destruir qualsevol tipus d'infraestructura en qüestió de segons. El temor a no arribar als nivells de seguretat mínims ha donat motiu a millorar els nivells de disseny i el mètode de construcció de qualsevol tipus de construcció. Amb aquest Projecte es pretén analitzar la vulnerabilitat d'una estructura real de formigó armat. L'edifici en qüestió està situat a la ciutat de Barcelona, que encara que pertanyi a una zona amb un nivell sísmic baix, no es descarta que en un futur pugui sofrir un terratrèmol. A partir de l'aplicació de les diferents normatives que tracten sobre el disseny per sisme i de l'ús del programa d'anàlisi computacional ETABS, es vol estudiar què tipus de resposta tindria l'edifici en qüestió davant un moviment de la terra i quin seria el seu estat últim funcional.

Download or read book Calibraci n del ndice de vulnerabilidad s smica del G N D T para edificios de hormig n armado written by Viviana Cecilia Letelier González and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Estudio de la vulnerabilidad s smica de edificios de hormig n armado written by Sergio Moreno Rodríguez and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Les greus conseqüències que succeeixen tant en edificis com en infraestructures urbanes, es deuen a les grans accions o catàstrofes naturals devastadores que ocorren sense poder ser controlades i que fins fa relativament pocs anys no s'ha tingut prou en compte. Una d'aquestes catàstrofes naturals són els terratrèmols, que són fenòmens que ocorren pel trencament de plaques tectòniques, les quals es diuen falles. Els terratrèmols, també anomenats sismes es produeixen a certa profunditat de l'escorça terrestre, aquest punt es diu hipocentre. El mateix punt projectat en l'escorça terrestre s'anomena epicentre. Des del hipocentre es propaguen els diferents tipus d'ones que produeix el sisme i es van dissipant a mesura que avancen. Els sismes, com ja he comentat, són uns fenòmens que provoquen destrosses que ocasionen amb grans pèrdues econòmiques i amb la mort d'un nombre elevat de persones, generalment es troben relacionades amb el comportament poc adequat o insuficient de les estructures. I tot això per no prestar la suficient atenció a l'estudi sísmic estructural. Com que els terratrèmols tenen un paper prou important pel que fa a seguretat estructural, és digne de ser estudiat l'efecte que produeixen en els edificis.